SOLAR SYSTEM

Detailed explanation-1: -All three of those stages have been carried out for the Moon, Venus, Mars, Jupiter, Saturn, a comet, and several asteroids. Several Soviet and U.S. robotic spacecraft have landed on Venus and the Moon, and the United States has landed spacecraft on the surface of Mars.

Detailed explanation-2: -There have been journeys to the inner planets: the Messenger, Magellan and Mariner spacecraft to Mercury and Venus. There have, too, been expeditions to Jupiter and Saturn and their colorful flocks of moons. Asteroids and comets and the sun itself have also been studied up close. Many of the missions are ongoing.

Detailed explanation-3: -The Moon is a planetary-mass object with a differentiated rocky body, making it a satellite planet under the geophysical definitions of the term and larger than all known dwarf planets of the Solar System. It lacks any significant atmosphere, hydrosphere, or magnetic field.

Detailed explanation-4: -Celestial bodies or heavenly bodies refer to the planets, stars, moons and all the other natural objects present in space.

Detailed explanation-5: -The sun, eight planets, satellites, stars and some other celestial bodies known as asteroids and meteoroids form the solar system.

Detailed explanation-6: -Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids.