They have discovered a planet that they think is covered

 in erupting volcanoes. An international team of researchers claimed to have found

Earth-sized exoplanet, which they believe may have water on some of its surface

in a report that was published on Tuesday in the journal Nature.

The dullly named LP 791-18 d

which should have been called Mustafar, is situated around 90 light-years away from Earth.

The planet LP 791-18 d doesn't have a day and night cycle like Earth.