Kepler 10b

This newly-discovered planet whips round its star in less than an Earth day. Scientists used starquakes (starquakes!) to find out a little more about it, and they found that not only is it tiny, but it is also made of rock, just like our inner solar system. It is a hot-lava planet. A Confirmed Rocky [...]

Kepler 10B - Artists' Concept (Credit: NASA)
This newly-discovered planet whips round its star in less than an Earth day. Scientists used starquakes (starquakes!) to find out a little more about it, and they found that not only is it tiny, but it is also made of rock, just like our inner solar system.
It is a hot-lava planet.
A Confirmed Rocky Planet
I should mention that this planet is not Earth-like. Over the past couple years I’ve been hearing the phrase “most Earth-like planet ever discovered” bandied about by various news organizations, including some science press releases.
There’s a lot that goes into making a planet Earth-like.

Size: In the case of Kepler 10b, it is very small, less than half again the size of the Earth. There is nothing in our solar system nearer to this size than the Earth itself.
Composition: ...