Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but unlike any in our own solar system.

Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...

We've known for over 30 years that there are other stellar systems in our galaxy, but we don't have any idea how many there are.

The leading explanation for all of these mysteries is known as the giant impact hypothesis. According to this story, when the solar system was just getting started, a Mars-size protoplanet named Theia ...

In a review paper, astronomers trace the impact orbit of observed meteorite falls ... Its First Direct Images of Carbon Dioxide Outside Solar System Mar. 17, 2025 — The James Webb Space ...

Space solar power, or what I like to call Starlink for electricity, is at once a ludicrous idea and a bit of a pipe dream.

It's rare for any observatory to directly image a planet beyond our solar system, called an exoplanet, but the powerful James Webb Space Telescope has captured four of them in the stellar system HR ...

Bothell, Wash.-based Portal Space Systems shows off the lab where its solar thermal propulsion system will be developed.

The Hypothesis of Laplace.According to Laplace, the solar system formerly consisted of a very much flattened mass of gas, extending beyond the orbit of Neptune, and rotating like a rigid body.

Just when you think Snapchat couldn’t get more creative, it drops something that gets everyone buzzing again. Yup, the same ...

Portal Space Systems has raised $17.5 million to accelerate the development of a space vehicle with a solar thermal ...