保护地球，探索宇宙，发现文明
2021年7月30日 Mimas in Saturnlight Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Peering from the shadows, the Saturn-facing hemisphere of Mimas lies in near darkness alongside a dramatic sunlit crescent. The mosaic was captured near the Cassini spacecraft’s final close approach on January 30, 2017. Cassini’s camera was pointe...
On April 29, 2015, NuSTAR, Hinode, and Solar Dynamics Observatory all stared at our Sun. Flaring, active regions of our Sun are highlighted in this image combining observations from Nuclear Spectroscopic Telescope Array, or NuSTAR (shown in blue); low-energy X-rays from Japan’s Hinode spacecraft are green; and extreme ultraviolet light from Solar Dynam...
2021年7月29日 The Tulip and Cygnus X-1 Image Credit & Copyright: Carlos Uriarte Explanation: This tall telescopic field of view looks out along the plane of our Milky Way Galaxy toward the nebula rich constellation Cygnus the Swan. Popularly called the Tulip Nebula, the brightest glowing cloud of interstellar gas and dust above center is also found in the ...
From 156 million light-years away the heart of active galaxy IC 5063 reveals a mixture of bright rays and dark shadows coming from the blazing core, home of a supermassive black hole. In this Hubble Space Telescope image, astronomers suggest that a ring of dusty material surrounding the black hole may be casting its shadow into space. According to this scena...
2021年7月28日 Ring Galaxy AM 0644-741 Image Credit: NASA, ESA, Hubble, HLA; Processing: Jonathan Lodge Explanation: The rim of the large blue galaxy at the right is an immense ring-like structure 150,000 light years in diameter composed of newly formed, extremely bright, massive stars. AM 0644-741 is known as a ring galaxy and was caused by an immense galaxy co...
The Boeing CST-100 Starliner spacecraft is secured atop a United Launch Alliance Atlas V rocket at the Vertical Integration Facility at Space Launch Complex 41 at Cape Canaveral Space Force Station in Florida on July 17, 2021. Starliner is slated to launch on July 30 on Atlas V for Boeing’s second Orbital Flight Test (OFT-2) for NASA’s Commercial Crew Progra...
This image from May 11, 1971, is a high angle view showing the Apollo 15 spacecraft on the way from the Vehicle Assembly Building to Pad A, Launch Complex 39 at the Kennedy Space Center. The Saturn V stack and its mobile launch tower are atop a huge crawler-transporter. Apollo 15 was the fourth scheduled crewed lunar landing mission and was commanded by Davi...
2021年7月27日 Fleming’s Triangular Wisp Image Credit & Copyright: Anthony Saab Explanation: Chaotic in appearance, these tangled filaments of shocked, glowing gas are spread across planet Earth’s sky toward the constellation of Cygnus as part of the Veil Nebula. The Veil Nebula itself is a large supernova remnant, an expanding cloud born of the...
2021年7月26日 CG4: A Ruptured Cometary Globule Image Credit & Copyright: Nicolas Rolland & Martin Pugh Explanation: Can a gas cloud grab a galaxy? It’s not even close. The “claw” of this odd looking “creature” in the featured photo is a gas cloud known as a cometary globule. This globule, however, has ruptured. Cometary g...
天文学家首次在木星的卫星木卫三的大气中发现了水蒸气的证据。这种水蒸气是在木卫三表面的冰升华时形成的，也就是说，从固体变成气体。 科学家们利用NASA哈勃太空望远镜新的档案数据集，做出了这一发现，发表在《自然天文学》杂志上。 这张照片展示了1996年NASA哈勃太空望远镜观测到的木星卫星木卫三。木卫三位于5亿英里(超过6亿公里)之外，哈勃可以跟踪卫星上的变化，并在紫外和近红外波长揭示其他特征。天文学家现在利用哈勃望远镜提供的新的档案数据集，首次揭示了木星卫星木卫三大气中存在水蒸气的证据，这是由于水蒸气从卫星的冰面热逸出而来。 影像来源：NASA, ESA, John Spencer (SwRI Boulder) 此前的研究提供了间接证据，表明太阳系最大的卫星木卫三含有的水比地球上所有的海洋都要多。然而，那里的温度...