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...
Planets found outside the Solar System are called extrasolar planets or exoplanets. For many centuries, astronomers had suspected that planets orbited alien stars. The first exoplanet orbiting a sunlike star was found 1995. Astronomers have now found hundreds of exoplanets and are discovering more all the time.
Kepler 11's planets
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Kepler 20e and 20f
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HD 10180's planets
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