steve cross loves music and science

Credit: NASA

The Kepler team at NASA announced yet another exciting discovery yesterday: the first confirmed earth-size alien planets, Kepler 20f and 20e. The mission has found other exoplanets that pretty close to earth-size, but these two are by far the closest yet. What really befuddled me about this announcement was that that in addition to those two smaller, rocky worlds, there are three bigger gas-giant or super-earths in this system as well. No only that, but all five of these exoplanets’ orbits would fit inside our own Mercury’s orbit around our sun! That’s a lot of planets crammed into a tiny area! Of course that also means that these planets are scorching hot- far too hot to be habitable. But, it’s very reassuring to confirm that Kepler can positively identify alien planets that are earth-size and even tad bit smaller (Kepler 20e is about 87% the size of earth). As usual, Dr. Phil Plait at Bad Astronomy has a very good explanation of the whole thing. And I’ll also point you toward this article on space.com about the likelihood of us finding a true earth-twin within the coming year.

And now I will simply tell you to go take a look at this amazing set of volcano photographs and have a a few eyegasms. You’re welcome.