An 11-year Hubble study has finally revealed how long a day lasts on Uranus.

The bright band of the Milky Way and the faint glow of "zodiacal light" meet above the mountains of Chile's Atacama Desert in this stunning night sky photo.

Veteran astronaut Michael Fincke's sudden medical emergency aboard the ISS is a stark reminder that, as NASA pushes toward long-term lunar missions, astronaut health remains one of spaceflight's biggest unknowns.