Weird Planets 8

Good morning. I am your replacement driver and tour guide. Your previous driver, um, has been... has been asked to stay home today.

Hope you had a large breakfast, because we’re going to visit several ‘HD’ systems on this leg, and it could be a long time until supper. Everybody buckled in? If not, get that way, ‘cause we’re headed out.

Okay, on the right side is HD 106906 b. It’s 11 times the size of Jupiter. Yes, it does have a parent star. It’s one of those bright bits of light ahead of us. This planet’s distance from its star is 650 times as Earth’s distance from our sun, so I can’t blame you for asking. Despite being so remote from its star, the average temperature on the surface is 1500° Celsius, which is 2,732° Fahrenheit. That’s pretty toasty warm, in my mind. Scientists say it shouldn’t exist at all, being so large and so far from its parent. Where did it get enough material that far out? But however it came to exist, it’s only 13 Million years old. Just a baby, really, since the universe is over 14 Billion years. So maybe it just hasn’t had a chance to cool off since it came into being?

Now, right over here is Osiris, more formally known as HD 209458 b, which was the first planet to be seen as it crossed in front of its star. It’s also the first planet to have its light directly detected. Its discovery showed that transit observations were possible, which opened up a whole new realm of exoplanet discovery.

The planet ahead of us is HD 189733 b. It’s about the size of Jupiter, and has been studied quite a bit ever since scientists discovered it transiting its star while they studied that star using X-ray frequencies. This is also one of the first planets to have its atmosphere ‘sniffed’ to determine its composition. I don’t remember the full list, but I do remember that the atmosphere contains methane. No, that doesn’t necessarily mean there’s cows on that planet. Methane can be produced naturally. It doesn’t have to be a biological byproduct.

Now we come to HD 114762 b, which was discovered in 1989. This is the first discovered planet to be orbiting a sun-like star. However, because its mass is - as seems so popular - 11 times that of Jupiter, and because it only takes 84 days to complete an orbit, it was initially thought to be a brown dwarf. But it’s not. As a comparison, tiny little Mercury takes 88 days to complete an orbit around our sun.

I have to ask you to please be quiet as I approach this one. If it was up to me, we wouldn’t even bother with this one. Too dangerous, if you ask me; you never quite know what to expect from HD 80606 b. It’s orbit is so eccentric-- Oh! Hang on! ... Whew! That was close. I think we’ll be safe now, at least for a few minutes. Besides its highly eccentric orbit, HD 80606 b also displays plenty of storms and atmospheric heating, and you can plainly see how fast it rotates.

Okay, that’s our tour for today. I’ll take you back to base so you can get some supper. I know I’m ready for it. No, I’m sorry, I don’t know who will be your next driver and tour guide. No, I don’t know where you’ll be taken, either. From the looks of it, you still have quite a number of planets to visit. We are all qualified drivers and tour guides, ma’am, otherwise, we wouldn’t have the job.

http://www.express.co.uk/news/science/643662/The-10-weirdest-planets-to-have-been-discovered-so-far

https://www.nasa.gov/feature/jpl/20-intriguing-exoplanets

www.space.com/159-strangest-alien-planets.html

Weird Planets 7

We are about to start our whirl-wind tour of some of the remaining weird planets, but first, please pay attention to the following non-safety-related information:

Who designed the way stars and planets are named? I’ve more or less figured out how it works, but it really doesn’t give you any information about that star or planet. First, there’s some designation that I think indicates who/what ‘discovered’ the star. I recognize ‘Kepler’, which in its 2^nd stage of life is denoted as ‘K2’. But WASP? CaRoT? No Idea. Then comes a number to designate the star. And finally, a letter to designate the planet within that star’s system. The planets are lettered as they are found, so smaller planets probably have later letters than big planets, even if they are closer to that star.

Please keep your hands and legs inside this blog at all times, as I am both driver and tour guide, and we have a lot of space to cover!

