Using adaptive optics, a new solar telescope in the Canary Islands is taking the best-ever pictures of the Sun.
Astronomers have clocked a star orbiting the black hole at the Milky Way's center, revealing its mass.
A three-hour long burst on a neutron star has confirmed many long-suspected fact about the dense, spinning stars.
Ultrahigh energy cosmic rays may come from quasars that were thought to be retired.
Neutrinos have mass, they change identity when passing through matter, and the Standard Model of particle physics is wrong. New results from the Sudbury Neutrino Observatory (SNO) in Canada leave no room for other conclusions. The results, announced on April 20th at a joint meeting of the American Physical Society and the American Astronomical Society…
Like a giant comet, the "hot Jupiter" crossing the face of the star HD 209458 is blowing off vast clouds of hydrogen.
Most asteroids are just pieces of their former selves. Now astronomers have traced back 39 of them to one collision.