2023年2月3日 Polaris and the Trail of Comet ZTF Image Credit & Copyright: David Ibarra Gomez Explanation: Stars trace concentric arcs around the North Celestial Pole in this three hour long night sky composite, recorded with a digital camera fixed to a tripod on January 31, near Àger, Lleida, Spai […]
2023年2月2日 Reflections on the 1970s Image Credit & Copyright: Daniel Stern Explanation: The 1970s are sometimes ignored by astronomers, like this beautiful grouping of reflection nebulae in Orion – NGC 1977, NGC 1975, and NGC 1973 – usually overlooked in favor of the substantial glow
2023年2月1日 The Seventh World of Trappist-1 Illustration Credit & Copyright: Michael Carroll Explanation: Seven worlds orbit the ultracool dwarf star TRAPPIST-1. A mere 40 light-years away, many of the exoplanets were discovered in 2016 using the Transiting Planets and Planetesimals Small Telesco
2023年1月31日 A Triple View of Comet ZTF Image Credit & Copyright: Javier Caldera & Miguel Gracia Explanation: Comet ZTF has a distinctive shape. The now bright comet visiting the inner Solar System has been showing not only a common dust tail, ion tail, and green gas coma, but also an uncomm
2023年1月30日 Globular Star Cluster NGC 6355 from Hubble Image Credit: ESA/Hubble & NASA, E. Noyola, R. Cohen Explanation: Globular clusters once ruled the Milky Way. Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy. Today, there are
2023年1月29日 Barnard 68: Dark Molecular Cloud Image Credit: FORS Team, 8.2-meter VLT Antu, ESO Explanation: Where did all the stars go? What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud. Here, a high concentration of dust and molecular gas absorb practi
2023年1月28日 Comet ZTF over Mount Etna Image Credit & Copyright: Dario Giannobile Explanation: Comet-like plumes are blowing over the volcanic peaks of Mount Etna in this wintry mountain-and-skyscape from planet Earth. The stacked and blended combination of individual exposures recorded during th
2023年1月27日 Comet ZTF: Orbital Plane Crossing Image Credit & Copyright: Dan Bartlett Explanation: The current darling of the northern night, Comet C/2022 E3 ZTF is captured in this telescopic image from a dark sky location at June Lake, California. Of course Comet ZTF has been growing brighter i
2023年1月26日 Active Galaxy NGC 1275 Image Credit: NASA, ESA, Hubble Heritage, A. Fabian (University of Cambridge, UK) Explanation: Active galaxy NGC 1275 is the central, dominant member of the large and relatively nearby Perseus Cluster of Galaxies. Wild-looking at visible wavelengths, the active gala
2023年1月25日 LDN 1622: The Boogeyman Nebula Image Credit & Copyright: Joshua Carter Explanation: To some, the dark shape looks like a mythical boogeyman. Scientifically, Lynds’ Dark Nebula (LDN) 1622 appears against a faint background of glowing hydrogen gas only visible in long telescopic
