NASA Spies Earth-Sized Exoplanet Orbiting Sun-Like Star

An anonymous reader writes: NASA has announced that a new Earth-like planet has been discovered that may be the closest thing yet to a first true "Earth twin." Kepler 452b is located 1,000 light years away, is 60% larger than Earth, and orbits Kepler 452 at a distance similar to that between Earth and the Sun. "It is the first terrestrial planet in the habitable zone around a star very similar to the Sun," says Douglas Caldwell, an astronomer at the SETI Institute in Mountain View, California.

Comments

Re:2 time the gravity thought

[CrimsonAvenger]

And I repeat: from TFA, mass of the planet is 5x Earth Mass. Diameter (and radius) is 1.6x Earth.

Insert 5x mass and 1.6x radius into Gm/r^2, and you very quickly realize that:

1) density isn't the same as Earth's. It is, in fact, a.25x Earth density.

2) surface gravity will be ~2x Earth (1.95+g).