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Basics of planets

What are planets?
A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, but not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
What are planets composed of?
Earth and the other three inner planets of our solar system (Mercury, Venus and Mars) are made of rock, containing common minerals like feldspars and metals like magnesium and aluminum. So is Pluto. The other planets are not solid. Jupiter, for instance, is made up mostly of trapped helium, hydrogen, and water.

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Types of planets

    On the basis of mass regime :-

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    On the basis of orbital regime :-

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    On the basis of composition :-

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    Other planets :-

Earth Analog A planet with environmental conditions similar to those found on Earth.
Classical Planets      The planets as known by the ancients-the Moon, the Sun, Mercury, Venus, Mars, Jupiter, Saturn.
Hypothetical Planet A planet or similar body whose existence is not proven, but is believed by some to exist.

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Our Solar System's Planets

Plotting Cat
Angry Cat
Curious Cat
Prowling Cat
Sleepy Cat
Sleepy Cat
Sleepy Cat

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