Speedy Space Object

It’s always good to know that our defense systems work.

On July 6^th, (I believe it was in 2024, but I could be wrong), automated systems that study the skies for potentially hazardous objects sent out a warning. Estimated at about 164 ft (50 m) in diameter, the object was spotted hurtling towards Earth. Its path would take it uncomfortably close to the moon and our planet. However, it was not an asteroid.

As objects move through the sky, different observatories identify whether it’s a new object and if it might pose a hazard to Earth. Follow-up observations determined that the object was actually the European Space Agency’s Juice (Jupiter Icy Moons Explorer) spacecraft. The probe was flying by Earth and the moon to exploit gravity as it slingshot through space.

But the Juice spacecraft isn’t 50 meters across. Its solar panel wings measure only 27 meters (88 feet), which is quite big for a deep space probe. Because it appeared very bright, owing to its reflective solar panels, the automated system initially estimated the object was a larger rock.

Scanning the skies for menacing objects is important. It gives us time to prepare and evacuate a certain area, if that’s necessary. Scientists agree that we need to know what’s coming, when it’s coming, and how hard it’s going to hit.

Space rocks do veer into our area of the solar system from time to time. But there are no known asteroids on course to collide with Earth for at least the next 100 years.

Even relatively small rocks are still threatening, as proven by the 56-foot (17 meters) rock that exploded over Russia and blew out people’s windows. Every year, on average, an automobile-sized asteroid plummets through our sky and explodes. Objects about 460 ft (140 m) in diameter occur every 10,000 to 20,000 years. And a ‘dinosaur-killing’ impact from a rock a half-mile across or larger happens on 100-million-year timescales.

Just to ease your mind, the dinosaurs went extinct about 66 million years ago.

 

https://www.msn.com/en-us/news/technology/speeding-space-object-triggered-a-warning-it-wasn-t-an-asteroid/ar-AA1oUdjf?ocid=mailsignout&pc=U591&cvid=31d76d4fc57b4ec7828d859661209820&ei=30 

Poor Science or Poor Writing

The other day, my husband and I watched a movie we’d never heard of. The setting of the story was that Earth had been in winter for the past 300 years, and it would continue for thousands of years. The only humans that still existed lived 10 kilometers under the surface, where they used geothermal energy as their power source. They had created a race of ‘humans’ to do their work for them, including sex workers, but nobody ever indicated what type of work this ‘inferior’ race did, except for the one sex worker.

Hubby had difficulty with Arizona being covered in snow and ice, with daytime temperatures of -60° F. In the latest ice age, the glaciers never reached the sw states. To me, that said the the earth was not just in an ice age, but had entered a ‘snowball earth’ ice age, where the entire globe is frozen.

How did the ice age winter begin? The characters gave 2 theories, but didn’t know which was right. The first theory was that an asteroid had struck the earth, throwing up so much dust and debris into the atmosphere that most of the sunlight couldn’t get to the ground. The second theory was that it was a bomb that threw up all that dust and debris.

Okay, yes, a lot of dust and debris in the atmosphere can reflect enough sunlight to produce some very chilly results. Large volcanos can produce enough dust to chill the entire globe as the dust rides through the atmosphere. BUT, such dust doesn’t stay in the atmosphere for hundreds or thousands of years.

What about the asteroid that ‘killed the dinosaurs’? you may ask. Yes, that threw up a lot of dust and debris. But what killed so much of the flora and fauna was the firestorm produced by the heat released when the asteroid hit. Think of it as a huge explosion, so hot the heat wave raced around the globe, burning almost everything it touched. There may have been a long winter afterwards, but all that dust and stuff did settle out in a fairly short amount of time.

The plot was that a squad of ‘normal’ military-type humans had to go out into the world to track down a renegade ‘inferior’ made human. The squad's DNA was changed to allow them to survive in the far-below-zero temperatures, but that would only last for 48 hours. I had a little trouble accepting that, but... okay, let’s see what they do with it.

The scene that got me was right after they arrived on the surface. It had been stated that ‘all the animals’ were gone. But what they see right after they arrive on the surface was a man fishing. He had chopped a hole in the top of a small rivulet of water racing over the snow/ice, and had actually caught a fish, but seeing that he was going to be interrupted, he put the fish back.

I really couldn’t accept that. If all the animals had died, where did this fish come from? Okay, maybe they were mistaken. But at the temperatures they were talking about, I would expect that little rivulet to be frozen solid, and the fish with it.

It didn’t help that long after the main character had been on the surface for 48 hours, the main character was still chasing the renegade, with his head bare and no gloves. Frostbite was completely ignored.

It was not a good movie. If you are going to change the rules of life (daytime temperatures of -60F), then you (the writer) have to follow those new rules. And it is easy to have characters who don’t know what happened to end the civilization we (the audience) are familiar with. It’s easy for the writer, but it’s not satisfying to the audience.