The first planet we’ll visit in this 3^rd leg of our tour is PSR J1719-14 b (AKA the Sun Hugger), which is only 3,900 light-years from Earth. This is a possible member of the diamond-planet family (I told you about one of those in an earlier blog), and it races around its star in only 2.2 Earth hours, which makes it the fastest planet in the Ultra-Short-Period-Planet category. Also, it’s a pulsar planet, because its star is a pulsar.

Now, out the other window, take a peek at PSR J1719-1438-?, another pulsar planet orbiting a pulsar 4,000 light-years from Earth. Scientists think this planet was once a star, but when its companion became a pulsar, the huge gravity field stripped most of it away, leaving it with only the mass of Jupiter, and exerted pressure on what was left to make it a diamond planet.

Now around here – somewhere – we can see the PSR B1257+12 system discovered in 1992 and 1994. These pulsar planets at one time were the smallest planetary bodies known to exist outside our own solar system.

Here we’ve reached 12,400 light years from Earth to view PSR 1620-26 b (AKA Methuselah). As you might have guessed, it got its nickname by being old. Too old, some say, because it’s 13 billion years in age, almost 3 times as old as Earth! It would have formed less than 1 billion years after the Big Bang, even though it was thought there wasn’t enough material (I assume they mean heavier elements) to create a core for a planet. So, what’s it made of? I don’t know, they didn’t say. At that distance, maybe they can’t tell. So how do they know how old it is? Do you suppose they counted its wrinkles? J

Okay, you can take a little break now while I get us in another section of the universe.

http://www.popularmechanics.com/space/deep-space/g1265/space-oddities-8-of-the-strangest-exoplanets/

www.space.com/159-strangest-alien-planets.html

https://www.nasa.gov/feature/jpl/20-intriguing-exoplanets

Weird Planets 6

Some of these planets look familiar, which is how they get their nicknames. Is it a surprise that someone has imagined planets similar to actual exoplanets?

HD 188753 is sometimes called Tatooine. It is a Jupiter-sized planet located 149 light-years away from us… in a triple star system. One list explained that this meant the planet orbited a star, which orbited another star, which orbited a third star. They could be right that HD 188753 is set up this way, but it is not the only configuration available to 3 stars and 1 planet. How many other configurations can you come up with?

Whatever the configuration of this system, the gravitational fields would be complex, so scientists were surprised to find planets could be created in such a gravity maelstrom. Dr Maciej Konacki of CalTech feels the view from this planet would be spectacular, with ‘occasional’ triple sunsets. Yes, that’s possible; it depends on the distance between the triplet stars. Some ‘companion’ stars are so far apart that each appears as only a bright point to the other. But this Tatooine would definitely be hot; it completes an orbit around its star in 3.5 Earth days, so it is snuggled up real close.

CoRoT-7b was the first exoplanet to be dubbed a ‘Super Earth’. That means it’s a rocky planet, not a gaseous one. Knowing that other rocky planets exist, scientists can look for potentially habitable planets that reside in a star’s ‘Goldilocks’ zone.

However, this particular planet does not look like a pleasant place, as it is tidally locked to its star, meaning the same side always faces the star, and the temperature on that face is around 4,000° F. If you want to visit, consider that it may be the rocky core of a vaporized gas giant where it rains rocks. Be sure you take a strong umbrella with you!

Kepler-10b is the first rocky planet discovered by the Kepler equipment. It is the smallest known exoplanet; an Earth-sized world that may have a lava ocean on its surface. I love a hot tub, but that’s too hot.

OGLE-2005-BLG-390 is the first ‘cold super Earth’ exoplanet discovered, nicknamed Hoth. The thought is that it began to accumulate a Jupiter-like core of rock and ice, but didn’t stop with just a core. It is 5.5 times the mass of Earth, has a surface temperature of -364° Fahrenheit, and orbits a red dwarf star some 28,000 light-years away.

Well, on this trip, we’ve gone from Tatooine to Hoth. Have we gotten all the ‘extremes’ done? I’m not sure. But next week, we’ll start zipping through the planets that only appeared on 1 list. Bring your seat belt!

http://www.express.co.uk/news/science/643662/The-10-weirdest-planets-to-have-been-discovered-so-far

https://www.nasa.gov/feature/jpl/20-intriguing-exoplanets

www.space.com/159-strangest-alien-planets.html

Fireballs Are Flying!

