SETI
no
No. To date there is no proven direct evidence of extraterrestrial life.
Unfortunately, no extraterrestrial life has been discovered to date, but astronomers are always on a close lookout!
All planets other than Earth could be considered alien. Earth is the only planet known to harbor life.
life and void
Acronym for "alien life form"
The existence of extraterrestrial life, including whether aliens have cells, remains purely speculative as no definitive evidence of alien life has been discovered. If alien life exists, it could potentially have a cellular structure, but it might also be fundamentally different from life on Earth. The nature of alien biology could vary widely, possibly leading to entirely different forms of organization and function. Ultimately, until we find actual extraterrestrial organisms, we cannot conclude anything about their cellular structure.
Probably. As nobody has discovered an alien life form (yet), we can't be certain that they would even have hands. However, the possibilities are so vast that there probably would be a few with eight fingers on each hand.
Alien life on other planets has not yet been discovered. Furthermore, the distance of Venus from the sun makes it an unlikely candidate for alien life, since it is far too hot to support life as we know it. Therefore, it is not possible to meet an alien at this time.
Then you have found signs of extraterrestrial life and should tell scientists immediately.
The cast of Alien Life - 2014 includes: Michael Ironside as Narrator
No-one can be sure of that yet. NASA need more research and evidence. If alien life is discovered on mars it will almost certainly be of a primitive microscopic sort, like bacteria.