Nearly 11 billion years ago, the universe churned out stars at a rate 10 times greater than today. And yet all the starlight in the cosmos appears no brighter than a 60-watt light bulb seen from miles away.

Clues hidden in today’s orbits hint at the violent origins of the solar system — and a rogue giant kicked out long ago.

Exoplanet Kepler-1625b might harbor a moon the size of Neptune—potentially the first confirmed exomoon—but researchers urge caution in interpreting the data.