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Does each planet has its own Galaxy?

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For many years scientists have studied our own solar system. But until the last few years, we knew of no other solar systems. This may seem surprising, as the Sun is one of about 200 billion stars (or perhaps more) just in the Milky Way galaxy alone. read more

Astronomers have detected eight new exoplanet candidates circling nearby red dwarf stars, which make up at least 75 percent of the galaxy's 100 billion or so stars. Three of these worlds are just slightly bigger than Earth and orbit in the"habitable zone," the range of distances from a parent star where liquid water could exist on a planet's surface. read more

Every solar system has at least one sun. The terms sun and star are synonymous. We tend to use the term sun in the context of a planet. A planet has a sun which is itself a star. A solar system is a star with at least one planet orbiting around it. Many stars have one of more companion stars. Hence many solar systems will have two or more suns. read more

Our sun has the standard eight planets along with their moons, and also countless other objects including asteroids and comets. Our galaxy, The Milky Way, is estimated to contain between 200 billion and 400 billion stars. read more

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