2023年3月4日 10 Days of Venus and Jupiter Image Credit & Copyright: Soumyadeep Mukherjee Explanation: Venus and Jupiter may have caught your attention lately. The impending close conjunction of the two brightest planets visible in clear evening skies has been hard to miss. With Jupiter at the top, […]
2023年3月3日 RCW 86: Historical Supernova Remnant Image Credit: CTIO/NOIRLab/DOE/NSF/AURA, T.A. Rector (Univ.of Alaska/NSF’s NOIRLab), J. Miller (Gemini Obs./NSF’s NOIRLab), M. Zamani & D. de Martin (NSF’s NOIRLab) Explanation: In 185 AD, Chinese astronomers recorded the appearance of a new star i
2023年3月2日 Unraveling NGC 3169 Image Credit & Copyright: Mike Selby & Mark Hanson Explanation: Spiral galaxy NGC 3169 looks to be unraveling like a ball of cosmic yarn. It lies some 70 million light-years away, south of bright star Regulus toward the faint constellation Sextans. Wound up sp
2023年3月1日 The Flaming Star Nebula Image Credit & Copyright: Thomas Röell Explanation: Is star AE Aurigae on fire? No. Even though AE Aurigae is named the Flaming Star and the surrounding nebula IC 405 is named the Flaming Star Nebula, and even though the nebula appears to some like a swirling f
2023年2月28日 Crescent Moon Beyond Greek Temple Image Credit & Copyright: Elias Chasiotis Explanation: Why is a thin crescent moon never seen far from a horizon? Because the only geometry that gives a thin crescent lunar phase occurs when the Moon appears close to the Sun in the sky. The crescent
2023年2月27日 Zodiacal Ray with Venus and Jupiter Image Credit & Copyright: Ruslan Merzlyakov (astrorms) Explanation: What’s causing that unusual ray of light extending from the horizon? Dust orbiting the Sun. At certain times of the year, a band of sun-reflecting dust from the inner Solar S
2023年2月26日 Saturn’s Iapetus: Moon with a Strange Surface Image Credit: NASA, ESA, JPL, SSI, Cassini Imaging Team Explanation: What would make a moon look like a walnut? A strange ridge that circles Saturn’s moon Iapetus’s equator, visible near the bottom of the featured image, make
2023年2月25日 Crescent Moon Occultation Image Credit & Copyright: Fefo Bouvier Explanation: On February 22, a young Moon shared the western sky at sunset with bright planets Venus and Jupiter along the ecliptic plane. The beautiful celestial conjunction was visible around planet Earth. But from so
2023年2月24日 Jones-Emberson 1 Image Credit & Copyright: Serge Brunier, Jean-François Bax, David Vernet, C2PU/OCA Explanation: Planetary nebula Jones-Emberson 1 is the death shroud of a dying Sun-like star. It lies some 1,600 light-years from Earth toward the sharp-eyed constellation Lynx. About 4
2023年2月23日 Arp 78: Peculiar Galaxy in Aries Image Credit & Copyright: Josep Drudis Explanation: Peculiar spiral galaxy Arp 78 is found within the boundaries of the head strong constellation Aries. Some 100 million light-years beyond the stars and nebulae of our Milky Way galaxy, the island univ
