Discovered over the summer, the comet known as 3I/Atlas will pass within 167 million miles of our planet on Friday. That's as ...

The interstellar comet will pass safely by Earth, giving astronomers their best chance to study it up close. Interstellar ...

The comet will come much closer to Jupiter in March, zipping within 33 million miles. It will be the mid-2030s before it ...

The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

While the 21st century has been bumpy, it has also ushered in monumental scientific and technological breakthroughs that have ...

Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

Hot Jupiters were once cosmic oddities, but unraveling how they moved so close to their stars has remained a stubborn mystery ...

The galaxy’s most common stars may be missing a key ingredient for life: Long-lived moons. Most stars in our galaxy are small ...

Even the best telescopes can’t see exoplanets. It’s all about watching for jiggly stars, blue shifts, and transits.

H anuman is swinging joyfully from vine to vine in the Kishkindha forest when he stops mid-swing. Below him, resting against ...

Earth is the only life-supporting planet in our Solar System. Until now. Today, we're bringing Kepler 22-b into our planetary ...

Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around (peri) the sun (helios).