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 ...

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

Imagine a civilization so advanced that it can harness the energy of an entire galaxy, manipulate gravity, and explore ...

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, ...

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

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

Our sun is about five times less magnetically active than other sunlike stars—effectively a special case. The reason for this ...

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