They're not. There's no real scientific consensus, but most scientists agree that given the immensity of the universe, it's almost arrogant to assume we are the only denizens inside of it.
If you're still interested, look up the Drake Equation on Wikipedia, or watch this video of Carl Sagan explaining it: [See related link]
Other planets other than earth is put in the solar system for humans to explore and do researches on them.
It is highly unlikely that any other planet in our solar system will. That does not preclude the possibility of life being elsewhere in the universe.
No, the planets after Pluto are still within our solar system. After Pluto, there is Eris, Haumea, Makemake, and several other dwarf planets and minor planets that are part of our solar system. Beyond these, there is the Kuiper Belt and the Oort Cloud which are also part of our solar system.
Planets outside our solar system are called exoplanets. Thousands of exoplanets have been discovered orbiting other stars in the Milky Way galaxy. They come in a variety of sizes and compositions, and many are quite different from the planets in our own solar system.
They could, but as of now, no astronauts have travelled to any other planets in the solar system.
There are eight planets and five dwarf planets in our solar system.
Other planets other than earth is put in the solar system for humans to explore and do researches on them.
It is very unlikely there are unknown planets in our system,, although beyond the kuiper belt, at the very far edge of our solar system some believe there may be another planet. It is referred to as "Planet X".
It is highly unlikely that any other planet in our solar system will. That does not preclude the possibility of life being elsewhere in the universe.
ALL OF THeM!! But seriously: We know of no planet except Earth with life on it in our solar system, and the conditions on other planets forbid advanced life. There are planets belonging to other suns, but they are very far away, and we have no information about life on them. It is extremely unlikely, but not impossible, that aliens from other solar systems have visited our solar system.
No, the planets after Pluto are still within our solar system. After Pluto, there is Eris, Haumea, Makemake, and several other dwarf planets and minor planets that are part of our solar system. Beyond these, there is the Kuiper Belt and the Oort Cloud which are also part of our solar system.
Planets outside our solar system are called exoplanets. Thousands of exoplanets have been discovered orbiting other stars in the Milky Way galaxy. They come in a variety of sizes and compositions, and many are quite different from the planets in our own solar system.
They could, but as of now, no astronauts have travelled to any other planets in the solar system.
The atom and the solar system are not equal. The solar system contains the sun and the other planets.
planets
No.
Yeah