The Sun is the nearest star to the Earth. We could never live there because the temperature on its surface is about

5,500 C. How hot do you think it is in the center? An incredible 15 million C.

75% of the Earth is water. Life is possible on the Earth because it’ s not too hot or too cold. One more reason is the air which we can’ t live without.

The Moon is our closest neighbour. It gives light at night but it’ s not a star. Is it a planet then? No, it isn’ t. It’ s the Earth’ s satellite.

Mercury is a chemical element with the symbol Hg and atomic number 80.

A heavy, silvery d-block element, Mercury is the only metallic element that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature.

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.

It has no natural satellite. It is named after the Roman goddess of love and

beauty.

Mars is the fourth planet from the Sun in the Solar System and the second-smallest solid planet. Mars is rocky and cold, with polar ice caps of frozen water and carbon dioxide.

It has the largest volcano in the Solar System, and some very large impact craters. Mars is named after the mythological Roman god of war because it is a red planet, the colour of blood.

Jupiter is the largest planet in our solar system. It is colourful. In astrology it is considered to be the planet of fortune.

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, its astronomical symbol represents the god's sickle.

Uranus is the seventh planet from the Sun. It has the third-largest planetary contrast, the interior of Uranus is mainly composed of ices and rocks.

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. Named after the Roman god of the sea, its astronomical symbol, a stylised version of the god Neptune's trident.