Try to imagine you are an astronomer, studying another star some 2,000 light years away, V Hydra. It’s an odd star; bloated, red, old, and pulsing - getting brighter, then dimmer, and sometimes getting much dimmer. It may be nearing the end of its life, to start again as a planetary nebula, and if that happens during your lifetime, you want to see it.

And then it throws fireballs.

No, it doesn’t explode. No, these aren’t corona ejections. They are fireballs.

How did it do that?

In October 2016, astronomers were left scratching their heads as Hubble revealed that’s exactly what happened. They studied the star and its surroundings, and eventually they came up with a theory.

V Hydra has a visible companion star (we’ll call it NNS - No Name Star, because they never mentioned a name for it). NNS is an orange dwarf about 46” distance from V Hydra. Yeah, I know, 46 inches doesn’t make any sense to me, either, but that’s actually 46 arcseconds in astronomy notation. They ‘measure’ the distance between these 2 stars by noting the angle change from looking at one to looking at the other. An arcsecond is 1/60th of an arcminute, which is 1/60 of a second... Look, take 2 meter sticks and lay one on top of the other. Stick 2 pieces of paper between them at one end. The angle at the opposite end is about 50 arcseconds. So V Hydra and NNS look like 2 bumps together from Earth, but being 20,000 light years away from us, there’s a good bit of distance between them. Chances are anything NNS might be doing would not cause V Hydra to throw fireballs around.

It appears that V Hydra has a second companion star, this one too dim to be seen directly from Earth, but astronomers have their magic math formulas to figure these things out. We’ll call this one DIM, because it’s so dim. Anyway, DIM orbits V Hydra every 8.5 years in a very elliptical orbit. This orbit is so elliptical that - now that V Hydra is bloated in its death throes - DIM no longer comes close to V Hydra, it actually travels through V Hydra’s outer atmosphere. Wow. Hot enough for ya?

As DIM travels through V Hydra’s outer atmosphere, it greedily grabs a bunch of V Hydra’s material and stores it in a disk about itself. Remember, planets are born from left-over materials in a disk around the new-born star, so I guess maybe DIM wants to start a family.

But, alas, DIM just isn’t very smart, and starts sending its ‘fledgling planets’ away long before they actually make planets. When DIM emerges from V Hydra’s atmosphere, its storage disk breaks apart, forming superhot blobs of plasma about twice the size of Mars that are tossed into the unknown at a speed that they could travel from the moon to Earth in about a half hour.

Poor DIM. Heart-breaking, isn’t it? Now consider that astronomers believe this has been happening every 8.5 years for about 400 years.

The mind boggles, right? But what can we do? I mean, sending DIM a sympathy card every 8.5 years is a bit much, don’t you think? Probably doesn’t want to talk about it, anyway.

How much would it cost to send a card 20,000 light years? Will a regular stamp do?

http://www.astronomy.com/news/2016/10/cannonballs-shooting-from-star

https://en.wikipedia.org/wiki/V_Hydrae

Planets Around Failed Stars

Stars can (but don’t necessarily) have a family of planets surrounding them. Planets can (but don’t necessarily) have moons surrounding them. What about the so-called ‘failed stars’? Do they have anything as a family?

Jupiter is sometimes called a failed star. If it had just a bit more mass, fusion could start, goes the argument. Well, not really. It would take 13 Jupiters combined to have enough mass to reach the minimum needed for a brown dwarf, AKA failed star. Also, Jupiter was created within the disk of dust that surrounded our infant sun, which is how planets are made, not stars. Not even failed stars. So we can’t take any clues from Jupiter about the possibility of planets around dwarf stars.

