In 2008, astronomers detected an unexplained bright object located 25 light-years from Earth in the Piscis Austrinus ...

New research suggests Earth's Moon formed from the catastrophic collision of our planet with its "sister" planet, Theia, born nearby. This "sibling" planet theory, supported by iron isotope evidence, ...

The CRASH Clock is a new metric for measuring the risks of satellite congestion in low-Earth orbit. Its calculations are ...

Earth orbit is becoming increasingly crowded. With more than 11,000 active satellites and many thousands more expected in the coming years, as well as more than 1.2 million pieces of space debris ...

The moon has been Earth’s constant companion for approximately 4.5 billion years, escorting the planet during its myriad journeys around the sun. While its origins are a little hazy — it cannot be ...

Two rare cosmic collisions around the young star Fomalhaut were caught by space telescopes, offering new clues about how planets form.

Two cosmic collisions near the star Fomalhaut solve the mystery of a disappearing "planet" and show rare planetesimal crashes ...

In an unprecedented celestial event, NASA's Hubble Space Telescope (HST) captured the dramatic aftermath of colliding space ...

Around 4.5 billion years ago a giant object around the size of Mars crashed into the proto-planet Earth, called Theia. This ...

"A single collision could have catastrophic long-term consequences," the authors explain, and we would not have long to avoid ...