Look Upwards

These fast-moving knots remain one of the many mysteries of planetary nebulae

Astronomers don’t fully understand the lithium abundances of the Milky Way. An exploding white dwarf called Nova Centauri 2013 might be…

A tale written in carbon, calcium, magnesium and nickel.

How a lucky discovery revealed the creative side of active galactic nuclei.

Here’s how astronomers might have discovered a stellar companion to LL Pegasi — without even seeing it.

Astronomers almost detected an enormous satellite galaxy made of dark matter. Almost.

If you live in the southern hemisphere, you might be able to see an interesting star called Achernar — or, to use the scientific…

The Phoebe ring might have played a key role in transforming the surfaces of Iapetus and Hyperion.

Starbursts, active galactic nuclei, and more — these strange transitional galaxies have it all. What’s going on?

A blue dwarf galaxy only 59 million light-years away may harbor cousins of the mysterious Population III stars.

An unassuming galaxy hides a secret 15 million light-years long.