hot jupiter

Exoplanets that are near their star may have been pushed there

By Jason Arunn Murugesu

We may now know why some hot Jupiters have such narrow orbits

Asar Studios / Alamy

The extremely short 10-day orbits of hot Jupiter can be explained by the fact that the planets are born under a high density of stars.

Hot Jupiters have long puzzled astrophysicists. As the name suggests, they are planets similar in size and appearance to Jupiter – but, unlike Jupiter, they are very close to their star, meaning they only take a few days to complete an orbit.

Andrew Winter from Heidelberg University and his colleagues used data from the European Space Agency’s Gaia mission …