Best Space Photos of the Week Dec. 10, 2011

From a dragonfish in the sky to a rainbow image of asteroid Vesta, there were some stunning views from space this week. <br><br> Don't miss these stunning photos and images from the last week in space.
Streams of stars spread out across the sky are evidence that the Milky Way has been chomping on neighboring dwarf galaxies, a new study reports. [<a href="http://www.space.com/13815-milky-sagittarius-dwarf-galaxy-star-streams.html">Read More</a>]
Three astronomers at the University of Toronto have found the most numerous batch of young, supermassive stars yet observed in our galaxy: hundreds of thousands of stars, including several hundreds of the most massive kind - blue stars dozens of times heavier than our sun. [<a href="http://www.space.com/13861-supermassive-stars-dragonfish-mouth-cluster.html">Read More</a>]
NASA's Dawn spacecraft is revealing the asteroid Vesta in a whole new light. [<a href="http://www.space.com/13836-asteroid-vesta-rainbow-image-rock-composition.html">Read More</a>]
-- NASA's Kepler spacecraft has detected more than 1,000 new alien planet candidates, and confirmed its first exoplanet in its host star's habitable zone. The finds bring the number of potential exoplanets discovered by the space telescope to more than 2,000. [<a href="http://www.space.com/13821-nasa-kepler-alien-planets-habitable-zone.html">Read More</a>]
New research reveals that Martian polar gullies could have formed without the presence of liquid water on their surface. Instead, the sublimation of carbon dioxide could have been responsible for the formations on the red planet. [<a href="http://www.space.com/13855-martian-polar-gullies-mystery-carbon-dioxide.html">Read More</a>]
Scientists have discovered the largest black holes known to date, supermassive black holes that weigh more than 9 billion times the mass of our sun. [<a href="http://www.space.com/13819-black-holes-largest-massive.html">Read More</a>]
Antarctica may be the bottom of the world, but the coldest, driest, highest continent is the best place for looking up at the heavens on Earth. [<a href="http://www.space.com/13873-alien-planet-crooked-bend-star-debris-disk.html">Read More</a>]
The Barringer meteorite crater – known popularly as “Meteor Crater” near Winslow, Ariz., is a prime example of a space rock impact site, and is being used by scientists to study the mechanics of impacts throughout the universe. [<a href="http://www.space.com/13868-barringer-meteor-crater-arizona-science-planets.html">Read More</a>]
Stephan's Quintet, in the constellation Pegasus, consists of five galaxies, although one lies closer than the others. Japan's Subaru Telescope shows two views of the grouping using different filters to distinguish the recession velocity of each object, the speed at which the object moves away from the observer. The image on the left shows the galaxies filtered for a recession velocity of 0, while the one on the right shows them filtered for a recession velocity of 4,200 miles per second. The contrasting images show that NGC7320 (lower left) is closer than the other galaxies. [<a href="http://www.space.com/34-image-day.html">See more amazing space images</a>]
