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Binary system
A galaxy is far larger. A planetary system involves one or more planets revolving around a single star. A Galaxy consists of billions of stars.
Yes, the planet is called Bellerophon. See link for more details.
Dwarf stars. See related link for more information.
There are a great number of "binary" stars, but you generally need a good telescope to see that there is more than one star. One naked-eye set is the second star from the end of the Big Dipper's handle; it has a dim companion that can be seen only on clear, dark nights. Telescopes show this system has six stars, but four are much too dim for eyes or even binoculars. Also, stars do not 'rotate' around each other; they 'revolve' around each other. Rotating is spinning in place, and revolving is circling around repeatedly.
Two stars that are close together will orbit each other. More precisely, they will orbit around their common center of mass. The two stars are called a binary star in this case.
Absolutely. We are finding more and more planets [Exoplanets] around other stars everyday.
The sidereal revolution time of the Moon is 27.32 days. This is the length of time it revolves relative to distant stars. Of more use, however, is the synodic period, which is 29.53 days, the average length of time it takes to repeat a phase. The reason for the difference between these two times is that the Moon is revolving around the Earth, at the same time the Earth is rotating about its axis, at the same time that the Earth is revolving around the Sun.
The one doing the revolving is the "orbiting object". It doesn't usually get more specific than that, unless one is referring to a moon or man-made object in orbit around a planet. Those are called satellites. Other orbiting objects include the planets of a solar system around their sun, and the electrons of an atom around its nucleus.
that's because some stars are closer to the earth; another reason is that some stars get more sunlight than others; another reason IS that the star might not have that much enregy
NO. Do you need more to know??
copper wires, please be more specific on the layout or design for a better answer