Hidden exoplanets may trigger auroras on distant stars

Unveiling the Fate of Ultra-Short Period Exoplanets

It's difficult to tell what a planet is made of without drilling in, but finding habitable exoplanets that have the "right stuff" for life may be easier if we look at chemical abundances in the star to confirm there's iron or carbon present in the system.

'Powerful auroras' on alien planets may be sending strange radio signals toward Earth