This never-before-seen phenomenon could help explain what comprises dark matter
The ALMA telescope array glimpses a far-distant galaxy through an Einstein ring
A galaxy 12.5 billion light-years away gives off the light of 300 trillion suns, because its feeding black hole produces enough heat to set the whole galaxy's dust glowing. Lee Billings reports ...
Explosive geysers of material that shoot away from black holes at nearly the speed of light seem to form more often in galaxies that are the product of two galaxies merging together
The Thirty Meter Telescope can revolutionize astronomy and become a part of the holy mountain’s rich cultural heritage
The embattled Thirty Meter Telescope project can proceed on Mauna Kea, but only by cutting back astronomy elsewhere on the mountain
Galaxies in every corner of the universe have been sending out photons, or light particles, since nearly the beginning of time. Astronomers are now beginning to read this extragalactic background light...
Astronomers have found what may be two supermassive black holes in a quasar due to become one in roughly 21 years
Astronomers use Kepler telescope to study weather on Jupiter-size planets beyond our solar system
High-energy photons from the Milky Way’s core suggest dark matter may soon be found by the world's most powerful particle accelerator
A vast region of space colder than expected is also largely devoid of galaxies, and the two observations are no coincidence. Clara Moskowitz reports
Controversy swirls around a bold proposal for a bigger, better—and expensive—replacement for NASA’s premier space telescope
Two prominent scientists update our view of the history of life on Earth, featuring the prominent roles of oxygen and carbon dioxide, and question claims that it is fairly easy to initiate life—even on a planet such as ours...
On April 30, if all goes well, after running out of fuel to fight off orbital decay NASA’s long-running MESSENGER spacecraft will end its mission to Mercury by crashing into the planet’s surface at nearly 4 kilometers per second...
NASA’s iconic space telescope has delivered gorgeous astronomical pictures for a quarter century, but some of its keystone discoveries come from far more humble images. Here are Scientific American ’s top 10...
Scientists and astronauts recall the telescope’s finest hours as well as threats to its 25-year existence
The telescope’s chief scientist started work on the project in 1972, garnering support for the world's first telescope free of Earth's atmosphere's blurring effects
As the famous telescope turns 25, scientists who have worked on the project chose their favorite pictures
Imagine a trio of aerobatic aircraft. Over the years they've gotten very good at their routine. But they want to add another five or six or seven members.
Astronomers watching galaxies collide found evidence of nongravitational forces that could suggest dark matter interacts with itself