Discover the order of planets in the solar system. From Mercury to Neptune ... system formed about 4.6 billion years ago from a giant rotating cloud of gas and dust known as the solar nebula.

Jupiter is our solar system's largest planet. The two brown dwarfs are gravitationally ... It would therefore be on an orbit that is inclined at 90 degrees to the rotation axis of the Earth," said ...

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new ...

but both men previously suggested a “Planet X” existed in the far reaches of the solar system. “It’s kind of fun that a paper that purports to find a candidate for Planet Nine is really ...

Astronomers have found new evidence that a mysterious ninth planet may be hiding at the edge of the solar system - rewriting what we know about the cosmos again. An international team from Taiwan ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...

Astronomers claim to have discovered a new ninth planet in our Solar System. Planet Nine, also known as Planet X, is a hypothetical celestial object that would distantly orbit our Sun – but ...