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UNIVERSE 2.0


 UNIVERSE

The universe is everything that exists, including all matter, energy, time and space. The universe is believed to have started with the Big Bang, a huge explosion that occurred about 13 billion years ago. GALAXY A galaxy is a collection of stars, dust and gas held together by gravity. There are billions of galaxies in the universe. The Milky Way is one of them. SOLAR SYSTEM The solar system consists of the sun and the planets orbiting around it. There are eight planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. PLANET A planet is a large, round object that orbits around a star. There are eight planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. STAR A star is a huge, bright object that is made of hot, glowing gases. Stars are held together by their own gravity and give off their own light and heat. ASTEROID An asteroid is a small, rocky object that orbits around the sun. COMET A comet is a small, icy object that orbits around the sun. It is made up of dust and ice. MOON A moon is a small, round object that orbits around a planet. The Earth has one moon. ATMOSPHERE The atmosphere is the air around a planet. It helps to keep the planet warm and protects it from the suns harmful rays. OCEAN An ocean is a large body of water that covers most of the Earths surface. CONTINENT A continent is a large, dry landmass. There are seven continents on Earth: Asia, Africa, North America, South America, Antarctica, Europe and Australia.

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