Planets do not have planets of their own. If a large rock is orbiting a planet, it is called a moon.
Extrasolar planets are planets found orbiting stars other then our own.
Other stars, other than our own, have had multiple planets detected in an orbit around them. Its highly likely that there are other systems with eight planets. Planets the size of mercury or even slightly bigger planets the size of the Earth are extremely difficult to detect, so a star with four or five large known planets may actually have a lot more planets.
no planets crust does not have light of their own but the core of the earth has light of its own
The outer planets generate their own heat and the inner planets are warmed by the sun.
Extrasolar planets are planets found orbiting stars other then our own.
Sun has its own light while other planets do not have their own light
Yes, each of the 8 major planets has its own orbit, with no asteroids or other objects in its path.
Yes, hundreds of "extrasolar" planets, i.e., planets outside our own Solar System, have already been discovered.Yes, hundreds of "extrasolar" planets, i.e., planets outside our own Solar System, have already been discovered.Yes, hundreds of "extrasolar" planets, i.e., planets outside our own Solar System, have already been discovered.Yes, hundreds of "extrasolar" planets, i.e., planets outside our own Solar System, have already been discovered.
The planets' own gravity has made them spherical. Also there are other effects such as their ability to retain an atmosphere, etc. The Sun's gravitycauses the orbits of the planets.
no planets crust does not have light of their own but the core of the earth has light of its own
All the planets in our solar system orbit our sun. Recently other suns, far out in Space, have been discovered to have their own planets.
Yes, it does and it reflects light onto other planets making stars.
It would be impossible to detect them with current technology, but there is not doubt that there are. We have discovered over 900 planets just in a small corner of our own galaxy, and it is belived that there are hundreds of billions more. Other Galaxies are not fundamentally different from our own, so there is no reason they would contain planets.
There are no known planets in any galaxy other than our own. While it is doubtless that other galaxies, including the cigar galaxy, contain planets they are much too far away fur us to detect them.
no planets crust does not have light of their own but the core of the earth has light of its own