哈雷彗星的尘埃、火星尘与银河
2023年5月12日 Halley Dust, Mars Dust, and Milky Way Image Credit & Copyright: Petr Horalek / Institute of Physics in Opava Explanation: Grains of cosmic dust streaked through night skies in early May. Swept up as planet Earth plowed through the debris streams left behind by periodic Comet Halley, the annual meteor shower is known as the Eta Aquarids. This year, the Eta Aquarids peak was visually hampered by May’s bright Full Moon, though. But early morning hours surrounding last May’s shower of Halley dust were free of moonlight interference. In exposures recorded between April 28 and May 8 in 2022, this composited image shows nearly 90 Eta Aquarid meteors streaking from the shower’s radiant in Aquarius over San Pedro de Atacama, Chile. The central Milky…