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

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 ...

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

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

Stargazers will be treated to a dazzling six- and seven-planet "alignments" in February. A planetary alignment, or a "planet ...

February will be an awe-inspiring month for astronomy enthusiasts who will be able to the see the solar system's planets ...

Each planet in our solar system is given a unique, humorous catchphrase that reflects its personality and role. From ...

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

Mercury takes only 88 Earth days to orbit the sun.

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

15, 2025 — New observational data and simulation models have confirmed a new type of planet ... in the Solar System. This provides another piece of the puzzle to understand how planets and ...