IT’S been nearly 40 years since the first planet outside of our Solar System was discovered. Since then, more than 5,800 ...

Planets change orbit shape around Neptune’s size. Metal-rich stars help giant planets form. Eccentric orbits suggest chaotic planet formation.

How does a planet’s size influence its orbit around its parent star? This is what a recent study published in the Proceedings of the National Academy | Space ...

Studying the orbits of thousands of exoplanets shows that large planets tend to have elliptical orbits, while smaller planets tend to have more circular orbits. This split coincides with several other ...

Our quest to find a “second Earth” has long occupied scientists and dreamers alike. The possibility of another world ...

Astronomers have discovered nearly 6,000 planets beyond our own solar system. Here's how — and how we'll find even more.

Conquer Space! A space themed grand strategy set in the present to near future, with emphasis on economics, politics, and society, with realistic orbital mechanics.

One is 69 percent the mass of the sun and the other only 20 percent. Kepler-16b orbits around both stars every 229 days, similar to Venus’ 225-day orbit, but lies outside the system’s habitable zone, ...

There's a lot less sky and a lot more moon in view for Firefly Aerospace's "Ghost Riders in the Sky" mission. Firefly's lunar lander, named Blue Ghost, entered orbit around the moon last week ...

Shields stressed that this results in a much faster rotation period – 10 hours – for the white dwarf exoplanet, while Kepler-62’s exoplanet has a 155-day rotation period. While both planets would ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...