Okay, so exactly what is a failed star? A close apparent brown-dwarf-type object to Earth is SIMP0136. It lies 21 light-years away and is 13 times the mass of Jupiter. Theoretically, it could be a brown dwarf. Brown dwarves form like other stars, but fail to get big enough. They may have some fusion of deuterium for a relatively short time inside them, but it doesn’t last. Any light they produce tends to be in the red and infrared spectrums, so despite being called brown dwarves, they would probably appear magenta or possibly red-orange. And the older the brown dwarf is, the more it cools and contracts, until it can seem to be just another planet. Scientists have recently decided SIMP0136 is just a planet, after all. A rogue planet, big enough and close enough for them to study its weather patterns.

It could have gone the other way. The size of brown dwarves range from a minimum of 13 Jupiter masses to a maximum of 80 Jupiter masses. If it managed to gather more than 80X Jupiter’s mass, it would have made it to actual stardom.

Because brown dwarves are a type of star, at least some of them do have a family of planets, such as 2M1207b and MOA-2007-BLG-192Lb. This makes sense, because brown dwarves form the same way as other stars, just in the middle of a smaller dust cloud. Once the center of the cloud collapses into a proto-brown-dwarf, the remainder of the cloud thins into a rotating disk of dust, which would normally form planets. It is thought that this disk would not extend far, since the entire cloud was small to begin with, so any resulting planets would be fairly close to the brown dwarf. It is also believed that these planets would be rocky, like Earth and Mars, rather than gas giants like Jupiter, because most of the gas would be taken by the brown dwarf. So, let's look at some known brown dwarf systems:

170 light years from Earth, planet 2M1207b orbits a brown dwarf. Its mass is somewhere between 3X and 10X that of Jupiter, and it orbits its primary at approximately the same distance as Pluto from our sun. Although there is some indication of water, it is not likely to be habitable.

Occasionally shortened to MOA-192 b, MOA-2007-BLG-192Lb is about 3,000 light-years away. This small planet is 3.3X Earth’s mass, and circles a small brown dwarf in an orbit approximately 2/3 the size of Earth’s orbit around the sun. It is believed to have lots of ice and gases, more like Neptune than Earth.

And then there’s the quadruplets: a small brown dwarf (2MASS J04414489+2301513, with a mass 20X that of Jupiter) has a companion (5X to 10X the mass of Jupiter) that could be either a planet or a sub-brown dwarf. There are also two other brown dwarves in close association. All four objects together only have 26% the mass of our sun, making it the quad system with the least mass. It is 470 light years away.

So yes, it is entirely possible - almost probable - that ‘failed stars’ will have planets. Or possibly siblings, as in the quad system.

http://www.iflscience.com/space/one-of-earths-closest-failed-stars-may-actually-be-a-rogue-planet/

http://now.space/posts/gas-giant-planets-small-failed-stars-is-there-a-difference/

https://en.wikipedia.org/wiki/Brown_dwarf

https://en.wikipedia.org/wiki/2M1207b

https://en.wikipedia.org/wiki/MOA-2007-BLG-192Lb

https://en.wikipedia.org/wiki/2MASS_J04414489%2B2301513

Kepler Keeps On Giving

When I heard, several weeks ago, that the Kepler Telescope was crippled, and it was stationed so far from Earth that repairs were not possible in the foreseeable future, I really got depressed. That's it, I thought. No more exciting news about newly discovered, exotic planets outside our solar system.

Last week, I was really bowled over with the news that scientists had discovered another 715 planets, including systems with more than one planet in them. When I read further into the article, they were announcing 715 planets circling 306 suns. So, just doing some simple math, one can see that in that batch, the average is about 2.34 planets per star. Of course, no one ever claimed that 'nature' could do even the simplest of math, AND Kepler may not have been watching long enough to see evidence of planets further out from their stars.

My head was starting to whirl at this point, but I believe that brings the total of planets discovered outside our solar system to a little more than 1,700. Now, remember, Kepler only stared at one tiny, tiny area of our galaxy.

And, perhaps the best news this article gave me - the scientists had only analyzed 2 years of Kepler's 4 years of data. I am all atingle, waiting for more information on what Kepler saw in its all-too-brief, 4 years of life.

New Planet Discovered

Scientists have discovered a new planet.

