保护地球，探索宇宙，发现文明
2022年5月6日 NGC 3572 and the Southern Tadpoles Image Credit & Copyright: Carlos Taylor Explanation: This cosmic skyscape features glowing gas and dark dust clouds along side the young stars of NGC 3572. A beautiful emission nebula and star cluster it sails far southern skies within the nautical constellation Carina. Stars from NGC 3572 are toward top cent...
The SpaceX Dragon Endurance spacecraft is seen just after undocking from the forward port of the International Space Station’s Harmony module at 1:20 a.m. EDT, Thursday, May 5, 2022. Endurance is bringing Crew-3 back to Earth, including NASA astronauts Kayla Barron, Raja Chari, and Tom Marshburn, and ESA (European Space Agency) astronaut Matthias Maurer, aft...
在NASA 2001年奥德赛轨道飞行器上的热发射成像系统（THEMIS）相机拍摄的这些图像中，主要由二氧化碳组成的火星表面霜冻呈现蓝白色。THEMIS拍摄肉眼可感知的可见光和热敏红外线图像。 影像来源：NASA/JPL-Caltech/ASU 一项使用NASA火星奥德赛轨道器数据的新研究可能解释了为什么肉眼看不到火星上的霜冻，以及为什么某些斜坡上会出现尘埃崩塌。 去年，科学家们在研究NASA的火星奥德赛轨道器在黎明时分拍摄的火星表面图像时感到困惑。当他们用肉眼所能感知的可见光观察火星表面时，他们能看到由初升的太阳照亮的幽灵般的蓝白色晨霜。但使用轨道飞行器的热敏相机，霜冻出现的范围更广，包括在看不到霜冻的区域。 科学家们知道，他们看到的是夜间形成的霜，主要由二氧化碳构成——本质上是干冰，在红色星球上，干冰通常以霜...
2022年5月5日 NGC 3521: Galaxy in a Bubble Image Credit & Copyright: Mark Hanson and Mike Selby Explanation: Gorgeous spiral galaxy NGC 3521 is a mere 35 million light-years away, toward the northern springtime constellation Leo. Relatively bright in planet Earth’s sky, NGC 3521 is easily visible in small telescopes but often overlooked by amateur ima...
Black holes are hard to find. They have such strong gravity that light can’t escape them, so scientists must rely on clues from their surroundings to find them. When a star weighing more than 20 times the Sun runs out of fuel, it collapses into a black hole. Scientists estimate that there are tens of millions of these black holes dotted around the Milky Way,...
2022年5月4日 Planets Over Egyptian Pyramid Image Credit & Copyright: Osama Fatehi Explanation: The early morning planet parade continues. Visible the world over, the planets Jupiter, Venus, Mars and Saturn have been lining up in the pre-dawn sky since mid-April. In the featured image taken last month, these planets were captured over the Step Pyramid of Dj...
May 2-6, 2022, is Teacher Appreciation Week! At NASA, we know the importance of STEM (science, technology, engineering, and math) education, and we provide lesson plans and other tools to help out classrooms. Visit NASA STEM Engagement for lesson plans and more. In the Discovering Alien Oceans: Density lesson, teachers will help their students to learn more ...
Misty Snopkowski is NASA’s program executive for the Commercial Low-Earth Orbit (LEO) Development program, which works to create a robust commercial LEO economy by enabling the development of commercially owned and operated LEO destinations. Her responsibilities include the oversight of activities within the Commercial LEO Development Program portfolio. This...
2022年5月3日 Mercury’s Sodium Tail Image Credit & Copyright: Sebastian Voltmer Explanation: That’s no comet. Below the Pleiades star cluster is actually a planet: Mercury. Long exposures of our Solar System’s innermost planet may reveal something unexpected: a tail. Mercury’s thin atmosphere contains small amounts of sodium that glo...
2022年5月2日 Partial Solar Eclipse over Argentina Image Credit & Copyright: Aixa Andrada Explanation: What’s happened to the Sun? Two days ago, parts of South America were treated to a partial solar eclipse — where the Moon blocked out part of the Sun. The featured image shows an image of the partially eclipsed Sun through clouds as it was sett...