2021年11月09日 All of These Space Images are Fake Except One Image Credit: M. J. Smith et al. (U. Hertfordshire) Explanation: Why would you want to fake a universe? For one reason — to better understand our real universe. Many astronomical projects seeking to learn properties of our universe now […]
2021年11月07日 The Cat’s Eye Nebula in Optical and X-ray Image Credit: NASA, ESA, Hubble Legacy Archive; Chandra X-ray Obs.; Processing & Copyright: Rudy Pohl Explanation: To some it looks like a cat’s eye. To others, perhaps like a giant cosmic conch shell. It is actually one of bright
2021年11月05日 The Dark Seahorse in Cepheus Image Credit & Copyright: Valerio Avitabile Explanation: Light-years across, this suggestive shape known as the Seahorse Nebula appears in silhouette against a rich, luminous background of stars. Seen toward the royal northern constellation of Cepheus, t
2021年11月04日 NGC 147 and NGC 185 Image Credit & Copyright: Dan Bartlett Explanation: Dwarf galaxies NGC 147 (left) and NGC 185 stand side by side in this sharp telescopic portrait. The two are not-often-imaged satellites of M31, the great spiral Andromeda Galaxy, some 2.5 million light-years awa
2021年11月03日 The Horsehead and Flame Nebulas Image Credit & Copyright: Wissam Ayoub Explanation: The Horsehead Nebula is one of the most famous nebulae on the sky. It is visible as the dark indentation to the orange emission nebula at the far right of the featured picture. The horse-head feature
2021年11月02日 SN Requiem: A Supernova Seen Three Times So Far Image Credit: NASA, ESA, Hubble; Data: S. A. Rodney (U. South Carolina) et al.; Image Processing: J. DePasquale (STScI) Explanation: We’ve seen this same supernova three times — when will we see it a fourth? When a distant star
2021年11月01日 A Waterfall and the Milky Way Image Credit & Copyright: Xie Jie Explanation: The dream was to capture both the waterfall and the Milky Way together. Difficulties included finding a good camera location, artificially illuminating the waterfall and the surrounding valley effectively,
2021年10月31日 Dark Matter in a Simulated Universe Illustration Credit & Copyright: Tom Abel & Ralf Kaehler (KIPAC, SLAC), AMNH Explanation: Is our universe haunted? It might look that way on this dark matter map. The gravity of unseen dark matter is the leading explanation for why galaxies r
