The gravity of the Sun pulls on the planets and keeps them revolving in their orbits. The planets are moving at relatively high velocities (between 5 and 48 kilometers per second) and thereby resist this gravitational pull, and there is comparatively little friction in space to slow them down.
(*the Earth is moving at about 30 km/sec in its orbit, which is 67,000 mph!)
The Moon is Earth's natural satellite, orbiting around our planet, while a planet is a celestial body that orbits a star. Moons do not emit their own light but rather reflect the light of the star they orbit, while planets do not orbit other astronomical bodies but instead orbit stars. Additionally, planets are larger than moons and can be composed of a variety of materials.
Io and Titan are moons because they orbit planets (Jupiter and Saturn respectively).
Yes, comets orbit the sun, but usually in an eliptical (oval) or eccentric orbit rather than a more-or-less circular one like the planets.
I'm not sure what you mean by "Star planets." However, I can tell you that there are 8 known planets that orbit the star Sol, including Earth (Sol 3).
None. Moons orbit Neptune. Planets orbit the Sun
The gravitational force produced by the sun keeps the planets in orbit around it. This force pulls the planets toward the sun, creating a continuous circular motion rather than a straight line out into space.
The Moon is Earth's natural satellite, orbiting around our planet, while a planet is a celestial body that orbits a star. Moons do not emit their own light but rather reflect the light of the star they orbit, while planets do not orbit other astronomical bodies but instead orbit stars. Additionally, planets are larger than moons and can be composed of a variety of materials.
Io and Titan are moons because they orbit planets (Jupiter and Saturn respectively).
Yes, comets orbit the sun, but usually in an eliptical (oval) or eccentric orbit rather than a more-or-less circular one like the planets.
I'm not sure what you mean by "Star planets." However, I can tell you that there are 8 known planets that orbit the star Sol, including Earth (Sol 3).
To qualify as a planet, a body has to be approximately round, it has to orbit the sun and it has to have cleared its orbit of all other objects - so that at that distance from the sun, there are no other sizable bodies. Some dwarf planets, like Pluto, fulfill the first two requirements, but not the last one, this is why they are deemed dwarf planets rather than planets.
None. Moons orbit Neptune. Planets orbit the Sun
Inner planets have a radius orbit shorter than the orbit of Jupiter. Outer planets are all the other planets of the solar system.
Pluto's orbit is longer and slower than other planets.
When a planet moves around a star, it causes the star to wobble a bit from side to side as planets follow an elliptical orbit rather than a circular orbit. Astronomers can then use this fact to see whether stars have planets.
You cannot have planets orbiting planets. Planets orbit suns. Only satellites orbit planets. In the case of planet Earth, the moon is the only natural satellite.
Planets orbit the sun in the shape of an ellipse, which is an elongated circle similar to an oval. When it was first discovered that the Sun is the center of the solar system, it was thought that all the planets had a circular orbit, but the calculations didn't fit.