Definition of planet. 1a(1) : any of the large bodies that revolve around the sun in the solar system. (2) : a similar body associated with another star.What is space and where is space?
Space is the zone above and around our planet where there is no air to breathe or to scatter light. Space is a vacuum, but it is far from empty.What is the difference between a particle and a planet?
Particle: A tiny amount or small piece of something. Planet: A large body in outer space that circles around the sun or another star. Pulsar: An object, thought to be a rapidly rotating neutron star. It releases short pulses of radio waves and other electromagnetic radiation.What is the difference between a star and a planet?
Star explosions can also give rise to incredibly dense objects called neutron stars. If these neutron stars send out pulses of radiation, they are called pulsar stars. Planets are objects whose definition came under scrutiny in 2006, when astronomers were debating whether Pluto could be considered a planet or not.