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http://apod.nasa.gov/apod/ap120912.html M7: Open Star Cluster in Scorpius Image Credit & Copyright: Dieter Willasch (Astro-Cabinet) Explanation: M7 is one of the most prominent open clusters of stars on the sky. The cluster, dominated by bright blue stars, can be seen with the naked eye in a dark sky in the tail of the constellation of the Scorpion (Scorpius). M7 contains abou..

http://apod.nasa.gov/apod/ap120903.html M45: The Pleiades Star Cluster Image Credit & Copyright: Robert Gendler Explanation: Perhaps the most famous star cluster on the sky, the Pleiades can be seen without binoculars from even the depths of a light-polluted city. Also known as the Seven Sisters and M45, the Pleiades is one of the brightest and closest open clusters. The Pleia..

http://apod.nasa.gov/apod/ap120828.html Colorful Clouds Near Rho Ophiuchi Image Credit & Copyright: Tom O'Donoghue Explanation: Why is the sky near Antares and Rho Ophiuchi so colorful? The colors result from a mixture of objects and processes. Fine dust illuminated from the front by starlight produces blue reflection nebulae. Gaseous clouds whose atoms are excited by ultravio..

http://apod.nasa.gov/apod/ap120614.html M13: The Great Globular Cluster in Hercules Image Credit & Copyright: Martin Pugh 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 modestly recognized as the Great Globular Cluster in Hercules..

http://apod.nasa.gov/apod/ap120824.html Moon Meets Morning Star Image Credit & Copyright: Kwon, O Chul (TWAN) Explanation: Rising in the dark hours before dawn, wandering Venus now shines as the brilliant morning star. Its close conjunction with the Moon on August 13 was appreciated around planet Earth. But skygazers in eastern Asia were also treated to a lunar occultation, th..

http://apod.nasa.gov/apod/ap120823.html Conjunction Colours Image Credit & Copyright: Phil Hart Explanation: During the past week, nightfall on planet Earth has featured Mars, Saturn, and Spica in a lovely conjunction near the western horizon. Still forming the corners of a distinctive celestial triangle after sunset and recently joined by a crescent Moon, they are all about t..

http://apod.nasa.gov/apod/ap120822.html Clouds Near the Edge of Space Image Credit & Copyright: P-M Hedén (Clear Skies, TWAN) Explanation: Noctilucent or night-shining clouds lie near the edge of space. From about 80 kilometers above Earth's surface, the icy clouds can still reflect sunlight even though the Sun itself is below the horizon as seen from the ground. Usually ..

http://apod.nasa.gov/apod/ap120820.html A Filament Across the Sun Image Credit & Copyright: Bret Dahl Explanation: Is that a cloud hovering over the Sun? Yes, but it is quite different than a cloud hovering over the Earth. The long light feature on the left of the above color-inverted image is actually a solar filament and is composed of mostly charged hydrogen gas held aloft ..

http://apod.nasa.gov/apod/ap120729.html Star Cluster R136 Bursts Out Image Credit: NASA, ESA, & F. Paresce (INAF-IASF), R. O'Connell (U. Virginia), & the HST WFC3 Science Oversight Committee Explanation: In the center of star-forming region 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. These stars, known collectively as star cluster R136, we..

동영상 http://apod.nasa.gov/apod/ap120611.html A Venus Transit Music Video from SDO Credit: Solar Dynamics Observatory, SVS, GSFC, NASA; Music: Dramatic Intro (stockmusic.net) Explanation: What's that black dot moving across the Sun? Venus. Possibly the clearest view of Venus crossing in front of the Sun last week was from Earth orbit. The Solar Dynamics Observatory obtaine..