Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published ...

Thousands of sun "twins" spotted by a space telescope could shed new light on how our star came to host at least one life-friendly world — and a big stellar migration was involved. Researchers used ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

Scientists found proof that a giant early planet existed in the solar system 4.5 billion years ago.

The solar system is the abode of humans. However, very little is known about its origin. A recent finding by the Atacama Large Millimeter/submillimeter Array (ALMA) and James Webb Space Telescope ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

About 4.6 billion years ago, a celestial cloud collapsed, paving the way for our solar system to form. Then, a nebula with strong gravitational pull took shape, kick-starting the birth of the sun. But ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...

Astronomers have confirmed, for the first time, a trans-Neptunian object with a thin atmosphere—something previously thought exclusive to Pluto among similar objects. Trans-Neptunian objects (TNOs) ...