The Universe is everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, galaxies, dust clouds, light, and even time. ... The Universe contains billions of galaxies, each containing millions or even trillio...
Today, spacecraft are helping us to study the Solar System's bodies up close and some are already heading beyond it. Astronauts have travelled to the Moon on the Apollo spacecraft, and robotic craft have been sent to study all the Solar System's main planets, some asteroids and comets, and even the Sun.
Mariner 10
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Venus Express
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IKAROS
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Magellan
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