Galaxies

Newly discovered lobes stretch tens of thousands of light-years above and below the Milky Way's disk. Where did they come from?

Astronomers get closer to an explanation for the unexpected abundance of gamma rays at the core of our galaxy

The recently discovered small galaxy Leo P contains only about a hundred-thousandth as many stars as the Milky Way, but it's bucking the small galaxy trend by continuing to make new ones

The presence of the gas could have implications for theories of the early solar system

Astronomers have detected faint light that dates from shortly after the big bang

Gravitational waves from the most promising black hole binary system candidate yet could help shine a light on how these monsters at the hearts of galaxies merge

A galactic satellite reveals where some of our galaxy's elusive material is hiding 

Research reveals today's produced energy is only about half of what it was 2 billion years ago

Private funding for the Arecibo Observatory—the largest single-dish radio telescope in the world—may be a poison pill

With a $100-million donation, billionaire Yuri Milner plans to revolutionize the astronomical quest to find alien life

Astronomers have discovered more than 800 so-called "ultradiffuse galaxies" that are virtually invisible because they have relatively few stars and are mostly dark matter. Clara Moskowitz reports

As the legendary space telescope enters its twilight years, astronomers are searching for a replacement, but no one agrees about what it should accomplish