2023年5月31日 Simulation: A Disk Galaxy Forms Video Credit: TNG Collaboration, MPCDF, FAS Harvard U.; Music: World’s Sunrise (YouTube: Jimena Contreras) Explanation: How did we get here? We know that we live on a planet orbiting a star orbiting a galaxy, but how did all of this form? Since our un […]
2023年5月30日 M27: The Dumbbell Nebula Image Credit & Copyright: Patrick A. Cosgrove Explanation: Is this what will become of our Sun? Quite possibly. The first hint of our Sun‘s future was discovered inadvertently in 1764. At that time, Charles Messier was compiling a list of diffuse object
2023年5月29日 Milky Way over a Turquoise Wonderland Image Credit & Copyright: Petr Horálek / Institute of Physics in Opava, Sovena Jani Explanation: What glows there? The answer depends: sea or sky? In the sea, the unusual blue glow is bioluminescence. Specifically, the glimmer arises from Noctilu
2023年5月28日 Ida and Dactyl: Asteroid and Moon Image Credit: NASA, JPL, Galileo Mission Explanation: This asteroid has a moon. The robot spacecraft Galileo on route to Jupiter in 1993 encountered and photographed two asteroids during its long interplanetary voyage. The second minor planet it photograp
2023年5月27日 Crescent Neptune and Triton Image Credit: NASA, Voyager 2 Explanation: Gliding through the outer Solar System, in 1989 the Voyager 2 spacecraft looked toward the Sun to find this view of most distant planet Neptune and its moon Triton together in a crescent phase. The elegant image of ice
2023年5月26日 Virgo Cluster Galaxies Image Credit & Copyright: Abdullah Alharbi Explanation: Galaxies of the Virgo Cluster are scattered across this nearly 4 degree wide telescopic field of view. About 50 million light-years distant, the Virgo Cluster is the closest large galaxy cluster to our own
2023年5月25日 Cat’s Eye Wide and Deep Image Credit & Copyright: Jean-François Bax, Guillaume Gruntz Explanation: The Cat’s Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. Its more familiar outlines are seen in the brighter central region of the nebula in th
2023年5月24日 Observatory Aligned with Moon Occulting Jupiter Image Credit & Copyright: Rick Whitacre; Text: Natalia Lewandowska (SUNY Oswego) Explanation: Sometimes we witness the Moon moving directly in front of — called occulting — one of the planets in our Solar System. Earlier thi
2023年5月23日 Jupiter’s Swirls from Juno Image Credit: NASA/JPL-Caltech/SwRI/MSSS; Processing & License: Kevin M. Gill Explanation: Big storms are different on Jupiter. On Earth, huge hurricanes and colossal cyclones are centered on regions of low pressure, but on Jupiter, it is the high-pre
2023年5月22日 Supernova Discovered in Nearby Spiral Galaxy M101 Image Credit & Copyright: Craig Stocks Explanation: A nearby star has exploded and humanity’s telescopes are turning to monitor it. The supernova, dubbed SN 2023ixf, was discovered by Japanese astronomer Koichi Itagaki three day
