An curved arrow pointing right. 55 Cancri e – a planet eight times the size of Earth – is 40 light-years away. Astronomers just found out what its air is made of. Produced by Matthew Stuart.

The record-breaking planet is five times the Earth's size giving us an example of the wonderful variety of planets in the universe. The star-orbiting time for 55 Cancri e takes just 17 hours ...

55 Cancri e is one of five known planets orbiting a sun-like star in the constellation Cancer. With a diameter nearly twice that of Earth and a density slightly greater, the planet is classified ...

An curved arrow pointing right. Astronomers were recently able to map the temperature of 55 Cancri E — a Super-Earth 40 light-years away — and discovered half the planet is almost completely ...