A satellite. It can be natural, like the moon, or artificial, like the International Space Station.
The apparent backward motion of a superior planet as Earth passes it is called "retrograde motion." This phenomenon occurs due to the relative positions and movements of Earth and the other planet in their orbits around the Sun. As Earth moves faster in its orbit, it creates the illusion that the superior planet is moving backward against the background stars.
Density of a planet = (Planet's mass) divided by (Planet's volume)
Could you provide more context or specify which planet you are referring to?
sedna
Nicknames for Neptune include "The Ice Giant" and "The Blue Planet." These nicknames are given to the planet because Neptune is the farthest ice giant planet in our solar system and its blue color is due to the presence of methane in its atmosphere.
An orbit.
A year on any given planet is the time for that planet to revolve around the sun one time.
electrons.
An orbit.
A planet. The fact that a planet spins around the sun is a given condition when you say that it is a planet. A similar example of question would be, "When a man combs his hair, what gender is he?" His being male is already apparent.
The apparent backward motion of a superior planet as Earth passes it is called "retrograde motion." This phenomenon occurs due to the relative positions and movements of Earth and the other planet in their orbits around the Sun. As Earth moves faster in its orbit, it creates the illusion that the superior planet is moving backward against the background stars.
In Greek mythology, Mercury was the messanger of the Gods, moving rapidly from place to place performing his functions. The planet Mercury has been known to people from ancient times and appears to be the most rapidly moving of the planets. Since the planets were named for the gods, the connection with a rapidly moving god caused the planet to be named Mercury.
The time it takes for any given planet to make one complete revolution around its sun determines the length of its year.
That's a rather difficult question; "Planet X" is a temporary title that may refer to any planet that may or may not exist, or does not have a permanent designation. Therefore, as "Planet X" may be any newly found planet that has yet to be confirmed, it may have nearly anything on it. For a while, Pluto was referred to as "Planet X," but was then verified and given a permanent name.Believers of the Nibiru Cataclysm Theory sometimes claim that "Planet X" is the name NASA has given to "Nibiru," a mythical planet-like object, as part of a conspiracy/cover up. There is no scientific foundation for this "theory."
Some people think Eclipse but i don't think its true to be truthful!
Their joints are restricted, so around 5 or 6, given they walk sideways
The momentum of the planet is balanced by the gravitational pull of the sun to keep the planet in its orbit. To put it very simplistically, the planet is moving so fast in the direction tangent to the sun's surface that by the time it falls any given distance toward the sun it has also moved around the sun so far that the net effect is that it stays at roughly the same distance from the sun but is over a different place on the sun's surface.