Ho hum. This has become so common-place, it isn't typically reported anymore. What makes this one newsworthy? ... It doesn't bother to have a parent sun.

That's right, it's just wandering around in space, about 80 light-years from us, with no sun, and no other symptoms of a 'planetary system'. In early science fiction, such a planet might be called a 'rogue planet'.

Since this rogue is not orbiting a star, they didn't find it in the usual way, either. The usual way, these days, is to observe the changes in the star's brightness to determine when a planet's orbit places it between that star and Earth.

The way they discovered this planet was by looking for Brown Dwarf stars. Brown Dwarf stars, as I understand it, are 'larger than a planet, but not warm enough to have ignited into a star.' While searching for large, cool masses, they discovered this rogue, which was even colder than the brown dwarfs they were looking for.

At this point, they don't know much about it; only that it doesn't orbit a star, it's about 12 million years old, and it's about 6 times the mass of Jupiter.

I wonder if it could be considered a tiny brown dwarf? When I was (much) younger, I seem to remember wild speculation that Jupiter was just a little too small to have been a 2nd sun in this system, and in 2010 (as I remember the movie) aliens added enough mass to Jupiter to get it to ignite into another sun.

Well, for now, it's a planet. Of course, its status could change. Pluto was once a planet, too. After all, it's not as if astronomy is an exact science.

The Outer Goldilocks Planet

Last week I took a more detailed look at Kepler-62-e, one of two Goldilocks planets discovered recently. Today I'll give a few thoughts to its sibling, Kepler-62-f, which is a little further from their star.

The article said 62-f might have a climate rather like Alaska. Again, I'm going to assume that means the temperate zone. And Alaska stretches from 51 to 71° North. The middle, then, is 61°, and if we move that down to 45° (the midpoint between the equator and north pole), we are moving 16°.

If you remember from last week, Barrow AK sits at 71° North, so moving its climate 16° south would put it at 55°. This would mean the Alaskan panhandle, northern Ireland and the middle of Scotland/England would have 8 months of temperatures below freezing, and its warmest month would have an average temperature of 47. Brrr!

The climate at the equator of this outer planet could be approximately what Earth has at 16° north or south. Brasilia, Brazil, is at 15 3/4° south, so I looked at its climate. The average temperature is about 69°F. The record low has been 32°F, and the record high has been 99°F.

So that sounds intriguing, doesn't it? Nicely temperate around the middle. I'm thinking, though, that it could be pretty snow/ice bound around the poles, and extending about 1/3 of the way to the equator.

The article did not offer any guesses about the ratio of water surface to land surface, and that ratio could definitely influence the climate. We could imagine whatever ratio we would like. If it's a pretty dry planet, there wouldn't be enough water to moderate the temperatures, so the cold temperatures might migrate even closer to the equator. On the other hand, with so little water available, the 'polar caps' might be only designated by temperature, or perhaps a dusting of snow, rather than the vast ice fields that Earth has.

It's a nearly-blank slate, then. We have a little sense of what the climate might be like, the rest of the details are left for us to imagine. I can work with that.

The Inner Goldilocks Planet

I've been thinking about those twin Goldilocks planets I mentioned last week. That article had more details that I found intriguing but hadn't included in last week's post. So this week, I'm going to explore that inner planet a bit more.

The article claimed the inner planet might have a climate reminiscent of Hawaii or of Washington DC in May. I have to assume they meant that would be the 'average', and most likely found in the 'temperate zone', roughly 30 to 60 degrees North and South of the Equator.

On Earth, Hawaii stretches from 18 to 28 degrees North. To move that climate to the middle of the temperate zone would be a shift of 21 degrees. What does that do to the rest of the planet's climate, compared to Earth?

So I looked up Barrow, Alaska, which is located at 71 degrees North. That town has temperatures below freezing about 8 months of the year, and during its warmest month, the temperature averages 47 degrees F. Now, if we move that kind of climate another 21 degrees North-- well, we get 92 degrees North, and planets only go up to 90 degrees North or South. So it's possible the Inner Planet would not have any permanent ice caps.

