Yes. There are at least 12,600 trillion intelligent civilizations (i.e. sentient species) in the observable universe (126,000 per galaxy). They come in all shapes, sizes, colors, unusual features, etc. There is also at least 100 billion in-universe reference books of them (excluding non-sentient ones), because in addition to their large portraits, they get a 1 1/2 page detailed description of their species, their histories and what planet and/or moon they're from, which is at least 189,000 pages in length per book. But for now, it is unknown.
In my opinion, yes. There are at least 12.6 million billion or more intelligent alien civilizations in the observable universe.
If you counted 1 intelligent alien civilization per second, it would take 400 million years to count all 12,600 trillion intelligent alien civilizations in the universe.
at least 12,600 trillion or more. For now, it is unknown.
There is absolutely know way of knowing. So far we only intelligent civilization that we know of is our own. We have no idea of how common life is in the universe, let alone intelligent life. The number is probably too high for the observable universe. If there are 12.6 quadrillion civilizations in the observable universe of 100 billion galaxies, that gives us an average of 126,000 civilizations for an average galaxy. Since our galaxy has more stars than most that would suggest that there are several hundred thousand civilizations in the Milky Way, perhaps over a million. Suggesting so many civilizations exist in our galaxy would invoke the question of Fermi's paradox: where is everybody?
Yes. There are at least 90 billion trillion or more planets in the observable universe.
In my opinion, yes. There are at least 10,000 trillion sentient species (100,000 per galaxy) in the observable universe.
In my opinion, yes. There are at least 10 billion trillion Earth-like planets in the observable universe.
Yes, the current Dwarf galaxies in the visible universe are 7 trillion.
The observable universe is estimated to contain 200 billion to 2 trillion galaxies
Unlikely, because that number is only someone's estimate.
1,000,000,000,000,000,000,000 = 1021 = 1 sextillion
There are over 10,000 trillion alien races/civilizations (100,000+ per galaxy; excluding humans) in the Outlaw Star Universe.