There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

We actually know very little about what's going on inside Uranus and Neptune, causing researchers to propose that these ...

“Overall, our findings challenge the conventional classification of Uranus and Neptune as ’ice giants’ and underscore the ...

Voyager 1 has been exploring the cosmos for decades, but when it reached the edge of the solar system, it found something ...

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 ...

Orbiting between Mars and Jupiter is an enormous ring of space rocks. The region, known as the asteroid belt, is home to an estimated 1.9 million asteroids that are larger than 1 kilometer in diameter ...

A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?

Since the 1970s, Voyager 1 has been making groundbreaking discoveries. But its journey is far from over, and it's still ...

Voyager 1 is about to go where no human-carrying spaceship has gone before. June 15, 2012— -- Fifty-five years after humans first escaped the bounds of Earth and launched a satellite into orbit, ...

Even astronomers who study peculiar outer space objects have their favorites. Here are some interstellar bodies that have won ...

The official number of planets outside our solar system has reached 6,000, according to space scientists. NASA's tally of exoplanets does not include more than 8,000 additional candidate planets ...

From lava worlds to gas giants, NASA says the variety of these worlds is staggering—and that signs of a further 8,000 distant ...