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How to Watch 'Dark Knight' Planet Cross Host Star's Face

If you've ever wanted to catch a glimpse of a distant alien world, here's your chance.

TrES-2b, a planet nicknamed "Dark Knight" because it reflects so little light, will cross the face of its host star Saturday (June 27) in a "transit" captured by the online Slooh Community Observatory. You can watch the free event — the first-ever live public observation of an exoplanet, according to Slooh representatives — live at 8 p.m. EDT Saturday (0000 GMT Sunday) at the Slooh website: www.slooh.com.

You can also watch the exoplanet webcast on Space.com, courtesy of Slooh. The show, a collaboration involving Slooh and the Institute of Astrophysics of the Canary Islands, will feature live views from the Carlos Sánchez Telescope, one of the world's largest infrared scopes. It will also include commentary from Slooh hosts Bob Berman and Eric Edelman as well as exoplanet researcher Lisa Kaltenegger of Cornell University in Ithaca, New York and astronomer Seth Shostak of the SETI (Search for Extraterrestrial Intelligence) Institute in Mountain View, California. [The Strangest Alien Planets (Gallery)]

Image: Artist's concept of alien world TrES-2b and some hypothetical moons of the planet

Artist's concept of the Jupiter-size alien world TrES-2b and some hypothetical moons of the planet, which is nicknamed "Dark Knight" because it reflects less than 1 percent of the light that hits it.