保护地球，探索宇宙，发现文明
A new NASA citizen science project, Jovian Vortex Hunter, seeks your help spotting vortices – spiral wind patterns – and other phenomena in photos of the planet Jupiter. Another NASA citizen science project, called Junocam, seeks help from members of the public processing images from NASA’s Juno Mission and choosing targets for the spacecraft. However, the n...
2022年7月6日 Milky Way Motion in 3D from Gaia Credit & License: ESA, Gaia, DPAC; Text: Ata Sarajedini (Florida Atlantic U., Astronomy Minute podcast) Explanation: Our sky is alive with the streams of stars. The motions of 26 million Milky Way stars are evident in the featured map constructed from recent data taken by ESA’s Gaia satellite. Stars color...
H1821+643是一个由超大质量黑洞驱动的类星体，距离地球约34亿光年。天文学家使用美国宇航局的钱德拉X射线天文台确定了H1821+643黑洞的自转，使其成为对这一基本性质进行精确测量的质量最大的黑洞，如我们在新闻稿中所述。天文学家估计，位于H1821+643的活跃黑洞包含约30亿至300亿太阳质量，是已知质量最大的黑洞之一。相比之下，银河系中心的超大质量黑洞重约400万个太阳。 这张H1821+643的合成图像包含来自钱德拉的X射线（蓝色），它与来自美国国家科学基金会卡尔·G·扬斯基甚大阵列（红色）的无线电数据和来自夏威夷泛星计划的光学图像（白色和黄色）相结合。研究人员使用了20多年前钱德拉近一周的观测时间来获得这一最新结果。超大质量黑洞位于射电和X射线发射中心的亮点中。 由于自转黑洞拖动周围的空间，使物质...
The last rays of an orbital sunset burst through Earth’s horizon as the International Space Station flew 258 miles above Brazil in this image from June 2022. In 24 hours, the space station makes 16 orbits of Earth, traveling through 16 sunrises and sunsets. Want more station facts? Visit International Space Station Facts and Figures. Image Credit: NASA...
2022年7月5日 A Molten Galaxy Einstein Ring Image Credit: ESA/Hubble & NASA, S. Jha; Processing: Jonathan Lodge Explanation: It is difficult to hide a galaxy behind a cluster of galaxies. The closer cluster’s gravity will act like a huge lens, pulling images of the distant galaxy around the sides and greatly distorting them. This is just the case obse...
2022年7月4日 Strawberry Supermoon Over Devil’s Saddle Image Credit & Copyright: Lorenzo Busilacchi Explanation: Near the horizon the full moon often seems to loom large, swollen in appearance by the famous Moon illusion. But time-lapse image sequences demonstrate that the Moon’s angular size doesn’t really change as it rises or sets. Its ...
In this image from 2014, an adult osprey, carrying a fish in its talons, prepares to land in its nest atop a speaker platform in the press site parking lot at NASA’s Kennedy Space Center in Florida. In the background is the 209-foot-tall U.S. flag painted on the side of the 52-story Vehicle Assembly Building, which serves as the central hub of NASA’s p...
NASA’s Oceans Melting Greenland, or OMG, airborne mission found that most of Greenland’s glaciers that empty into the ocean are at greater risk of rapid ice loss than previously understood. OMG’s six-year field campaign studied the ocean’s role in glacial ice loss by gathering precise measurements of ocean depth, temperature, and sali...
2022年7月3日 Phobos: Doomed Moon of Mars Image Credit: HiRISE, MRO, LPL (U. Arizona), NASA Explanation: This moon is doomed. Mars, the red planet named for the Roman god of war, has two tiny moons, Phobos and Deimos, whose names are derived from the Greek for Fear and Panic. These martian moons may well be captured asteroids originating in the main asteroid bel...
2022年7月2日 Solargraphic Analemmas Image Credit & Copyright: Dawid Rycabel (Pinholove) Explanation: For the northern hemisphere June 21 was the summer solstice, the Sun reaching its northernmost declination for the year. That would put it at the top of each of these three figure-8 curves, or analemmas, as it passed through the daytime sky over the village...