Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

The city of Flagstaff has taken big steps to preserve the clarity of its night sky. Find out the best ways to experience the ...

A chunk of space rock that visited near Earth's orbit last year was widely called a "mini-moon," a nickname that was more ...

The study analyzed the circumstellar disks of a pair of stars, learning about how planets are formed from some unexpected ...

An asteroid that orbited near Earth for a few months as a mini-moon may be a chunk of the moon that was blasted off by an ...

PT5, which almost became a temporary mini-moon to Earth, was recently found to be a broken-off part of the moon itself. This ...

For a brief, but exciting, time last year, Earth had two moons. A small asteroid lingered close to our planet in its orbit ...

For a few months, Earth had a second moon — a tiny asteroid that may have been a piece of our own Moon ...

Starting at 12:30 p.m. ET (1730 GMT) on Saturday (Jan. 25), astrophysicist Gianluca Masi of the Virtual Telescope Project ...

PT5, a near-Earth object discovered last year, has captivated scientists with its potential lunar origins. Likely ejected ...

However, this almost-mini-moon is still special as it is potentially a piece of the real moon, said Dr. Teddy Kareta, a postdoctoral associate at Lowell Observatory in Arizona. Kareta is the lead ...