What about the equator? The temperatures Earth experiences at our equator would now be normal at 21 degrees North and South. The area of our equator is mostly tropical rainforest or ocean, with little variety in temperature (high 80s) around the year. And it rains. A lot. I tried to look up some cities approximately 21 degrees N/S, to see what kind of temperature differences occur in that 21 degree difference. Antofagasta, Chile has an average temperature of 63. (It also sits in a desert where the only 'precipitation' comes as a thick morning fog, but we'll ignore that.) That's a difference of about 25 degrees, so I extrapolate that the average equatorial temperature of the Inner planet might be around 113 degrees F. Yes, definitely warmer than us.

It was also hypothesized that this might be an ocean planet and that some type of 'flying fish' might have evolved into 'birds'. Of course, if there isn't any land, those birds would not be able to rest unless they were some type of water fowl.

None of that would keep us from colonizing, if we were at that stage. Cities, towns, even farms could be placed on floating rafts and left to drift on the currents. Or given some motors so they could move out of the way of approaching storms. There have been people here on Earth designing such structures, to be set loose on our oceans.

There's got to be a few stories in amongst all those ideas, don't you think?

Goldilocks Twins

A few days ago, I ran across an article about Keplar-62-e and Keplar-62-f, two planets slightly larger than Earth that are circling the same star (Kepler-62) and are both in the 'Goldilocks Zone'. The Goldilocks Zone is a band of space orbiting stars where the temperature allows a planet to have liquid water, and thus, it is assumed the planet could possibly support life as we know it.

Can you imagine what it would be like, to have another habitable planet in your solar system? In the case of 62e and 62f, their orbits are so close (closer than Earth and Mars) that one would be a little warm, the other rather nippy. It is speculated that the warmer one might feel like Hawaii or possibly DC in May, while the cooler one would be more like Alaska. I think we could probably find people willing to colonize both of those possibilities.

I have a story universe that deals with this possibility. I'm pretty sure other authors have postulated the possibility of 2 habitable planets in one planetary system, although I cannot name any off the top of my head. In my version, the inner planet is warm and fairly dry, kind of like eastern Colorado, and has an intelligent dominant specie. The cooler planet is more humid, with lush flora, maybe like Montana, and has no dominant intelligent specie.

The people of Planet 1 have no interest in space travel, and visitors from other planets are greeted coolly. There is no general interest in most of the merchandize offered by other planets. Occasionally an individual tribal chief might be intrigued by some trinket or another, and can be cajoled into exchanging a slave or two for that trinket.

But most of the civilized planets do not condone slavery. Accepting slaves is seen as a rescue, the former slaves are retrained and assisted to readjust to a new kind of life. And eventually, those former slaves gather together and colonize the cooler planet.

If I understand the Keplar numbering system correctly, there are 4 other planets in the Goldilocks twin system, discovered before these 'habitable' planets. Sibling planets of the twins, but assumed barren. Of course, there's always the possibility of life as we don't know it.

When Science Catches Up with Science Fiction

When I was young and first started exploring the universe through reading, science fiction was considered far more fiction than science. In those stories, ships routinely traveled throughout our own solar system and to planets far away that were either colonized by humans, had its own intelligent population, or both.

By now, people are aware that cell phones were inspired - at least in part - by the communication devices portrayed on the original Star Trek series. We also now have a space station orbiting Earth, as imagined by so many sf authors last century. And thanks to the Kepler telescope, we are becoming aware that our planetary system is not the only one.

In fact, the Kepler telescope has only examined a tiny fraction of our galaxy, and has already discovered thousands of planets, including some that are possibly earth-like, of the proper size in the ‘Golden Zone’, within the distance range from their star to support liquid water. They could be suitable for colonization. Or they might already have an intelligent species we could trade with. Whether we trade artwork and merchandise or bullet-equivalents remains to be seen.

It appears that when we are ready to start exploring outside our own solar system, there will be plenty of places for us to go, just like there were in all those sf books I read as a kid. Science is catching up with science fiction.

