The quiet life of Messier 94

Just like a murder of crows, a shrewdness of apes and a murmuration of starlings, tightly packed stars of a similar age within the center of a galaxy have a collective name: a bulge.

Astronomers discover how galaxies form through mergers

Astronomers in the UK announce today that have established how galaxies like our own Milky Way formed over 10 billion years of cosmic time through an abundance of separate galaxies colliding together.

The unfolding story of a kilonova told in X-rays

Astronomers may have detected a "sonic boom" from a powerful blast known as a kilonova. This event was seen in GW170817, a merger of two neutron stars and the first object detected in both gravitational waves and electromagnetic ...

A new spin on the blue stellar sequence

Some humans try to look younger than they really are—stars do, too. This is reported by an international team of astronomers in a paper just published in Nature Astronomy.

Image: Hubble captures swirling galactic trio

The mass of dust and bright swirls of stars in this image are the distant galaxy merger IC 2431, which lies 681 million light-years from Earth in the constellation Cancer.

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