The word planet comes from the Greek πλανήται (planḗtai) 'wanderers'. In antiquity, this word referred to the Sun, Moon, and five points of light visible to the naked eye that moved across the background of …

Feb 3, 2026 · Is There Another Planet in the Solar System? It's an intriguing idea that might explain some current mysteries, but direct evidence of another planet has yet to be found.

Feb 5, 2026 · Planet, broadly, any relatively large natural body that revolves in an orbit around the Sun or around some other star and that is not radiating energy from internal nuclear fusion reactions. …

The smallest and fastest planet, Mercury is the closest planet to the Sun and whips around it every 88 Earth days. Spinning in the opposite direction to most planets, Venus is the hottest planet, and one …

May 21, 2024 · Discovered in 1930, it was long considered the ninth planet in our solar system. But in 2006, the International Astronomical Union revised its definition of a planet. Under the new definition, …

There are eight planets. In order of distance from the Sun, they are: Mercury, Venus, Mars, Jupiter and Saturn are visible with the naked eye, and have been known throughout human history.

There are eight planets in the solar system – Pluto was the ninth until being changed to the status of a “dwarf planet”. Planets are masses of rock, liquid, or gas held together by gravity and orbiting the sun …

The English word planet comes from the Greek planēs. Unlike the ancient Greeks, we now know that the planets "wander" across the sky because they are revolving around the sun.

Jan 30, 2026 · This process would have continued through the formation of several concentric rings, each of which then would have coalesced to form a planet. Similarly, a planet’s moons would have …

Feb 3, 2026 · What is a Planet? The word goes back to the ancient Greek word planēt, and it means "wanderer." A more modern definition can be found in the Merriam-Webster dictionary which defines …