When Galaxies Collide
Images from the Spitzer Space Telescope and GALEX make it possible for scientists to imagine what the Milky Way-Andromeda crash might look like five billion years from now.
More Ado about the Cas A Supernova
Legend has it that a bright noon star graced the birth of the 17th century British Monarch Charles II. Could it have been a daytime glimpse of the Cas A supernova?
Dissecting Saturn's Big Storm
Scientists have combined images from Cassini and big telescopic eyes in Chile to understand Saturn's massive storm in ways never before possible.
Gravity Probe B: Relatively Important?
It took five decades and $750 million for the Gravity Probe B mission to check, once again, that Einstein’s theory of general relativity is right. Was it worth it?
The Hottest, Densest Super-Earth Yet
Two research teams combine forces to study the wildest exoplanet yet identified.
