保护地球，探索宇宙，发现文明
2022年6月27日 The Gum Nebula over Snowy Mountains Image Credit & Copyright: Wang Jin Explanation: The Gum Nebula is so large and close it is actually hard to see. This interstellar expanse of glowing hydrogen gas frequently evades notice because it spans 35 degrees — over 70 full Moons — while much of it is quite dim. This featured spectacular ...
2022年6月22日 Supernova Remnant: The Veil Nebula Image Credit & Copyright: Craig Stocks (Utah Desert Remote Observatories) Explanation: Ten thousand years ago, before the dawn of recorded human history, a new light would have suddenly have appeared in the night sky and faded after a few weeks. Today we know this light was from a supernova, or exploding sta...
2022年5月28日 RCW 86: Historical Supernova Remnant Image Credit & Copyright: Martin Pugh Explanation: In 185 AD, Chinese astronomers recorded the appearance of a new star in the Nanmen asterism. That part of the sky is identified with Alpha and Beta Centauri on modern star charts. The new star was visible for months and is thought to be the earliest record...
2022年3月5日 The Multiwavelength Crab Image Credit & Copyright: NASA, ESA, G. Dubner (IAFE, CONICET-University of Buenos Aires) et al.; A. Loll et al.; T. Temim et al.; F. Seward et al.; VLA/NRAO/AUI/NSF; Chandra/CXC; Spitzer/JPL-Caltech; XMM-Newton/ESA; Hubble/STScI Explanation: The Crab Nebula is cataloged as M1, the first object on Charles Messier’...
2022年2月2日 The Galactic Center in Radio from MeerKAT Image Credit: Ian Heywood (Oxford U.), SARAO; Color Processing: Juan Carlos Munoz-Mateos (ESO) Explanation: What’s happening at the center of our galaxy? It’s hard to tell with optical telescopes since visible light is blocked by intervening interstellar dust. In other bands of light, though, su...
2022年1月13日 Supernova Remnant Simeis 147 Image Credit & Copyright: Jason Dain Explanation: It’s easy to get lost following the intricate, looping, twisting filaments in this detailed image of supernova remnant Simeis 147. Also cataloged as Sharpless 2-240 it goes by the popular nickname, the Spaghetti Nebula. Seen toward the boundary of the constel...
2021年12月24日 M1: The Crab Nebula Image Credit & Copyright: Michael Sherick Explanation: The Crab Nebula is cataloged as M1, the first object on Charles Messier’s famous 18th century list of things which are not comets. In fact, the Crab is now known to be a supernova remnant, debris from the death explosion of a massive star, witnessed by astronome...
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05月19日 The Jellyfish and Mars Image Credit & Copyright: Jason Guenzel Explanation: Normally faint and elusive, the Jellyfish Nebula is caught in this alluring scene. In the telescopic field of view two bright yellowish stars, Mu and Eta Geminorum, stand just below and above the Jellyfish Nebula at the left. Cool red giants, they lie at the foot of ...
2021年01月23日 Recycling Cassiopeia A Image Credit: X-ray – NASA, CXC, SAO; Optical – NASA,STScI Explanation: Massive stars in our Milky Way Galaxy live spectacular lives. Collapsing from vast cosmic clouds, their nuclear furnaces ignite and create heavy elements in their cores. After a few million years, the enriched material is blasted back into i...