Science Quiz

For 7 years, I’ve tried to ‘update my science [knowledge].’ I’ve always wanted to write science fiction, but my last science class was a quarter century ago, the one before that in 1970. I’d been busy working full time, raising kids, and so on. So when I retired and started writing science fiction, I found the vast research I did – and the results produced – shot huge holes in my time, the story background, and the plot I had picked.

Therefore, I subscribed to magazines, watched science and history documentaries, did other ‘educational’ things. I love to learn but… have I caught up? Am I ready to write science fiction?

Last week, I received the Jan/Feb 2017 issue of Discover. It includes a list of the ‘Top 100 Stories of 2016’. As I read through some of this list and the entry for each article, I realized I was not familiar with everything listed. Have I failed?

I decided to keep track of which stories I had and had not already heard about. Now, I don’t get to read a magazine in one sitting, so as of today, I’ve only gotten to #40. Don’t worry, I will finish this issue, but in the meantime, how many of these 40 items had I already learned about before this issue?

First, the ones I had no knowledge of:

#4. Oldest Human DNA Revises Our Family Tree (I’d heard of Neanderthals & Denisovans, but not this particular story)

#5. Biologists Create Organism with Smallest Genome

#9. New Particle Fizzles, Leaving Physicists to Soul Search

#10. Did Lucy Fall and Not Get Up? (I knew about Lucy, but this was a new hypothesis that she died by falling out of a tree.)

#11. Bangladesh Sits Atop Potential Major Quake Zone

#12. Big Data May Lead to Earlier Alzheimer’s Diagnosis

#18. Electrons ‘Split’ in New Form of Matter

#19. Science in a Post-Brexit World

#22. NIH Proposes Lifting ‘Chimera’ Research Ban

#23. Picky Primes (Prime numbers are not as random as believed.)

#24. Finding China’s Great Flood

#27. Battle for Access (Should scientific papers be available to all, or only those who can afford to subscribe to scientific journals?)

#28. A Bone to Pick about Philistines

#29. Go, Go AlphaGo (Computer learns game, beats human champion.)

#31. Pushing the Limits of Life in the Lab

#32. Disrupting Dopamine Dogma

#35. Mathematicians Find the Answers (I was unaware of this question.)

#36. T. Rex Evolution: Smarts First, Size Second

#37. The Rise and Fall of Theranos (Fake medicine exposed)

#39. Plenty of Room at the Bottom (Saving data with chlorine and copper)

#40. Pluto’s Hidden Ocean (I knew it had one, but this article is about how it’s freezing, breaking Pluto apart.)

And the ones I was familiar with:

#1. Einstein’s Ripples in Space-Time

#2. Earth’s Surprise Neighbor Hints at Exoplanet Abundance (planets of Proxima Centauri)

#3. A New Enemy Emerges (zika and mosquitoes)

#6. The Pace – and Problems – of Climate Change Accelerate

#7. Can America Avoid Another Flint?

#8. Looking for Planet Nine

#13. Persistent Heat Decimates Coral Reefs

#14. The Ozone Hole is Finally Healing (Still has a long way to go.)

#15. More Hobbitses, Prescious! (More remains of hobbit-sized hominids found.)

#16. We Are All Africans

#17. The Falcon Has Landed, Now SpaceX is Eyeing Mars

#20. Ceres Hosts an Ice Volcano

#21. Regulating the Brave New World of Human Gene Editing

#25. The End of the Periodic Table? (How many more elements can scientists make?)

#26. Drug Couriers for Brain Injuries

#30. Crowdsourced Study Pinpoints Depression Genes

#33. Planets of the Milky Way

#34. Superbug Arrives in the US (Bacteria not deterred by any known medicine.)

#38. A Sharp Find (Ancient sword found in Denmark)

How did I shape up? Hmm, 21 stories I did not know; 19 I was semi-familiar with. If I were in school, that would be less than 50%, a solid F. But, I can’t know everything, so I don’t feel bad. Besides, some of these articles have hinted at background knowledge or even a story plot. I am stoked!

What have you learned in the past 7 years? I bet it’s a lot, whether science or not.

Any More Out There?

Okay, did I manage to discover anything about more potential dwarf planets? With most (except Ceres) so far from us, scientists often have to piece together bits of information from several different sources. Even Hubble telescope doesn’t do them much good, because all it showed of Pluto (the biggest dwarf) was a fuzzy blob. So, let’s see what they’ve jigsawed together so far:

2007OR10

It doesn’t have a name yet. But those who discovered it think they are close to deciding on one.

The designation means it was discovered in 2007, but it was only recently discovered that it was much bigger than originally thought. It is the 3rd largest dwarf, right behind Pluto and Eris, at a diameter of 955 miles [1535 km]. Its surface is very dark (the better to soak up what little sunlight it gets?) and reddish, and it rotates slowly - one day there is just under 45 hours long. They think it might be covered in volatile ices of methane, carbon monoxide and nitrogen.

OR10 has an elliptical orbit, which seems to be in fashion, that brings it close to Neptune’s orbit, but it is currently twice as far from the sun as Pluto. How far out does it go? I don’t think they’ve figured that out yet. I found no indication how long it takes to complete an orbit around the sun.

