Called 3I/ATLAS, the comet is only the third of its kind known to astronomers, and it’s likely been heading our way for billions of years, carrying pristine material from another star system ...

Voyager 2 launched in 1977 to tour the outer planets. It visited Jupiter, Saturn, Uranus, and Neptune, returning data that transformed scientific understanding.

Astronomers have discovered a brand new type of planet outside our solar system that, even in its infancy, is already bigger ...

The planet is a gas giant about the size of Jupiter. At just 5 million years old, it is still considered an infant compared with our 4.6-billion-year-old solar system.

As the next-generation observatory moves closer to its 2027 launch, engineers successfully deployed the mission-critical solar panels and a massive sunshade that will help it peer into the universe’s ...

The death of the Sun is often thought of as the end of the solar system. But in reality, it may be the beginning of a new phase of life for all the objects living in the solar system. When stars like ...