2023年4月22日 NGC 1333: Stellar Nursery in Perseus Image Credit: Science – NASA, ESA, STScI, Processing – Varun Bajaj (STScI), Joseph DePasquale (STScI), Jennifer Mack (STScI) Explanation: In visible light NGC 1333 is seen as a reflection nebula, dominated by bluish hues characteristic of s […]
2023年4月21日 Solar Eclipse from Western Australia Image Credit & Copyright: Gwenaël Blanck Explanation: Along a narrow path that mostly avoided landfall, the shadow of the New Moon raced across planet Earth’s southern hemisphere on April 20 to create a rare annular-total or hybrid solar ecl
2023年4月20日 The Dark Seahorse in Cepheus Image Credit & Copyright: Jeff Herman Explanation: Spanning light-years, 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, the du
2023年4月19日 Auroral Storm over Lapland Image Credit & Copyright: Juan Carlos Casado (Starry Earth, TWAN) Explanation: On some nights the sky is the best show in town. On this night, auroras ruled the sky, and the geomagnetic storm that created this colorful sky show originated from an increasing
2023年4月18日 Map of Total Solar Eclipse Path in 2024 April Image Credit: NASA, Science Visualization Studio Explanation: Would you like to see a total eclipse of the Sun? If so, do any friends or relatives live near the path of next April’s eclipse? If yes again, then you might want to arrange a
2023年4月17日 ELVES Lightning over Italy Image Credit & Copyright: Valter Binotto Explanation: What’s that red ring in the sky? Lightning. The most commonly seen type of lightning involves flashes of bright white light between clouds. Over the past 50 years, though, other types of upper-atmo
2023年4月16日 M2-9: Wings of a Butterfly Nebula Image Credit: Hubble Legacy Archive, NASA, ESA; Processing: Judy Schmidt Explanation: Are stars better appreciated for their art after they die? Actually, stars usually create their most artistic displays as they die. In the case of low-mass stars like ou
2023年4月15日 When Z is for Mars Image Credit & Copyright: Tunc Tezel (TWAN) Explanation: A composite of images captured about a week apart from mid August 2022 through late March 2023, this series traces the retrograde motion of ruddy-colored Mars. Progressing from lower right to upper left Mars
2023年4月14日 Portrait of NGC 3628 Image Credit: Image Credit & Copyright: Mike Selby & Mark Hanson Explanation: Sharp telescopic views of NGC 3628 show a puffy galactic disk divided by dark dust lanes. Of course, this portrait of the magnificent, edge-on spiral galaxy puts some astronomers i
2023年4月13日 NGC 2419: Intergalactic Wanderer Image Credit: ESA/Hubble, NASA, S. Larsen et al. Explanation: Stars of the globular cluster NGC 2419 are packed into this Hubble Space Telescope field of view toward the mostly stealthy constellation Lynx. The two brighter spiky stars near the edge of the
