Astronomers detect ghostly afterglow of cosmic explosion

For the 1st time, astronomers have detected the faint radio afterglow of a ghost explosion – a kind of cosmic sonic boom – possibly the result of a weird kind of gamma-ray burst.

Is Voyager 2 nearing interstellar space?

Voyager 2, launched in 1977, is now about 11 billion miles (17.7 billion km) from Earth. NASA says the spacecraft has detected an increase in cosmic rays, which might mean it’s close to becoming only the 2nd human-made object, after Voyager 1, to enter interstellar space.

Meet Proxima Centauri, closest star to sun

The star Proxima Centauri, one of 3 stars in the Alpha Centauri system, is our sun’s nearest known neighbor at 4.2 light-years away.

Hubble is in safe mode. Science operations suspended

The Hubble Space Telescope has been in safe mode since last Friday evening, following the failure of one of the gyros that helps stabilize it. NASA is analyzing the problem and hopes to resume operations soon.

See it! SpaceX night launch and landing

Night launches are always fun, and this the October 7 launch by SpaceX – from Vandenberg Air Force Base, north of Los Angeles, California – generated more than its fair shares of awesome images.

Construction begins on ESA’s Plato planet-hunter

The European Space Agency’s next big planet-hunting mission – the Plato space telescope – will continue the search for rocky and potentially habitable worlds orbiting other stars.

Watch, as black holes spiral closer

A new simulation by scientists lets you witness supermassive black holes about to collide. One shows them from outside the system, just 40 orbits from merging. The other places you in their midst.

Groundbreaking science from ultra-close orbits of Saturn

Last year, in its Grand Finale, the Cassini spacecraft dove repeatedly between Saturn and its rings. This week, 6 teams of researchers published new research based on Cassini’s final days and those daredevil dives.

New dwarf planet nicknamed The Goblin

The Goblin is a very small dwarf planet, very far away. It might help astronomers in their search for a much bigger world – the long-sought Planet X.

Did the Hubble telescope find the 1st exomoon?

Astronomers have tantalizing new evidence for a possible Neptune-sized moon orbiting the gas-giant planet Kepler-1625b, some 8,000 light-years away.