1 AU is the average distance between the Earth and the Sun and is approximately equal to 150,000,000 km (or 1.5 × 10 11 m). Distances between the Earth and other stars and galaxies are measured ...

an object that's between a planet and a star. The latest research builds on existing observations by NASA's Hubble and Spitzer space telescopes. "We already knew that it varies in brightness ...

The universe can be a beautiful but violent place. A new image from the Webb space telescope captures an epic battle between two stars as they launch jets of material toward one another ...

While it may not look like it, the interstellar space between stars is far from empty. Atoms, ions, molecules, and more reside in this ethereal environment known as the Interstellar Medium (ISM).