Here's How a Huge Exoplanet Very Close to Earth Could Hide Strange Forms of Life
By Rafi Letzter, Staff Writer | January 18, 2019 08:08am ET
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There's a chance that the dimly lit super-Earth called Barnard b, which orbits Barnard's star, could support life. Here, an artist's impression of the planet's frozen surface.
Credit: ESO/M. Kornmesser
There's a rocky planet out there that's very big and cold. Its sun, a red dwarf named "Barnard's star" looks much larger in its sky than Earth's. It bathes the planet in X-rays and ultraviolet light, likely enough radiation to strip away any atmosphere. But Barnard's star is also much dimmer than Earth's host star, so the planet's surface is probably a frozen wasteland the sort of place that likely wouldn't have any liquid water, and that most scientists wouldn't expect to support life.
But a new analysis suggests that the planet, named Barnard B, might give rise to life after all.
In a presentation on Jan. 10 at the 233rd meeting of the American Astronomical Society in Seattle, Washington, a pair of Villanova astronomers argued that if Barnard B had enough geothermal activity, it might have pockets of heat on its surface where life might survive.
Barnard B is still too small and far away for our current generation of telescopes to image directly. Instead, scientists know it's there and they know its general characteristics a rocky planet more than three times the mass of Earth about as close to its star as Mercury is to ours from studying the way it makes light coming from Barnard's star wiggle. [Gallery: Unique Life at Antarctic Deep-Sea Vents]
More:
https://www.livescience.com/64537-exoplanet-barnard-ice-life.html