3D sky: How astronomers measure the size, luminosity and distance of stars

SOFIA flying observatory, which carried a 2.5-meter telescope aboard a modified Boeing 747SP airplane, has taken its final flight. Astronomers celebrate SOFIA's accomplishments and lament the loss of the unique window into the universe it provided.

Astronomers discover traces of 'super-supernovas' that destroyed earliest stars

Astronomers discover traces of 'super-supernovas' that destroyed earliest stars