The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Does our Solar System have 9 planets or only 8? Astronomers have gone back and forth on that a lot, with Pluto now being classified as a dwarf planet. However, out beyond Neptune there could be ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

The planetary parade in February 2025 will see five bright planets in clear view and a special alignment of Mercury and ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

An event called a "ring plane crossing" will occur between Saturn and Earth on March 23, 2025, when Saturn's rings will ...