Because every probe ever sent to the surface of Venus melted after a few minutes and got crushed into a small ball by the pressure and heat there. Besides this, there is no point in searching for water there; any that was would have vapourised immediately and disappeared from the atmosphere.
Scientists think this probably happened and that the "planet" was about the size of Mars. However, it was several billions of years ago and the object that hit Earth is not usually given a name.
Venus
no, it covers billions of them.
You're asking us? Scientists can't even figure this out. Evidently from old "stardust" - i.e. when a star explodes, its detritus travels to other systems and eventually comes into orbit around another solar body, eventually forming into a planet. It takes billions, upon billions, upon billions of years.
Quite possibly. So far, scientists have discovered over 1,000 planets outside our solar system, and estimate that there are hundreds of billions more in our galaxy.
pluto
the only planet that scientists do not consider a planet is Pluto, (but they also found new planets in the asteroid belt.)Pluto
Since we haven't actually discovered any aliens yet, we do not know. However scientists do believe that due to there being billions of galaxies out there, there must be another planet like earth with life on it.
Venus was the planet that the spacecraft Magellan enabled scientists to research extensively.
If scientists discover another planet we can live on then yes but right now scientists are still looking;)
Scientists believe that the water on earth came from icy comets that collided with the planet. This would have mainly happened billions of years ago when the earth was still quite young, and when bombardment from such bodies was more frequent.
No scientists say that. Scientists know that Pluto is a dwarf planet, and not one of the 8 major planets of our solar system.