What is a Planet? - NASA Science

The Definition of a Planet What is a planet? According to the Merriam-Webster dictionary, the word planet goes back to the ancient Greek word planēt, and it means “wanderer.” The International Astronomical Union (IAU) – the group of astronomers that names objects in our solar system – planets originally were defined as objects that moved […]

Planets - NASA Science

How do planets form? – Exoplanet Exploration: Planets Beyond our Solar System

Could an asteroid be as big or bigger than Earth? - Quora

Could electricity exist in space or just on planets? - Quora

Studying the Outer Planets and Moons - NASA Science

NASA scientists propose to make Pluto a planet again

Why do some planets have rings? What determines their size and

Does the sun exist? - Quora

What is a Planet? - NASA Science

Mercury's magnetic field tells scientists how its interior is different from Earth's

Is Kepler-452b a real planet or just theory and speculations? - Quora

How can we consider that a space body (Earth) is a planet? - Quora

NASA Science