But if you really want to know the weird part about OR10, NASA’s information page stated there had been a hint of vegetation on its surface. What do you think? Some kind of lichen or what? I don’t think palm trees would grow there very well.

2015 RR245

Again, no name yet. It was discovered in 2015. The animation I found about its orbit shows that it gets to Neptune’s orbit, but then skedaddles far, far away, taking 700 years to make one trip around the sun. Its size is 435 miles [700 km], so it’s not a huge dwarf. It will make its closest approach to the sun on this trip in 2096.

Sedna

What little I found on Sedna was mostly from 2004. (You’d think they would have found out more by now.) When it was discovered, Sedna was 8 billion miles [13 billion km] from Earth, 3 times as far as Pluto. It’s red, thought to be about 1,400 miles [2,250 km] in diameter, and there is some evidence it has a moon. It takes 10,000 years to travel around the sun. It’s very bashful, though - maybe that explains its blush? It will get slightly closer in the next 50 years, but still won’t be anywhere near Pluto when it starts heading back for the Inner Oort Cloud. (Strangely, the Oort Cloud was described as ‘hypothetical’, but it shows up on all my star navigation charts.)

Quaoar

Discovered in 2002, Quaoar (pronounced kwa-whar, the name of a Native American god) lies 621,372,292 miles [1,000,000,000 km] beyond pluto in a circular orbit. Maybe it hopes to grow up to be a ‘real’ planet. It has a ways to go, with a diameter of 808 miles [1300 km]. Quaoar is also known as 2002 LM60.

I’d actually forgotten about Sedna and Quaoar, it had been so long since they had been in the news. That’s all I’ve got this week. If you still haven’t heard enough about dwarf planets, try the website http://web.gps.caltech.edu/~mbrown/dps.html , which is updated daily by Mike Brown, an astronomer who seems to be right in the midst of discovering a lot of them. Some of it may be over your head (it certainly was for me), but check it out: as of 10/16/16, he listed 10 nearly certainly, 30 highly likely, 75 likely, 147 probably, and 695 possibly dwarf planets.

Wow! What a big family!

http://www.jpl.nasa.gov/news/news.php?feature=6509

http://www.space.com/33387-dwarf-planet-discovery-2015-rr245.html

http://www.nasa.gov/vision/universe/solarsystem/planet_like_body.html

http://www.space.com/25695-sedna-dwarf-planet.html

https://science.nasa.gov/science-news/science-at-nasa/2002/07oct_newworld

Cheaper by the Dozen

When I was young, our solar system had 9 planets. It was a nice big family, which seemed to be fairly popular back then. And then, not long ago, tragedy struck; Pluto was demoted to ‘dwarf planet’.

On the other hand, our solar system family grew, because several other ‘dwarf planets’ were also named; Ceres in the asteroid belt, and Eris, Haumea, and Makemake in the Kuiper Belt. So right now, our solar system has 13 ‘planets’. A baker’s dozen! This year, 2 probes checked out 2 different dwarf planets, and the stuff I’ve been hearing is absolutely amazing!

Let’s start with Ceres, because it’s the closest to us. It’s only a hop past Mars.

I’m not sure I even heard of Ceres before it became a dwarf planet. Discovered in 1801, it was named a planet, then other asteroids were found in that belt, and Ceres became just another asteroid. And nobody really paid the asteroids any attention. The most respect they got was when a science fiction author included a nail-biting scene when his space ship had to negotiate the asteroid belt on its way to the outer system. Other ships might meet their doom in ‘the belt’, but not the ship the hero was on.

How would a scifi author treat Ceres now? It’s the smallest dwarf planet/biggest object in the asteroid belt. Would it be mined, like some think the asteroid belt would be? Would there be a base there? Do we know of anything important about Ceres?

Yes, we do.

Ceres has water.

No, Ceres doesn’t have rivers or oceans. But it has water and some kind of salt.

Scientists know this because of Ahuna Mons, one of the bright spots that dots Ceres’ surface. On Mars, Olympus Mons is a huge mountain. Ahuna Mons is Ceres’ biggest mountain. The probe, Dawn, took pictures to map Ceres’ surface, and they show that Ahuna Mons reaches approximately 3 miles in height. If someone wanted to drill straight through, from one side to the other, they’d have to drill for 12 miles. Walking completely around this ‘big bump’ would be a trip somewhat more than 36 miles.

Its slopes are steep and shiny. The top isn’t a point—more like a plateau with cracks.

It’s a volcano. But it doesn’t spew out molten rock; Ceres is too cold. Evidence indicates it spews a thick slush of water, salts and mud. And it’s geologically new - only a billion years old.

There are other bumps on Ceres; older slush volcanoes that are eroded and pocked by collisions. Now, your word for the day is cryovolcano, which is a slush volcano.

Can’t you see it? Our space-faring descendants taking a road trip to Ceres for a refreshing salty mud slushey. Umm, Yummm. I can almost taste it now!