2023年4月11日 North Star: Polaris and Surrounding Dust Image Credit & Copyright: Javier Zayaz Explanation: Why is Polaris called the North Star? First, Polaris is the nearest bright star toward the north spin axis of the Earth. Therefore, as the Earth turns, stars appear to revolve around Polaris, […]
2023年4月10日 IC 2944: The Running Chicken Nebula Image Credit & Copyright: Daniel Stern Explanation: To some, it looks like a giant chicken running across the sky. To others, it looks like a gaseous nebula where star formation takes place. Cataloged as IC 2944, the Running Chicken Nebula spans ab
2023年4月9日 The Egg Nebula in Polarized Light Image Credit: Hubble Heritage Team (STScI / AURA), W. Sparks (STScI) & R. Sahai (JPL), NASA Explanation: Where is the center of the Egg Nebula? Emerging from a cosmic egg, the star in the center of the Egg Nebula is casting away shells of gas and dust
2023年4月8日 M100: A Grand Design Spiral Galaxy Image Credit: NASA, ESA, Hubble; Processing: Judy Schmidt Explanation: Majestic on a truly cosmic scale, M100 is appropriately known as a grand design spiral galaxy. It is a large galaxy of over 100 billion stars with well-defined spiral arms that is simi
2023年4月6日 Terran 1 Burns Methalox Image Credit: Relativity / John Kraus Explanation: Relativity’s Terran 1 Rocket is mostly 3D-printed. It burns a cryogenic rocket fuel composed of liquid methane and liquid oxygen (methalox). In this close-up of a Terran 1 launch on the night of March 22 from
2023年4月5日 Rubin’s Galaxy Image Credit: NASA, ESA, B. Holwerda (University of Louisville) Explanation: In this Hubble Space Telescope image the bright, spiky stars lie in the foreground toward the heroic northern constellation Perseus and well within our own Milky Way galaxy. In sharp focus bey
2023年4月4日 Olympus Mons: Largest Volcano in the Solar System Image Credit: ESA, DLR, FU Berlin, Mars Express; Processing & CC BY 2.0 License: Andrea Luck Explanation: The largest volcano in our Solar System is on Mars. Although three times higher than Earth’s Mount Everest, Olympus Mons wi
2023年4月3日 The Galactic Center Radio Arc Image Credit: Ian Heywood (Oxford U.), SARAO; Explanation: What causes this unusual curving structure near the center of our Galaxy? The long parallel rays slanting across the top of the featured radio image are known collectively as the Galactic Center Radio
2023年4月2日 M57: The Ring Nebula from Hubble Image Credit: NASA, ESA, Hubble Legacy Archive; Processing: Judy Schmidt Explanation: It was noticed hundreds of years ago by stargazers who could not understand its unusual shape. It looked like a ring on the sky. Except for the rings of Saturn, the Ring N
