They’ve long assumed that things formed more or less where they ... much closer together than the planets in our solar system. Some are Jupiter- or Neptune-size worlds that race on insanely ...

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because even though these things are probably in our solar system, they're just a tiny, tiny fraction of all the asteroids and other objects that are out there," said Wiegert. In fact, according ...

However, we actually have six in our Solar System. Pluto, Ceres, Makemake, Haumea, and Eris were the only five that we knew about up until very recently. Ceres is in the asteroid belt between Mars ...

Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but unlike any in our ...

"These objects really could be anywhere in the solar system at any given time." One million alien visitors from another star system could already be lurking in the solar system. We aren't talking ...

Jupiter is the biggest planet in our Solar System, and it gets its name from ... extremely important - that the planets could orbit things other than Earth. The Polish mathematician and astronomer ...

And tantalizingly, what they found suggests that our solar system may already be flooded with visitors from the star system, which is about 4.25 light years away. These objects range from ...

things that look nothing like our own solar system. "Every time we think we really understand planet formation, we learn something new. And this is going to just keep happening over the next ...

Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune — will come into a rare but powerful planetary alignment, often referred to as a parade of planets. How the planetary parade could affect ...

"We're trying to encounter an astronomical object that streaks through our solar system just once and we don’t want to miss the opportunity." In 2017, scientists spotted our solar system's first ...