Redfern, Martin. The Kingfisher Young People's Book of Space. New York: Kingfisher, 1998. Print


Mars is the fourth planet from the Sun and the second smallest planet in the Solar System

solar system

The Solar System comprises the Sun and its planetary system of eight planets, as well as a number of dwarf planets, satellites


Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has no moon. The planet is named after the Roman goddess of love and beauty



In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbite

Jupiter is the fifth planet from the Sun and the largest planet in the Solar System. It is a gas giant with mass one-thousandth of that of the Sun but is two and a half times the mass of all the other planets in the Solar System combined.

Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Named after the Roman god of agriculture, Saturn, its astronomical symbol represents the god's sickle.

The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields

Neptune is the eighth and farthest planet from the Sun in the Solar System. It is the fourth-largest planet by diameter and the third-largest by mass. Among the gaseous planets in the solar system, Neptune is the most dense.

Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days.

Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System.

Pluto, minor-planet designation 134340 Pluto, is the largest object in the Kuiper belt, and the tenth-most-massive body observed directly orbiting the Sun. It is the second-most-massive known dwarf planet, after Eris.

the Moon is the only natural satellite of the Earth and the fifth largest moon in the Solar System. It is the largest natural satellite of a planet in the Solar System relative to the size of its primary

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