Galaxies

Bring Science Home: Activity 14

Researchers from a number of overlapping disciplines are awaiting a big boost from the world's largest particle collider

The ambitious, unprecedentedly vast Square Kilometer Array project should open up new realms in astrophysics. But will it live up to its name?

Our understanding of dark matter says the Milky Way should have many times more than its dozen or so small satellite galaxies. John Matson reports

An Italian research group has for years trumpeted a cyclical ebb and flow in particulate activity that the researchers ascribe to dark matter. But support for the claim has been hard to come by

By the latest estimate, the observable universe contains 200 billion galaxies. Astronomers wonder: Why so few?

Letters to the editor from the January 2011 issue of Scientific American

Two 30,000 light-year-long blobs called Fermi bubbles have been discovered on either side of our galactic plane. John Matson reports

This image of two interacting galaxies, called Arp 273, has been released by the organization that operates the Hubble Space Telescope in celebration of the 21st anniversary of its launch into space.