solar system | M Thomas Apple Author Page

3I/Atlas coming to a planet near you!

December 19, 2025
MThomas

3I/Atlas. Not a real photo. Also, not aliens. Sorry.

https://www.space.com/news/live/interstellar-comet-3i-atlas-closest-to-earth-flyby-week-dec-18-2025

Discovered on July 1 by the NASA-funded ATLAS telescopes in Chile, 3I/ATLAS is only the third confirmed interstellar object known to have passed through our cosmic neighborhood, following 1I/‘Oumuamua in 2017 and comet 2I/Borisov in 2019. Its trajectory shows that it originated from beyond our solar system and will eventually travel back into interstellar space.

https://www.space.com/astronomy/comets/interstellar-comet-3i-atlas-makes-its-closest-approach-to-earth-on-dec-19-heres-what-you-need-to-know

Of course, Avi Loeb has already claimed (once again) that an interstellar comet is an “alien probe.”

And naturally, other astrophysicists immediately refuted him. Again.

It’s fast. REAL fast. So fast that even as it entered the solar system it was traveling the distance from the Earth to the Sun in only a month, and then it began to pick up even more speed (from the Sun’s gravity, NOT from “jets out the back” or whatever else unscientific SF fans say online).

Of course, we can assume that the aliens’ spaceship will detach from it precisely during its approach to Mars, or during its passage through perihelion when we cannot see it. In this case, it will have to slow down by more than 20 km/s.

And even so, this will not help the aliens much, because the trajectory will remain retrograde relative to the direction of the planets’ rotation around the Sun. So, if the aliens who flew to us billions of years ago have a plan that is a little more complicated than becoming kamikaze pilots, they will have to slow down again, spending a lot of energy on it. And the aliens still need to get that energy from somewhere.

So, most likely, we should not expect any extraterrestrial visitors at the end of the year. And we will not be able to admire the interstellar comet itself. By the time it emerges from behind the Sun, its brightness will already be approximately 11 stellar magnitudes, meaning it will be inaccessible even to small amateur instruments, let alone the naked eye.

So, nah. Sorry.

–> LIVESTREAM from 11 p.m. EST December 19th here: https://www.space.com/astronomy/comets/watch-interstellar-comet-3i-atlas-make-its-closest-approach-to-earth-in-free-livestream-on-dec-18

(FWIW, the last two sentences are NOT supposed to be quotes, but wordpress is quite frankly broken.)

Geminids, Geminids, Geminids!

December 15, 2025
MThomas

It’s been several months since I last posted…too much work and no play!

Until this past Sunday. Whew.

After a morning lecture about ancient Japanese myths and “deliberately forgotten” kings (maybe), I was grateful to be able to take a quick power nap…

…so that the family could go up a nearby mountain and watch the Geminid meteor shower. (By “mountain,” I mean about 640m/2100ft.)

After a brief lecture/quiz by a staff member at our local culture center, we stayed outside, lying flat on the ground, for over an hour. And, yes, it was cold, despite the sleeping bag and thermal underwear. I saw three shooting stars. Not nearly as many as I’d hoped.

After we got home and took evening baths, the kids went out on our second-floor balcony and found out that the night view was even better at home than on top of a mountain! At least they knew what to look for, thanks to the culture center event.

Although the peak is Sunday night between midnight and 2 a.m., the meteors are still visible to some degree the rest of this week.

And by “meteor,” I mean the size of grains of rice. Look to the eastern sky, just a bit to the northwest of Orion, to find the Twins (Castor and Pollux in Greco-Roman mythology).

For more on the origins of the Geminids, check out the JAXA mission to Phaeton, the parent body asteroid. It’s DESTINY!

Life on Trappist 1e?

September 12, 2025
MThomas

In two separate papers published Monday in the Astrophysical Journal Letters, astronomers zeroed in on the TRAPPIST-1 system, which consists of seven rocky planets that orbit a single star. Both studies outlined initial results from observations by NASA’s James Webb Space Telescope, suggesting that one planet in particular, known as TRAPPIST-1e, may have a nitrogen-rich atmosphere like Earth’s, though follow-up studies are needed to confirm the discovery.
https://www.nbcnews.com/science/space/trappist1e-atmosphere-extraterrestrial-life-planet-earth-conditions-rcna229839

Trappist 1e is in the “Goldilocks zone” in orbit around its star (i.e., not too cold, not too hot, just right). However, the Webb telescope can’t determine whether its atmosphere has any carbon dioxide, hydrogen, or oxygen, only nitrogen. Yet nitrogen is a clear sign that life is possible, because without nitrogen, DNA and other proteins are not possible. Of course, it could be simply a whole lot of microbes. Or even just ammonia.

Closer to home, the Mars rover Perseverance has found evidence of life in the distant past. Maybe. It found evidence that certain rock features may have happened because of microbes.

May.

That’s how science works, folks. A whole lot of maybes.

(I still think we need more catchy names for the Trappists. I mean, come on.

