5 Most Popular Space Videos of 2011
This artist’s impression shows the planet HD 85512b orbiting the Sun-like star HD 85512 about 35 light-years from Earth. This planet is about 3.6 times as massive as the Earth is at the edge of the habitable zone around the star, where liquid water, and perhaps even life, could potentially exist.
Credit: ESO/M. Kornmesser

The year 2011 saw some amazing astronomical discoveries and unforgettable spaceflight events, so it comes as no surprise that many of those cosmic happenings were caught on camera. 

For SPACE.com readers, some of those events were more gripping than others, especially when it came to space videos. Take a look at the five most popular space videos of 2011 and if you don't see you're favorite, don't worry. You can relive the space events in our SPACE.com video archive, or look forward to a promising out-of-this-world year in 2012.

No. 5 ) Private Spaceship Lands at Spaceport America

In October, the private spaceflight company Virgin Galactic dedicated a hangar at Spaceport America in New Mexico, a rocket launch site slated to be the space tourism company's homeport for passenger spaceflights. The hangar dedication followed a 2010 runway dedication that saw Virgin Galactic's flagship spacecraft, the SpaceShipTwo Enterprise, make a landing at Spaceport America  seen here, a video that drew major interest among SPACE.com readers. 

No. 4) NASA Telescope Discovers 16 "Super-Earths"

On Sept. 12, scientists announced the confirmation of 50 newfound alien planets, including 16 super-Earths  that were slightly larger than our home planet. The planets were discovered using a telescope in Chile operated by the European Southern Observatory. To mark the discovery, ESO officials released this video to review the 16 super-Earths found.

No. 3) How DARPA's Hypersonic Bomber Prototype Works

In August, the U.S. military launched a test flight of a hypersonic bomber prototype, known as the Hypersonic Test Vehicle 2, on a flight that reached the ultra-fast speed of Mach 20   before plunging into the Pacific Ocean. The unmanned hypersonic drone flight was overseen by the Defense Advanced Research Projects Agency, which detailed how the mission would work in this video.

No. 2) 9/11 From Space:  A Tragic Day Remembered

Sept. 11, 2011 was a somber day for Americans, with memorial services across the country for those killed in the terrorist attacks of Sept. 11, 2001. Ten years earlier, on the day of the attacks, NASA astronaut Frank Culbertson was living aboard the International Space Station - the only American off the planet at the time - and was shocked to see the destruction of the World Trade Center in New York City from orbit. He took this video and sent comments to NASA's Mission Control center in Houston at the time. 

No. 1) Skywatcher Spots Doomed NASA Satellite

The undisputed winner is this video of NASA's defunctUpper Atmosphere Research Satellite taken just days before the huge spacecraft fell to Earth in late-September. Veteran astrophotographer ThierryLegault used a 14-inch telescope equipped with a camera to record the video from Northern France. 

Follow SPACE.com for the latest in space science and exploration news on Twitter @Spacedotcom and on Facebook.