How can some planets be hotter than stars?

[Eldorado]

For example, data from the Kepler mission has shown that large, gaseous exoplanets can orbit very close to their star – rather than far away from it, as is the case in our Solar System, causing them to reach temperatures exceeding 1,000K (727°C). These have been dubbed “hot” or “ultra-hot” Jupiters. And while most other exoplanets are smaller, between the size of Neptune and Earth, we don’t know much about their composition.

But how can hot, gaseous planets form and exist so close to their star? What kind of extreme physical processes happen here?

Full article at The Conversation: Link