A planet with no star to call its own found a temporary home on Earth last year.
Astronomers have now estimated the planet’s weight, as well as other basic characteristics that describe it as a smaller and lighter sibling of our own giant…

A planet with no star to call its own found a temporary home on Earth last year.
Astronomers have now estimated the planet’s weight, as well as other basic characteristics that describe it as a smaller and lighter sibling of our own giant…