Known as noctilucent clouds, these shimmering, electric-blue formations hover roughly 50 miles above Earth, far higher than typical clouds. They are most commonly seen between late June and early ...

Saturn will rise above the eastern horizon beneath the stars of the constellation Pisces shortly before midnight for viewers ...

When millions of people turn off their lights for Earth Hour each year, something remarkable happens in the night sky above ...

A surprising discovery at the heart of the Milky Way is forcing scientists to rethink how massive structures called Fermi ...