A rare natural laser beaming from the heart of the spectacular Ant Nebula suggests the presence of a double star system.

One World Trade Center - aka Freedom Tower - is the main building of the rebuilt World Trade Center complex in Lower Manhattan, New York City.

Summer is a great time to frolic in the woods, but look out for poison ivy, oak, and sumac! Top tips for summer itch-prevention.

"After the Wright Brothers proved 117 years ago that powered, sustained, and controlled flight was possible here on Earth, another group of American pioneers may prove the same can be done on another world."

Mysterious asteroid 2015 BZ509 - currently nestling in Jupiter's orbit - became less mysterious once astronomers realized it's an immigrant, captured from another solar system.

This object was likely born in the Asteroid Belt between Mars and Jupiter, then flung billions of miles to the Kuiper Belt on the edge of the solar system.

Photographer Karthik Easvur reminds us that our galaxy's center is 25,000 light-years away. So light from the galactic center that reached the sensor of his camera started its journey 25,000 years ago.

Starting tonight and for the next several days, notice the moon's orbital motion as it sweeps by the star Regulus, the Heart of the Lion in the constellation Leo.

A large explosion happened on May 18 at Hawaii's Kilauea Volcano, and, at that time, the 1st serious injury was reported. USGS warned of the release of toxic gases in a plume called a laze, which happens when molten lava hits sea water. Images and videos here.

How many unseen worlds orbit these stars? The TESS planet-hunter is designed to find nearby exoplanets, between 30 and 300 light-years away.