In an extraordinary celestial event, the interstellar comet 3I/ATLAS has made its presence known as it passed by Mars last week. This rare phenomenon marks only the third confirmed instance of an ...

Jupiter is the largest planet in the solar system and the fifth planet from the sun. The gas giant features beautiful banded cloud layers, a set of thin, dusty rings, the famous Great Red Spot and ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

A mysterious object traveling through our solar system may have emitted a signal, according to a scientist. This enigmatic ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...

The inner solar system spins much more slowly than the laws of modern physics predict, and a new study may help to explain why. A thin disk of gas and dust — known as an accretion disk — spirals ...

How big it is: 865,000 miles (1.392 million kilometers) across How far away it is: 93 million miles (150 million km) What type of star it is: A yellow dwarf star The sun is the star at the center of ...

Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of "Ask a Spaceman" and "Space Radio," and author of "How to Die in Space." Sutter contributed this article to ...