Q:

How many planets are there in the universe?

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Quick Answer

According to NASA, more than 1,700 planets have been confirmed outside of our own solar system. However, the number of planets in the universe could essentially be infinite because scientists have yet to find the so called "edge" of space.

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How many planets are there in the universe?
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Full Answer

Forbes reports that there may be billions of planets like Earth just in our own galaxy. There are at least 100 billion galaxies in the known universe, each one containing billions upon billions of stars. Each one of those stars could have multiple planets in orbit around them. This means that there are likely many trillions of planets in the universe.

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Related Questions

  • Q:

    How does the solar system work?

    A:

    Simply put, planets in the solar system revolve around the sun and the solar system is held together by its own gravitational field. The solar system consists of nine planets, the sun, each planet's moons, comets, asteroids and meteors.

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  • Q:

    Why do the planets lie in a relatively flat plane?

    A:

    The planets, with the exception of dwarf planet Pluto, lie in the same relatively flat plane because the solar system formed from a collapsing disk of spinning material 4.5 billion years ago. A cloud of material condensed into an accretion disk of matter that spun around the sun, and particles that did not coalesce into planetary bodies were blown away by strong solar winds.

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  • Q:

    What are the names of the nine planets in the solar system?

    A:

    The names of the nine planets in the solar system are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. However, astronomers have reclassified Pluto as a dwarf planet.

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  • Q:

    What are the characteristics of the outer planets?

    A:

    According to Universe Today, the four outer planets of the solar system are all gas giants. This means they lack a conventional surface, and are made up of dense gases around a possible rocky or metallic core. These planets are called Jovian planets to distinguish them from the four rocky terrestrial planets closer to the sun.

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