Galaxies

Mysterious matter may be colliding at the Milky Way's core.

A newly released image of one of our nearest galactic neighbors, Barnard's Galaxy, also known as NGC 6822, reveals regions of star formation and strange-looking nebulae, such as the bubble visible in the image [upper left].

Scraps of devoured dwarf galaxies surround the Milky Way's sister galaxy

An object hundreds or thousands of times the mass of the sun would represent an elusive class of black hole

Researchers may have found a precursor to today's galaxies, dating back to when the universe was in its infancy

A survey from on high confirms the far-flung source of a celestial infrared background

Yale astrophysicist Kevin Schawinski talks about Galaxy Zoo, a distributed computing project in which laypeople can help researchers characterize galaxies. And we tour Kroon Hall, the new green home of the Yale School of Forestry and Environmental Sciences. Plus, we'll test your knowledge of some recent science in the news. Web sites related to this episode include www.galaxyzoo.org; www.environment.yale.edu/kroon

Cosmologist Tamara Davis, an associate of the Dark Cosmology Center in Denmark, pulls together an answer

A new proposal contends that stars formed alongside our sun might be recognizable, even after billions of years of separation