These are known as hypervelocity stars, with some moving faster than the escape velocity of the Milky Way of around 600 kilometers (373 miles) per second. There is another star that is almost as ...

The shrinking area typically moves off of Earth, meaning our planet is no longer in that potential impact area. This happened with the asteroid Apophis — a 1,100-foot-wide behemoth that once had ...

Data collected from a once-defunct NASA satellite show that Earth grew two extra radiation belts following a supercharged ...

Quipu, Hercules, Serpens–Corona Borealis and Sculptor–Pegasus are all larger than the fifth and final superstructure ...

Astrophysicists have long theorized that there should be planets out there that are, in size, somewhere between Earth and ...