For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare ...

Don't miss this chance to see all seven of our solar system neighbors in the sky at the same time. The planetary alignment ...

the gravitational pull of our solar system's planets and passing stars do not have much of an effect on the Oort Cloud. The ...

Most of the long-period comets in the Solar System come from the outer Oort Cloud. The inner region is much more stable. It's ...

Another plane-sized space rock, known as the "2025 DY5" and measuring about 92 feet across, will zip past our planet this ...

The space rock, which measures 150 feet across and is traveling at 38,922 miles per hour, is one of five on NASA's radar.

Starting Friday evening, a rare alignment of the planets will allow observers to see all seven planets in the Solar System, visible without optical aids, making it a unique opportunity for ...

ESA's Solar Orbiter has begun to leave the orbital plane of the solar system and will soon be the first probe ever to look at the poles of the sun. The European Space Agency announced this on ...

The Milky Way's tidal forces may be shaping the Oort Cloud's inner structure into a spiral shape.

The spiral runs perpendicular, or at an angle of 90 degrees, to the plane of the Milky Way ... believed to mark the outer boundary of the solar system and is the source of comets that visit ...

Most of the planets are aligned in our night sky right now, providing a treat for skywatchers. Are such "planetary parades" ...

The farthest spacecraft from Earth are shutting off instruments in interstellar space, but their mission in interstellar ...