Hubble captures three infant stars lighting up a blue nebula, with a secret protostar forming in a shadowed disc below.

Globular cluster M15 hides within it a planetary nebula, Pease 1. Observers with large scopes and steady skies can find it.

Using a new imaging technique, the researchers successfully captured more than one thousand colors that identified specific celestial objects like 500 planetary nebulae, which are responsible for the ...