Get ready for the great planetary alignment February 28th!

February 27, 2025
MThomas

The best day to see all seven major planets (yes, you read that right, all seven!) is Friday, February 28th.

The link will describe (and give pictures) of where to find them all in the night sky.

Finding Orion is the key to most of them. Knowing where the Pleiades are helps, too.

The next time this “parade” appears will be 2040, so fingers crossed for clear skies!

https://www.skyatnightmagazine.com/news/seven-planet-parade-28-february-2025

Gas…stations…in…space…! ⛽️

November 13, 2024
MThomas

Jas Tiruvuru, business development manager for Orbit Fab in the UK and Europe, said the company was aiming to successfully demonstrate the technology in space by 2027.

“This will essentially be the first ever satellite to satellite refuelling demonstration funded here in the UK,” she said.

“Once we’ve proven that we can refuel to two spacecrafts we’ll be able to unlock a huge market potential.”

https://www.bbc.com/news/articles/c5y3wzlvnn2o

You know, maybe it’s just me, but I think 2027 may be a little optimistic. Just like the figure given in the article for how much the satellite sector will be worth in the future.

Aren’t there too many satellites already?

I’d like to see how this would help us colonize the solar system.

Actually, I’d like to see how they plan to get fuel up there in the first place.

Maybe my novel’s idea of using certain moons of Jupiter or Saturn as giant space gas pumps might help? 🪐

A taurid of meteorites now…

November 12, 2024
MThomas

The Taurids meteor showers get their name because the shooting stars appear to stream from a point in the sky where the Taurus constellation is located. Taurid meteors can be seen from pretty much anywhere on the planet except the South Pole.

https://www.nbcnews.com/science/science-news/meteor-showers-taurids-orionids-leonids-november-shooting-stars-rcna177143

I waited too long to post this! The meteor shower peaked last week, but might still be visible. The Orionids ended already (they appeared to fall from, you guessed it, the constellation of Orion, while the Taurids came from Taurus.

If you can’t see them, not to worry: the Leonids are on their way from next week (falling from, right again, Leo).

Very imaginative, these names. At least it makes them easier to spot. ☄️

Japan launches world’s first wooden satellite

November 12, 2024
MThomas

Researchers at Kyoto University who developed it hope it may be possible in the future to replace some metals used in space exploration with wood.

https://www.bbc.com/news/articles/c5y3qzd5ql9o

The researchers argue that “if” trees could be planted on Mars…

OK, just stop right there. I’m pretty sure Mars will struggle to support even grass, let alone trees.

And the argument that, due to a lack of oxygen, flammable wooden structures in space would not be in danger strikes me as a bit ludicrous…surely there would be oxygen inside the wooden structures?

And, you know, I do think I’ve seen this before some where…nah…

That’s no mo…why, yes, it is…

October 7, 2024
MThomas

The scientists hope to learn about the asteroid’s surface composition and how fast it rotates, he said. Those observations could help researchers figure out its origin, which in turn could shed light on other asteroids, including ones that could be dangerous to Earth.

https://www.nbcnews.com/science/space/mini-moon-asteroid-to-orbit-earth-temporarily-rcna172264

This is of course not the first “mini-moon” to have been discovered. These are wandering asteroids that get trapped briefly by Earth’s gravity well before being flung back into space.

Read the article for more information about the “school-bus sized” 2024PT5!

Interstellar! If only…

September 26, 2024
MThomas

According to Thorne, who served as a consultant on the science of Interstellar, quantum mechanics could hypothetically explain a way to time travel via wormhole. So far, it’s a thought experiment that leads to the conclusion that you’d lose information along the way—not very practical.

First off, I’m incredibly annoyed at the way WordPress has screwed up the “quotation” function. It seems they are more focused on encouraging bloggers to use AI to write.

Uh. I don’t need AI. I blog. The end. WTH is the point of using AI to write my thoughts? It’s already being trained to USE my blog in the first place! Idiots.

OK. Second, the Popular Mechanics article I’m linking to is entitled “Interstellar travel is possible if we break into a higher dimension, scientists say.”

Only, that is NOT what scientists say. It’s still a thought experiment!

Chinese scientists “create” water from lunar soil

September 4, 2024
MThomas

Using the new method, one metric tonne of lunar soil will be able to produce about 51 to 76 kilograms of water, equivalent to more than a hundred 500-millileter bottles of water, or the daily drinking water consumption of 50 people, the state broadcaster said.

https://www.nbcnews.com/science/space/chinese-scientists-use-lunar-soil-produce-water-rcna167951

The soil was from the 2020 expedition, which was the first in 44 years to bring back soil from the Moon.

Considering all of NASA’s problems, it looks like China will have a moon base years before the US does…and probably in prime resource locations as well.

And don’t forget that the hydrogen in the soil can also be used for rocket fuel. It would be a lot easier to launch ships to Mars and beyond without having to deal with Earth’s gravity…

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