An asteroid is on its way to Earth, but don’t worry – the end is here Not here. The asteroid, named 2023 BU, is about the size of a van and is expected to miss our planet during Thursday’s flyby. However, according to a NASA scientist, it will be “one of the closest approaches of a known near-Earth object ever recorded.”
Since the Hayabusa2 returned with the sample from the Ryugu asteroid in December 2020, several important discoveries have been made – most notably analyzes confirming the presence of substances thought to be the building blocks of life on the asteroid, such as liquid water and organics fabrics.
Hayabusa-2 took several years to land on Ryugu (literally “Dragon Palace”), pound out just over 5 grams of asteroid material, and bring it back to Earth (landing in Australia in late 2020).
NASA scientists have confirmed not just frozen water but liquid — inside crystals called pyrrhotites. JAXA scientists (pictured above with Prof Tsuchiyama of Ritsumeikan University, my main employer!) continue to check the density of the samples.
The water is similar to the carbon dioxide-laden water of hot springs. The research teams have already discovered over 20 amino acids, the basic protein building blocks of carbon-based life.
Another theory called “panspermia” proposes that a key mineral (boron) missing on early Earth came in an asteroid from Mars. ☄️ Hmm. Did Mars produce asteroids? Or more like asteroids hit Mars and broke off lots of tiny fragments? That somehow survived the journey to Earth?
Seems a little unlikely. But there is now evidence that at least some proteins came from space rocks.
So, sorry, Ridley. This isn’t how it happened. Cool movie, though.
Maybe it’s because most of my students (to the order of 90%) come from medium and large cities. To me, having grown up in a mostly rural area (in elementary school, my town had about 400 residents and in junior and senior high I lived in a “queen village” that had — gasp — an incredible 4,000 residents) — well, being surrounded by darkness was no big deal.
We could see stars from our backyard. Lots of stars. We learned all the major constellations (of the Northern Hemisphere, anyway, since that’s what we could see).
And more importantly we could see lightning bugs (or “fireflies” or “glowworms” or “candle bugs” etc). Decreasing water quality is thought to contribute to their declining numbers, but it’s far more likely that our insistence on lighting up the skies all the time are preventing them from finding a mate (hence the reason they “flicker” at night).
Though definitions sometimes differ, cislunar space generally refers to the space between Earth and the moon, including the moon’s surface and orbit. Any nation or entity that aims to establish a presence on the moon, or has ambitions to explore deeper into the solar system, has a vested interest in operating in cislunar space, either with communication and navigation satellites or outposts that serve as way stations between Earth and the moon.
The feat, which involved firing powerful laser pulses at thunderclouds over several months last year, paves the way for laser-based lightning protection systems at airports, launchpads and tall buildings.
This installment is a bit longer than anticipated, so I will cut it into two parts. Metaphorically. Just like the Artemis crew will need to, following their agreement with the Mars colonies faction heads to train the afflicted settlers in controlling their odd new powers and sensations while assisting in distribution of temporary water and food supplies. Only Martin, the former Mars UN Overseer, who thinks he can manipulate the situation, is about to find out things are proceeding far faster than he planned. And Luna Base has a nasty surprise in store for Mars…
The storeroom chambers were nearly full by now. It had taken several days, but at last the food and water brought from Ceres had been stacked neatly, carefully portioned and labelled for each settler division. Orders were sent to each settler node requesting two or three representatives to bring their respective robotic platform dollies to the main supply chamber.
Cooper strolled casually along one earthen wall, rubbing a hand against the soil. He could feel the regolith composite materials, sense the minerals and hydrocarbon content. It would be so easy to extract and solidify what they needed, strengthen the structure. Or dig even deeper below the planet’s surface.
“Here,” Martin said, handing a pad to Cooper. “I’ve authorized the complete list of supplies brought by the Artemis. There’s my thumb verification, at the bottom.”
Cooper accepted the pad. He scrolled up to verify, nodding. “That should do it.”
“Now,” Martin said, addressing both Artemis crew members with him. “I’d like to find out what happened to my security chief, Hamels. She was outside the airlock when you dropped the ditrium on the ice cap.”
“First things first,” Enoch said. “We’d better make sure that the quantum teleportation nodes from Luna are severed.”
Martin turned pale. “That would seem a bit, er, final, wouldn’t it?”
Enoch grinned. “You bet. And necessary. Who knows what might come through the next time the UA turns the system on again?”
The geist spread his hands wide and made a booming sound, then laughed. The tall spacer slapped his crewmate on the shoulder, then both laughed hysterically for a moment. Martin stared at them. Cooper couldn’t help doubling over again, holding his stomach.
The “new” rock is apparently a meteorite that fell to Earth at least 100 years ago (or more, depending on how you define a “generation”). The two newly-identified minerals are being called “elaliite” (after El Ali, Somalia) and “elkinstantonite” (after NASA planetary evolutionary expert Lindy Elkins-Tanton).
And there’s still one more as-yet-unidentified mineral in the 70-gram rock fragment at the U of Alberta (the original is about 15 tons, and is reported to be the 9th largest such meteorite to have survived entering the Earth’s atmosphere). These three minerals evidently do not exist naturally on Earth. Makes you wonder how many other such minerals are still floating around in space.
And of course, how they might be used to make incredibly strong yet flexible spacecraft materials. (FWIW NASA was already talking about “new” materials such as carbon nanotubes and self-healing piezoelectronic “skins” some twenty years ago…)
Now, maybe it’s just me, but I have a feeling that a 15-ton rock falling into the desert would have raised all sorts of hell. At least locally. Nothing like a 143,000 ton rock, of course. Is there really no record of this thing falling out of the sky? Maybe it’s time to talk to non-European communities and to take their oral legends a bit more seriously.
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