우리집마당

Fresh Tiger Stripes on Saturn's Enceladus Image Credit : NASA, ESA, JPL, SSI, Cassini Imaging Team Explanation : How will humanity first learn of extraterrestrial life? One possibility is to find it under the icy surface of Saturn's moon Enceladus. A reason to think that life may exist there are long features — dubbed tiger stripes -- that are known to be spewing ice from the moon's icy interior..

우주 2020. 5. 30. 23:02

Cassini's Last Ring Portrait at Saturn Image Credit: NASA, JPL-Caltech, Space Science Institute, Mindaugas Macijauskas Explanation : How should Cassini say farewell to Saturn? Three days before plunging into Saturn's sunny side, the robotic Cassini spacecraft swooped far behind Saturn's night side with cameras blazing. Thirty-six of these images have been merged — by an alert and adept citizen s..

우주 2020. 5. 29. 23:28

The Northern Winter Hexagon Image Credit & Copyright : Petr Horálek Explanation : December's New Moon brought a solar eclipse to some for the holiday season. It also gave beautiful dark night skies to skygazers around the globe, like this moonless northern winter night. In the scene, bright stars of the Winter Hexagon along the Milky Way are rising. Cosy mountain cabins in the snowy foreground a..

우주 2020. 5. 29. 14:49

The W in Cassiopeia Image Credit & Copyright : Rogelio Bernal Andreo (Deep Sky Colors) Explanation : A familiar, zigzag, W pattern in northern constellation Cassiopeia is traced by five bright stars in this colorful and broad mosaic. Stretching about 15 degrees across rich starfields, the celestial scene includes dark clouds, bright nebulae, and star clusters along the Milky Way. In yellow-orang..

우주 2020. 5. 29. 14:21

M46 Plus Two Image Credit & Copyright : Denis Priou Explanation : Galactic or open star clusters are young. These swarms of stars are born together near the plane of the Milky Way, but their numbers steadily dwindle as cluster members are ejected by galactic tides and gravitational interactions. In fact, this bright open cluster, known as M46, is around 300 million years young. It still contains..

우주 2020. 5. 26. 19:44

NGC 7789 : Caroline's Rose Image Credit & Copyright : Guillaume Seigneuret Explanation : Found among the rich starfields of the Milky Way, star cluster NGC 7789 lies about 8,000 light-years away toward the constellation Cassiopeia. A late 18th century deep sky discovery of astronomer Caroline Lucretia Herschel, the cluster is also known as Caroline's Rose. Its flowery visual appearance in small ..

우주 2020. 5. 25. 17:47

Messier 5 Image Credit & Copyright : Adam Block, Mt. Lemmon SkyCenter, University of Arizona Explanation : "Beautiful Nebula discovered between the Balance [Libra] & the Serpent [Serpens] ..." begins the description of the 5th entry in 18th century astronomer Charles Messier's famous catalog of nebulae and star clusters. Though it appeared to Messier to be fuzzy and round and without stars, Mess..

우주 2020. 5. 25. 17:02

M13 : The Great Globular Cluster in Hercules Image Credit & Copyright : Adam Block, Mt. Lemmon SkyCenter, U. Arizona Explanation : In 1716, English astronomer Edmond Halley noted, "This is but a little Patch, but it shews itself to the naked Eye, when the Sky is serene and the Moon absent." Of course, M13 is now less modestly recognized as the Great Globular Cluster in Hercules, one of the brigh..

우주 2020. 5. 23. 13:29