The four planets of the Kepler-223 star system appeared to have little in common with the planets of our own solar system today. But a new study using data from NASA’s Kepler space telescope suggests ...

It’s finally happening. NASA has announced that its Kepler telescope may have seen its last exoplanet, as the spacecraft has now all but run out of fuel. The rest of this article is behind a paywall.

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Fluff surrounds the solid interiors of each of the three planets in the Kepler 51 star system. Each of these planets was discovered to have masses "only a few times larger than Earth's" with radii ...