Why is Earth the only planet with a single moon?
Why is Earth the only planet that's blue?
Why is Earth the only planet with oceans of water?
Asteroid Ida, Pluto, and Eris each have one natural satellite.
Pluto has 3. Charon, Nix, Hydra
Eris has one, tis true. But it's not a naturally formed one.
Ida is not a planet. But you seemed to have known this.
Earth is blue because the wavelengths are absorbed less. Same cause as the blue shift effect. Uranus and Neptune are both blue.
Uranus is blue-green, not blue, due to the methane.
Also, Earth is blue because blue light is scattered more than the other wavelengths, not just because it's absorbed.
You still didn't answer why it's blue. Why is it that Earth has an atmosphere that scatters blue light? What makes it special compared to Venus and Mars?
Earth has water because it is not so hot the water will evaporate nor too cold that it will freeze. Water is produced by burning hydrogen with the following chemical formula:
2 H2 + O2 -> 2 H2O
It's not too far fetched to assume that when Earth was a big lava planet, that some of the MOST ABUNDANT ELEMENT combusted with the help of one of the other elements commonly produced in stars via fusion (which includes every element up to Iron if I remember correctly). We're in the sweet spot for our solar system. Other planets could have water somewhere, but that is less likely since their temperature is not right. And gas giants aren't fun at all for biological life.
I am aware of the chemical formula for water.
So why is Earth in the "sweet spot" when no other planet is? Clearly we must be special. We're in the sweet spot when, according to RET, the Earth could have formed anywhere if at all. And the area of sweetness is rather wide, given proper atmospheric conditions. So why isn't any other planet life giving or full of water oceans?
You simply can't compare the Earth to other planets because it's not like other planets in our solar system. The only common thread between all the planets in our solar system is that they are made of matter.
You also have ignored the fact that other stars have planets, which doesn't surprise me considering how you think the stars are all fixed objects that are 3100 miles away. I won't even bother mentioning multiple star systems (example: Centauri system, containing Alpha, Beta, and Proxima Centauri as its three stars) or the possibility that stars are in fact not fixed objects 3100 miles away, since you'll just ignore it and restate your own unfounded beliefs.
Why would you mention them?
You haven't been there.
No probes have been there.
Telescopes can only see light "wobbles".
Frankly, the fact that you THINK planets around other stars is proof that the Earth isn't special is... well, a rather large assumption considering that even if you can prove they exist, you can't see their composition directly. Not without sending probes or going there in person.
Of course, since Space Travel is not possible, it's all irrelevant.
Our Moon is currently thought to be a captured asteroid due to its relative size. I assume that this is what you mean by 'not naturally formed'.
I said that blue light was absorbed LESS. As in, red light is absorbed more by the water.
Now, as for our planet being in the sweet spot, you have to consider a variety of factors:
Temperature (which we are in a good spot for)
Ability to hold an atmosphere. Planets like Mars don't quite have enough gravity so it's atmosphere diffuses into space, while gas giants have way too much atmosphere.
Presence of compounds essential to life. This is arguable since other life forms from other life-sustaining planets might not use water, oxygen, and carbon dioxide. But I'm going to assume you mean ability to sustain human life - we have those compounds in abundance.
Magnetic field - helps your life forms to not get irradiated so much by the sun. Earth is lucky enough to have a molten core that provides this.
Now, if you put Venus where Earth is, you might get a good temperature for life, but it still has highly reactive compounds on it which would likely destroy self-replicating molecules before they get the chance to be multicellular life forms. If you put Mars where Earth is, you might have water, but you still wouldn't have much of an atmosphere.
As for knowing the composition of life-sustaining planets, it's impractical to send a probe to every planet, especially with current tech. We have to do with what tech we have. Which means looking for planets in the sweet spot using our telescopes. We aren't looking at their composition, although I think we could probably get some sort of idea of what their atmosphere is with a spectroscopy of the light wavelengths. We are mainly looking at their position since any planets not in the Goldilocks zone can be quickly ruled out. We could send probes in the future, but not when our space program is being defunded and privatized. People don't see the value in our space program anymore, so they only want it to do things they can make money off of. Of course, you're probably beaming about this because of this big, evil conspiracy you have no proof of. I mean, I like to play Deus Ex occasionally too, but there is a fine line between rational and irrational conclusions. This is one of the latter, because of the overwhelming evidence in favor of the space program being real. If you want me to, I'll list that evidence for you.
Also, saying space travel is simply impossible is a big assumption. Have you tried to travel in space? Where's that Zetetic Method? Correct me if I'm wrong, but I don't think that Zeteticism means that everything you haven't witnessed is a lie. It means that in order to know something, you have to test it, which doesn't really mesh with all the assumptions in FET. If you can get enough money to get a private space corporation to take you up into space, you wear your space suit correctly, you see that the Earth is flat (with photographic evidence), and you end up simply crashing down (or the earth "crashing up" into you due to your magical moving everything that isn't a planet, star, or natural satellite) then I'll believe in your theory. Meanwhile, other people have gone into space, have taken pictures, and didn't have the earth crash into them due to a magical force which they are somehow exempt from. You just believe it is a conspiracy.
Earth is not 'special' in any sense other than it being very lucky. You can try to romanticize it if you want to, but at some point you'll have to accept reality.