保护地球，探索宇宙，发现文明
2023年6月30日 Orbits of Potentially Hazardous Asteroids Illustration Credit: NASA, JPL-Caltech Explanation: Are asteroids dangerous? Some are, but the likelihood of a dangerous asteroid striking the Earth during any given year is low. Because some past mass extinction events have been linked to asteroid impacts, however, humanity has made it a priority to find ...
天文学家利用NASA的詹姆斯·韦伯太空望远镜发现了一个由10个星系组成的丝状排列，这些星系在大爆炸后8.3亿年就存在了。
Teams install the heat shield on the Artemis II Orion spacecraft at NASA’s Kennedy Space Center in Florida on June 22, 2023. The 16.5-foot-wide shield will ensure the safe return of the astronauts on board as the spacecraft travels at speeds of about 25,000 miles per hour and experiences outside temperatures of nearly 5,000 degrees Fahrenheit. See progress o...
2023年6月29日 A Message from the Gravitational Universe Illustration Credit: NANOGrav Physics Frontier Center; Text: Natalia Lewandowska (SUNY Oswego) Explanation: Monitoring 68 pulsars with very large radio telescopes, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has uncovered evidence for the gravitational wave (GW) background b...
Aerostar’s high-altitude balloon is shown here moments after launch carrying payloads from 20 student teams as part of NASA’s TechRise Student Challenge. Credits: Fresh Produce Students from 20 middle and high schools watched as their experiments launched aboard a high-altitude balloon on June 14 as part of NASA’s TechRise Student Challenge. The flight is pa...
2023年6月28日 Messier 24: Sagittarius Star Cloud Image Credit & Copyright: Emmanuel Astronomono Explanation: Unlike most entries in Charles Messier’s famous catalog of deep sky objects, M24 is not a bright galaxy, star cluster, or nebula. It’s a gap in nearby, obscuring interstellar dust clouds that allows a view of the distant stars in the Sag...
一台名为欧几里得的新太空望远镜将于7月发射，这是ESA在美国宇航局的资助下完成的一项任务，旨在探索宇宙膨胀加速的原因，即暗能量。到2027年5月，NASA的南希·格雷斯·罗曼太空望远镜将与欧几里得一起，以前所未有的方式探索这个谜题。
A young alligator rests on a concrete structure at NASA’s Kennedy Space Center in Florida on April 25, 2023. Alligator breeding season starts in May when males begin courting females. By June, pairs have mated, and females build vegetation nests in the marsh. Eggs hatch in about 65 days. The mother carries her young to the water and protects them from predat...
2023年6月27日 MAVEN’s Ultraviolet Mars Image Credit: MAVEN, Laboratory for Atmospheric and Space Physics, Univ. Colorado, NASA Explanation: These two global views of Mars were captured at ultraviolet wavelengths, beyond the spectrum visible to human eyes. Recorded by the MAVEN spacecraft’s Imaging Ultraviolet Spectrograph instrument in July 2022 (le...
这种分子以前从未在太空中发现过，被认为是星际有机化学的基石。