Astronomers have proposed lots of ideas to explain 'Oumuamua's odd characteristics, and we're unlikely ever to find out which one is correct.
Our solar system is filled with planets, asteroids, comets, the sun and more, making it a wealth of discoveries waiting to be found. See the latest discoveries from across our solar system here.
Nicolaus Copernicus proposed his theory that the planets revolved around the sun in the 1500s, when most people believed that Earth was the center of the universe.
Before Earth and the other planets in our solar system existed, the sun may have been surrounded by giant rings of dust similar to Saturn's, according to a new study.
Earth and Mars must have formed from collisions between giant moon-sized rocks rather than from clumping together of a huge amount of tiny pebbles, a new study found.
The solar system formed about 4.5 billion years ago. Scientists have developed three models of how it happened.
So you've heard that an asteroid could slam into Earth wreaking all sorts of havoc, but just how many space rocks out there threaten our planet?
One of the strangest comets in the solar system has been erupting with unpredictable bright outbursts since late September and nobody knows why.
The detection of interstellar objects in the solar system has raised an interesting question: How much of the solar system is made of foreign material?
A few decades from now, humanity could get an up-close look at a comet blazing to life for the first time.
Scientists have used a new method to analyse the composition of ancient grains in meteorites with unprecedented accuracy to shed light on their mysterious origin.
The BepiColombo mission captured its first up-close look at the planet Mercury in a flyby, revealing a rocky world covered with craters.
About 4.5 billion years ago, the solar system was just a giant, spinning cloud of gas and dust. Today, it's flat. Here's how that happened.
How rare is our solar system? In the 30 years or so since planets were first discovered orbiting stars other than our sun, we have found that planetary systems are common in the galaxy.
Comets from other star systems, such as 2019 Borisov, visit the sun's neighborhood more frequently than scientists had thought, a new study suggests.
The newfound asteroid 2021 PH27 completes one lap around our star every 113 Earth days. That's the shortest orbital period of any known solar system object except the planet Mercury.