Science Updates - A look at CfA discoveries from recent journals

November 16, 2018

The path of light is bent by mass, an effect predicted by Einstein's theory of gravity, and when a massive galaxy or cluster lies along our line-of-sight to a more distant galaxy its matter will act as a lens to image the light from that object.

bright cluster galaxy Abell 2597
November 9, 2018

Most galaxies lie in clusters containing from a few to thousands of other galaxies. Our Milky Way, for example, belongs to the Local Group cluster of about fifty galaxies whose other large member, the Andromeda galaxy, is about 2.3 million light-years away.

artist's conception of a dust belt around a bright star
November 2, 2018

Stellar variability has long offered insights into stars' physical properties. The star Mira (Omicron Ceti), for example, was so-named in 1596 by Dutch astronomers who were amazed by its miraculous brightening because of what we now know to be due to periodic changes in its size and temperature.