They also weigh about the same, with Neptune coming in at 1.024 x 10^26 kg (about 17 times the mass of Earth) and Uranus weighing 8.682 x 10^25 kg (about 14 times the mass of Earth). What's more ...

Astrophysicists have once again enriched our knowledge of the cosmos with a new discovery: two small planets orbiting ...

A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system ...

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...

What can a star’s behavior teach scientists about the formation and evolution of sub-Neptune exoplanets, which comprise one ...

Earth's year, of course, is 365 days, while at the upper end, Neptune takes a whopping 60,190 days, or about 165 Earth years, to complete a single revolution of our star. The different speeds of ...

Neptune is an ice giant, composed primarily of hydrogen, helium, and methane, with a hot, dense fluid of icy materials above a small rocky core. Neptune has 14 known moons and at least five main rings ...

"Based on our predictions, up to about 1% of super-Earth and mini-Neptune systems could host Earth-like planets within the habitable zone of their stars. While this fraction is relatively low ...