Will we ever know the true nature of 'Oumuamua, the first interstellar visitor?
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.
Explore the planets in our solar system: Earth, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune