Across the galaxy, astronomers now see that planetary systems fall into four broad classes, and our own solar system, part of the rare Ordered group, is only one of them. At the same time, discoveries ...

Scientists have grappled for centuries over the composition of the universe. From its infinite size to the search for intelligent life on planets beyond our own, a variety of questions keep humans up ...

New measurements of radio galaxies reveal that the solar system is racing through the universe at over three times the speed predicted by standard cosmology. Using highly sensitive data from multiple ...

Our Solar System orbits the galactic center at an estimated 792,000 kilometers per hour, taking 225 million Earth years to ...

The universe is supposed to look the same no matter where you stand. That idea, known as the cosmological principle, sits at the heart of modern astrophysics. It says matter spreads out evenly when ...

A planetary system is shaped at the boundary of order and chaos. It starts out as a molecular cloud—a big, cold clump of mostly hydrogen gas that can collapse to make stars. As central stars form, the ...

Samples collected from the asteroid Bennu are continuing the shed light on the origins of the solar system and how life ...

"We found that some comets in the inner Oort cloud form a long-lasting spiral structure." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Spirals ...