Science
Related: About this forumHow many planets are known NOT to have living forms
Living forms identified as life forms either animal or human type.
lumberjack_jeff
(33,224 posts)Longer answer: if life requires meaningful levels of free gaseous oxygen, and liquid water then all of them except one.
Posteritatis
(18,807 posts)LiberalFighter
(50,499 posts)Then why aren't we in communication with them?
Posteritatis
(18,807 posts)jberryhill
(62,444 posts)And yet, there they are.
HopeHoops
(47,675 posts)intaglio
(8,170 posts)Absolutely not? 1, the Moon
Almost certainly not? Mercury, Pluto, Asteroids and Kuiper belt objects.
Highly unlikely? Venus, the gas giants and most of the moons of the gas giants, but we do not know enough about the chemistries that might become life to declare for certain.
Possible but unlikely? Europa and Mars.
Non-Solar worlds so far detected? Not enough evidence or knowledge to even make a guess.
bananas
(27,509 posts)DetlefK
(16,423 posts)Warpy
(110,907 posts)We see planets we suspect are too hostile to support even microbes in deep caves. However, we have not been able to confirm that.
discntnt_irny_srcsm
(18,470 posts)...we only know of life here on earth. I read that, as of this past June, we "know of" 786 planets. So 786 - 1 = 785.
trishnikolic
(20 posts)I don't know if there is very many planets just like earth, but I think in this universe where there are more stars than the earth has grains of sand, it is very hard to think all that is just meant for humans ! Yes there is life in all sorts of forms.