Gas Cloud near Eta Carinae (artist's impression)

This is an artist's impression of a gas cloud (left) that acts as a natural ultraviolet laser, near the huge, unstable star Eta Carinae (right) - one of most massive and energetic stars in our Milky Way Galaxy.

This is an artist's concept of a gas cloud (left) that acts as a natural ultraviolet laser, near the huge, unstable star Eta Carinae (right) -- one of most massive and energetic stars in our Milky Way Galaxy.