Mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. #Jupiter is classified as a gas giant along with Saturn, Uranus and Neptune. Together, these four planets are sometimes referred to as the Jovian or outer planets.

Mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. #Jupiter is classified as a gas giant along with Saturn, Uranus and Neptune. Together, these four planets are sometimes referred to as the Jovian or outer planets.

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Dark, cold & whipped by supersonic winds, Neptune is a hydrogen & helium gas giant in our solar system. Over 30 times as far from the sun as Earth, it takes almost 165 Earth years to orbit our sun. In 2011, Neptune completed its first orbit since its discovery in 1846. On Neptune, one "day" (time it takes to rotate once on its axis) takes 16 hours. It makes a complete orbit @ the sun in 165 Earth years. It has 13 moons & 6 rings. Photo: the "sideways" planet with vertically orbiting rings <3

Dark, cold & whipped by supersonic winds, Neptune is a hydrogen & helium gas giant in our solar system. Over 30 times as far from the sun as Earth, it takes almost 165 Earth years to orbit our sun. In 2011, Neptune completed its first orbit since its discovery in 1846. On Neptune, one "day" (time it takes to rotate once on its axis) takes 16 hours. It makes a complete orbit @ the sun in 165 Earth years. It has 13 moons & 6 rings. Photo: the "sideways" planet with vertically orbiting rings <3

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Like the sun, Jupiter is composed predominantly of hydrogen & helium. But unlike the sun, it lacks the necessary amount to begin fusion, the process that fuels a star. Jupiter would need to be 75-80 times more massive than it is at present to be considered a star. If all of the planets in the solar system had formed as part of the gas giant, it still would not have sufficient mass. Still, by itself, Jupiter is 2 & 1/2 times larger than all of the other planets in the solar system combined.

Like the sun, Jupiter is composed predominantly of hydrogen & helium. But unlike the sun, it lacks the necessary amount to begin fusion, the process that fuels a star. Jupiter would need to be 75-80 times more massive than it is at present to be considered a star. If all of the planets in the solar system had formed as part of the gas giant, it still would not have sufficient mass. Still, by itself, Jupiter is 2 & 1/2 times larger than all of the other planets in the solar system combined.

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Saturn, the sixth planet from the Sun, was named after the Roman God Saturn. The planet Saturn is a gas giant and one of the Jovian planets.

Saturn, the sixth planet from the Sun, was named after the Roman God Saturn. The planet Saturn is a gas giant and one of the Jovian planets.

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A Hitchhiker's Guide to Space & Plasma Physics - Planets of Our Solar System Our solar system...

A Hitchhiker's Guide to Space & Plasma Physics - Planets of Our Solar System Our solar system...

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NASA’s Astronomy Picture Of The Day: Hubble’s Jupiter And The Amazing Shrinking Great Red Spot

NASA’s Astronomy Picture Of The Day: Hubble’s Jupiter And The Amazing Shrinking Great Red Spot

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The planet Uranus, seventh planet from the sun, is a giant ball of gas and liquid and was the first planet discovered with a telescope.

The planet Uranus, seventh planet from the sun, is a giant ball of gas and liquid and was the first planet discovered with a telescope.

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The planet Neptune is the eighth planet from the Sun and has a thick atmosphere and the fastest winds in the solar system.

The planet Neptune is the eighth planet from the Sun and has a thick atmosphere and the fastest winds in the solar system.

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GJ 504 b: Pretty in Pink  For those of you who love the color pink, you might enjoy a recent discovery in the world of astronomy. NASA scientists have discovered a gas giant planet around four times the size of Jupiter, 57 light years away from Earth. The large exoplanet, which orbits the Sun-like star; 59 Virginis (GJ 504), is making scientists question prior theories about planetary formation. Also, did we mention it is pink?  Read more about this fascinating planet her

GJ 504 b: Pretty in Pink For those of you who love the color pink, you might enjoy a recent discovery in the world of astronomy. NASA scientists have discovered a gas giant planet around four times the size of Jupiter, 57 light years away from Earth. The large exoplanet, which orbits the Sun-like star; 59 Virginis (GJ 504), is making scientists question prior theories about planetary formation. Also, did we mention it is pink? Read more about this fascinating planet her

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This object, called the Helix nebula, lies 650 light-years away in the constellation of Aquarius. Also known by the catalog number NGC 7293, it is a typical example of a class of objects...

This object, called the Helix nebula, lies 650 light-years away in the constellation of Aquarius. Also known by the catalog number NGC 7293, it is a typical example of a class of objects...

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