At the same time, science has created new branches to explore, which today’s sf writers are using as a springboard to create their futuristic tales. In a few more decades, we get to see science catch up with some of those stories.

I can’t wait.

One Planet With Four Suns

SF authors are not adverse to exploring alien planets. I remember a story that took place on a planet that had a severely elliptical orbit around its sun. I don’t remember details of the orbit, but let’s say it took this planet 100 Earth years to go around its sun once. For about 75 of those years, the planet was too cold to sustain life. Everything hibernated. As the planet finally approached the sun, things thawed out; people, plants and animals woke up and went about their business. They would have about 8 (of our years) of an ever-warming spring, an equally long hot, hot summer and then a gradually cooling autumn before they all hibernated again. Weird, huh?

A lot of planets these authors explore have multiple moons. Sometimes a colony would be on a world orbiting a binary star. I was as fascinated by reading about these unusual planets as the authors were in their exploration of them.

At that time, the existence of planets outside our own solar system was an unknown. These days, scientists seem to be finding them all over the place, and the assumption is that they’ve only seen the glint shining off the iceberg.

I was thumbing through the latest Discover magazine, which goes through the top 100 discoveries made in 2012. It states over 100 planets were discovered in 2012, and it had brief descriptions of 3 of them. The one that really caught my attention was PH1, which orbits a binary star. That was enough to make me remember the unusual planets I read about as a kid, but PH1 doesn’t stop there. PH1’s binary stars are also orbited by another binary star!

Try and imagine what days and nights would be like on PH1. I’ve tried, but my brain circuits tend to start sizzling after a while. To get you started, remember that 2 suns would be in the sky each day, although twice a year, one of those stars would be behind the other. The other two suns would be even further away, I assume, and I’m not sure how close they would need to be in order to be seen from the planet as ‘small suns’ and not just a pretty light. If they are seen as little suns, they would spend most of their time also in the daylight sky, perhaps disappearing behind the big suns, or being faded out by the light of the big suns. At regular intervals, however, the little suns would emerge from behind the big suns and move around to the night time sky for several years until they slipped back into the daytime again.

And that brings us to nomenclature and religion of any people living on PH1. Would they call it First and Second sunrise, First and Second sunset, with a special term for when the main suns appear to be merged? Would they have special terms for the ‘night suns’? Would the small suns be seen as ‘enemies’, sneaking behind the planet for nefarious means? What do you think?

I’m going to put this in a pot on the back burner and see if a story grows.

Conjoined Fraternal Twins

Conjoined twins used to be called ‘Siamese’ twins. They were connected somewhere; the chest, the hip, the top of the head. Sometimes they can be separated, but other times they share some vital organ that can’t be separated. Fraternal twins come from 2 different eggs, so the resulting babies are not identical.

But what I really want to talk about is this cool binary star system I heard about a few weeks ago. When you want to write science fiction, you have to try to keep up with science, so I dip into that huge pool of information every chance I get.

I already knew about binary stars. Two stars orbit some spot between them. But this particular binary star system had stars that were far closer than any that had been found before. Really close!

The stars were not identical; one was larger, the other smaller. That’s pretty common with binary stars, so let’s call them fraternal twins.

But when the astrophysicists studied the ‘output’ of this particular pair of stars, expecting them to have different brightness because of the difference in size, they found that the smaller star had the same corona signature as its big brother. These two stars are actually sharing corona matter! To me, that says ‘conjoined’.

Who would have ever believed that a pair of stars could exist so close to each other than they could share ‘skin’, and yet remain separate entities? Why doesn’t their mutual gravity make them merge into one star? They have to be racing around each other at a super speed in order for that outward force to counter-balance the gravity.

Now I’m wondering, ‘Are these stars still spheroid?’ Or are they mis-shapened by the horrendous forces they must contend with every second? And if they are mis-shapened, what shape are they? Teardrops with the points aimed at each other? Or are they oblate spheroids, spheres that have been squashed?

The neat thing about science is that it doesn’t just answer questions, it raises even more questions for you to ponder. I’m going to speculate about this particular pair of conjoined fraternal twins for some time.