Subscribe to Breaking News emails

You have successfully subscribed to the Breaking News email.

Subscribe today to be the first to to know about breaking news and special reports.

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

by Mike Wall, Space.com /
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.David A. Aguilar (CfA)

Breaking News Emails

Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.

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.David A. Aguilar (CfA)

"Saturday evening, Dark Knight will begin to cross in front of its star 28 minutes into the live broadcast, and will end its journey exactly 1 hour and 30 minutes later," Slooh representatives said in a statement. "Slooh will cover the whole event live, from start to finish, giving viewers a front row seat to the excitement, science, and mystery involved in observing an alien planet."

TrES-2b, which lies about 750 light-years from Earth, won't be directly visible during the webcast. But viewers should be able to observe a slight dimming when the roughly Jupiter-size world crosses in front of its parent star (or stars, rather, since scientists think TrES-2b resides in a binary system) from Earth's perspective.

NASA's Kepler spacecraft, which has discovered more than half of the nearly 2,000 known exoplanets to date, employs this "transit method" to hunt for alien worlds, as do a number of other instruments. Indeed, TrES-2b was discovered via the transit method in 2006, by researchers studying observations from the Palomar Observatory in California and the Lowell Observatory in Arizona.

This is an abbreviated version of a report from Space.com. Read the full report. Follow Mike Wall on Twitter @michaeldwall and Google+. Follow us @Spacedotcom, Facebook or Google+.

More from Space.com

Breaking News Emails

Get breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.
MORE FROM news