Universe Today 5 Feb 2021, 19:19 UTC A galaxy’s main business is star formation. And when they’re young, like youth everywhere, they keep themselves busy with it. But galaxies age, evolve, and experience a slow-down in their rate of star formation. Eventually, galaxies cease forming new stars altogether, and astronomers call that quenching. They’ve been studying quenching for decades, yet much about it remains a mystery.
Starts With a Bang! 5 Feb 2021, 15:02 UTC The Big Bang is our accepted origin of the Universe. But is there another possibility?
Centauri Dreams 4 Feb 2021, 18:13 UTC Although it seems so long ago as to have been in another century (which it actually almost was), the first detection of an exoplanet atmosphere came in the discovery of sodium during a transit of the hot Jupiter HD 209458b in 2002. To achieve it, researchers led by David Charbonneau used the method called transmission spectroscopy, in which they analyzed light from the star as it passed through the atmosphere of the planet. Since then, numerous other compounds have been found in planetary atmospheres, including water, methane and carbon dioxide.
Discover 4 Feb 2021, 15:45 UTC Scientists suspect it might be raining diamonds on Neptune and Uranus. Evidence of opal on Mars hints at a watery past. Outside our solar system, there may be rubies and sapphires too. But the gems that form within Earth still might be the most dazzling.
Starts With a Bang! 3 Feb 2021, 15:02 UTC Think there are habitable super-Earths out there? Think again.
Bad Astronomy 2 Feb 2021, 14:00 UTC Compared to our usual human notion of time, the Earth is old: 4.5 billion years, give or take a few dozen million. The Sun formed a tad bit earlier, and is about 4.6 billion years old. We know of stars older than ours, though. Do they have planets, too?
Universe Today 2 Feb 2021, 02:54 UTC Galaxy mergers are beautiful sights, but ultimately deadly. In the midst of the collision, the combined galaxy will shine brighter than it ever has before. But that glory comes with a price: all those new stars use up all the available fuel, and star formation grinds to a halt.