2023年8月20日 A Roll Cloud Over Wisconsin Credit: Megan Hanrahan (Pierre cb), Wikipedia Explanation: What kind of cloud is this? A type of arcus cloud called a roll cloud. These rare long clouds may form near advancing cold fronts. In particular, a downdraft from an advancing storm front can cause mois […]
2023年8月19日 Ringed Ice Giant Neptune Image Credit: NASA, ESA, CSA, STScI, NIRCam Explanation: Ringed ice giant Neptune lies near the center of this sharp near-infrared image from the James Webb Space Telescope. The dim and distant world is the farthest planet from the Sun, about 30 times farther away
2023年8月18日 Northern Pluto Image Credit: NASA, Johns Hopkins Univ./APL, Southwest Research Institute Explanation: Gaze across the frozen canyons of northern Pluto in this contrast enhanced color scene. The image data used to construct it was acquired in July 2015 by the New Horizons spacecraft as it
2023年8月17日 A Cosmic Zoo in Cepheus Image Credit & Copyright: Yann Sainty Explanation: Sprawling emission nebulae IC 1396 and Sh2-129 mix glowing interstellar gas and dark dust clouds in this nearly 12 degree wide field of view toward the northern constellation Cepheus the King. Energized by its
2023年8月16日 Arp 93: A Cosmic Embrace Image Credit & Copyright: Mike Selby, Observatorio El Sauce Explanation: Locked in a cosmic embrace, two large galaxies are merging at the center of this sharp telescopic field of view. The interacting system cataloged as Arp 93 is some 200 million light-year
2023年8月15日 A Triply Glowing Night Sky over Iceland Credit & Copyright: Wioleta Gorecka; Text: Natalia Lewandowska (SUNY Oswego) Explanation: The Sun is not the quiet place it seems. It expels an unsteady stream of energetic electrons and protons known as the solar wind. These charged particles
2023年8月14日 The Ring Nebula from Webb Credit: NASA, ESA, CSA, JWST; Processing: Zi Yang Kong Explanation: The Ring Nebula (M57), is more complicated than it appears through a small telescope. The easily visible central ring is about one light-year across, but this remarkable exposure by the James Web
2023年8月13日 The Sombrero Galaxy in Infrared Credit: R. Kennicutt (Steward Obs.) et al., SSC, JPL, Caltech, NASA Explanation: This floating ring is the size of a galaxy. In fact, it is a galaxy — or at least part of one: the photogenic Sombrero Galaxy, one of the largest galaxies in the nearby V
2023年8月12日 Ghirigori – Star Scribbles Image Credit & Copyright: Paolo Palma Explanation: It’s fun to scribble on the canvas of the sky. You can use a creative photographic technique to cause the light of point-like stars to dance across a digital image by tapping lightly on the tele
2023年8月11日 Messier 51 in 255 Hours Image Credit & Copyright: The Deep Sky Collective – Carl Björk, Thomas Bähnck, Sebastian Donoso, Jake Gentillon, Antoine and Dalia Grelin, Stephen Guberski, Richard Hall, Tino Heuberger, Jason Jacks, Paul Kent, Brian Meyers, William Ostling, Nicolas Puig
