These linkups happen when several planets appear to line up in the night sky at once. Such parades are fairly common, ...

Beyond the familiar planets lies a fascinating frontier filled with icy worlds, mysterious orbits, and cosmic curiosities.

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

How do tidal forces shape a planet's orbital evolution, especially for those in the habitable zone? A recently submitted ...

Without other planets or the Moon, Earth would lose tides, gravity stability, and the conditions necessary for life.

Researchers suggest gas giants might gather dark matter until their cores collapse into planet-sized black holes.

In February 2025, a stunning planetary alignment–also known as the planet parade–allowed observers to see seven planets in the night sky simultaneously: Mercury, Venus, Mars, Jupiter, Saturn, Uranus, ...

A planetary parade of six planets is visible in the morning sky through August 20, with Mercury joining Venus, Jupiter, ...

Skywatchers who saw the Venus-Jupiter conjunction saw the start of an upcoming "planet parade" in the eastern sky. Here's ...

Penn State astronomers are using data from NASA’s James Webb Space Telescope, combined with theoretical models, to ...

In a new study, researchers at Penn State and NASA’s Jet Propulsion Laboratory analyzed when and where human deep space ...