전체 글31 Why McGetchin Crater Is 16°F Colder at Night—A New Scar on the Moon McGetchin crater is surrounded by a four-mile region that turns 16°F colder at night. Here is what the Moon’s new thermal scar reveals.NASA discovered a newly formed crater on the Moon measuring 728 feet across. Yet its size was not the part that surprised me most.At night, the ground around the crater becomes about 16 degrees Fahrenheit colder than the surrounding lunar surface. This cold regio.. 2026. 9. 18. Curiosity Found 1-Centimeter “Footprints” on Mars—What Made Them? Curiosity found 1-centimeter pits resembling footprints on Mars. See what NASA observed, how the rover studied them and what remains unexplained.At first glance, they look like tiny footprints pressed into the surface of Mars.My first reaction was the same as many readers’: What could have left them?Then I noticed their actual size.One example photographed by NASA’s Curiosity rover is only about.. 2026. 9. 17. Elias 2-24 b: Why the Youngest Known Planet Grew So Fast Elias 2-24 b is under one million years old but already has Jupiter’s mass. Why did the youngest known planet form much faster than expected?Astronomers have confirmed the youngest known planet.Its name is Elias 2-24 b. It is less than one million years old but already has roughly the mass of Jupiter.That creates a problem: according to current models, a giant planet this distant from its star s.. 2026. 9. 17. 84 Hypersoft X-Ray Sources Were Hiding in Chandra’s Archive Chandra archival data revealed 84 hypersoft X-ray sources that may help astronomers identify hidden stellar systems and possible Type Ia supernova progenitors.They were bright enough to rival some of the most energetic objects in nearby galaxies.Yet astronomers had largely missed them.A new study of archived data from NASA’s Chandra X-ray Observatory has identified 84 unusual objects in six gala.. 2026. 9. 16. Oxygen on an Exoplanet? Why It Would Not Prove Alien Life Oxygen in an exoplanet atmosphere would be exciting, but it would not prove life. Natural processes can produce the same apparent biosignature.Many readers would understand that as “alien life discovered.” Scientists would be excited too—but they would not make that leap.Oxygen could be an important biosignature. It could also be a convincing false alarm.Why oxygen attracts attentionMost of the .. 2026. 9. 14. Mars or K2-18b: Which Alien-Life Evidence Did Scientists Trust More? Mars and K2-18b both show possible signs of alien life. A 2026 survey reveals which evidence astrobiologists trusted—and why most remained skeptical.Imagine that two sealed evidence boxes arrive at the same laboratory.The first contains data from a distant planet 124 light-years away. Its atmosphere may hold a gas that, on Earth, is closely associated with living organisms.The second contains im.. 2026. 9. 14. 이전 1 2 3 4 ··· 6 다음
