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ScienceDaily: Space & Time News |
| Moons may yield clues to what makes planets habitable Posted: 01 Feb 2022 11:40 AM PST Earth's moon is vitally important in making Earth the planet we know today. Because the moon is so important to life on Earth, scientists conjecture that a moon may be a potentially beneficial feature in harboring life on other planets. Most planets have moons, but Earth's moon is distinct in that it is large compared to the size of Earth. |
| Posted: 01 Feb 2022 11:39 AM PST Astronomers have confirmed the existence of the second Earth Trojan asteroid known to date, the 2020 XL5, after a decade of search. |
| Even dying stars can still give birth to planets Posted: 01 Feb 2022 04:45 AM PST Planets are usually not much older than the stars around which they revolve. Take the Sun: it was born 4.6 billion years ago, and not long after that, Earth came into the world. But astronomers have discovered that a completely different scenario is also possible. Even if they are near death, some types of stars can possibly still form planets. If this is confirmed, theories on planet formation will need to be adjusted. |
| What the rise of oxygen on early Earth tells us about life on other planets Posted: 31 Jan 2022 01:15 PM PST When did the Earth reach oxygen levels sufficient to support animal life? Researchers have discovered that a rise in oxygen levels occurred in step with the evolution and expansion of complex, eukaryotic ecosystems. Their findings represent the strongest evidence to date that extremely low oxygen levels exerted an important limitation on evolution for billions of years. |
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