We typically think of the Oort cloud as scattered ice balls floating far from the sun, yet still tied to it gravitationally.

In 1974, science fiction author Larry Niven wrote a murder mystery with an interesting premise: Could you kill a man with a ...

Artist's concept of light flares along Sag A*'s accretion disk. (Credit: NASA, ESA, CSA, Ralf Crawford (STScI)) ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

The Orion Nebula is one of the best “must-see” attractions in the sky, and it’s even more impressive once you get to know ...

A galaxy cluster once thought to be “dead” is unexpectedly forming stars at an astonishing rate, challenging established ...

Data from the Esa Euclid telescope enable precise analysis of an Einstein ring around the galaxy core of NGC 6505 and thus the surrounding dark ...

The Orion Nebula is one of the best must-see attractions in the Pottsville sky, and it is even more impressive once you get ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.

This NASA/ESA Hubble Space Telescope image depicts the cosmic tangle that is MCG+05-31-045, a pair of interacting galaxies located 390 million light-years away. UGC 1810 and UGC 1813 are spiral ...

China has managed to deliver a pair of satellites into lunar orbit despite the spacecraft initially being stranded in low ...