Can't believe nobody's mentioned his book, ['Carrying the Fire'] (https://www.amazon.co.uk/Carrying-Fire-Astronauts-Michael-Collins/dp/0374531943). Probably the best first hand account of the Apollo space programme there is.

If you like that, you should read the book

It would be great to hear from him today, but he did write a fantastic autobiography that answers most of your questions already:

https://www.amazon.com/Carrying-Fire-Astronauts-Michael-Collins/dp/0374531943/

Think again. Michael Collins was not the only astronaut to be out of contact with Earth. There were six successful Apollo missions: 11, 12 and 14-17. Each Apollo mission had a Command Module pilot who was in the position of being isolated from human contact while on the far side of the Moon, not just Collins. Wikipedia lists the Apollo crews here including the Command Module pilots, four of whom, including Collins, are still alive.

This site has a quote from Collins on loneliness, and another on his concerns that he may have had to leave his fellow crewmen behind if their Lunar Module failed to lift off.

A good start would be Michael Collins autobiography Carrying the Fire

Eh, I am not sure about niche subreddits for the history and random facts but there is information and news at /r/spaceflight as well as /r/space.

If you really want to learn about space stuff, here are some other forms of media.

Podcasts:
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Liftoff from RelayFM - Two guys, non-experts, talking about space, including spaceflight, astronomy and all kinds of other things. They occasionally have guests on about all kinds of stuff and they just released an episode today that was the second of a series (not the main focus but a good bit of the episodes) talking about the history of NASA pre-shuttle so they talk about the history of US astronauts starting at Mercury.

Space Rocket History - Okay, where that one is a fun, quick overview of space, spaceflight etc. This is the opposite. If you want information, this is the podcast.
How in-depth does it go? 220+ episodes and Basically you can look up any major event from the beginning of the space/rocket age up until Apollo 11 (because that is where he currently is) and you will find something. Sputnik 1 and 2. Explorer 1. Vostok 1 with Yuri Gagarin, Vostok 5/6 with Valentina Tereshkova(first woman in space) the list goes on and on. Currently he is on Apollo 11- Lunar Landing part 2. This is the 20th part of JUST APOLLO 11. He has multiple episodes about Niel, Buzz and Michael Collins, 3 parts about Apollo 11 training, 1 just about the time traveling from the earth to the Moon, one about being in lunar orbit. Nobody is left out. There is even a 3 part episode series about Sergei Korolev, the Soviet rocket scientist. I am going on and on but I am just trying to show you how in-depth this stuff goes.
It's a bit dry as there is not a pair of hosts, it is only one guy speaking. He is a bit older but he is incredibly knowledgeable. If you are okay with audiobooks, you will be cool with this. I use it as background sound and enjoyment when I am just relaxing.

There are other space podcasts (Planetary Radio, Countdown) but those are two really good ones.

Series

From the Earth to the Moon. This is the best series I can recommend about space flight. It is a series all about the Apollo program, from the beginning to the end. It is phenomenal and if you are curious to know about those missions and what went on behind the scenes, it is an absolute must watch. (You have to search a bit to find them because while they were made by HBO, they are not on HBO Go so....

Spaceflight - Is a 4-part documentary by PBS about the 4 programs by the US, Mercury, Gemini, Apollo and the Space Shuttle. They are good and all available on YouTube

Books

Failure is not an Option is an autobiography written by Gene Kranz, Flight Director for the Apollo 11 and 13 mission as well as Director of NASA missions.

Carrying the Fire is another autobiography written by Michael Collins, the command module pilot for Apollo 11 as well as a Gemini Astronaut and USAF test pilot.

The Right Stuff about the Mercury 7 (astronauts) I believe it is also a movie but I have never watched it.


Last Man on the Moon is a memior/autobiography by Eugene Cernan, the last human being to have walked on the Moon. All about his life in the Navy as well as a NASA astronaut.

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I hope you enjoy whatever type of media you prefer. :)

I've found quite a few interesting references in these comments. Here they are all in one place for you:

Books

Carrying the Fire: An Astronaut's Journeys. Michael Collins' autobiography. (from this comment)

Flying to the Moon: An Astronaut's Story. Children's version of his autobiography, apparently very inspirational. (from this comment)

Rocket Men: The Epic Story of the First Men on the Moon. About the Apollo 11 mission. Great mix of information and anecdote.

The Right Stuff. The classic book, not the movie. About the test pilots who broke the sound barrier and went on into space. (from this comment)

Documentaries

In the Shadow of the Moon. (that's a link to the comment, which I think is an interesting review. Here's a link to the documentary in IMDB, in case the comment ever gets deleted). (from this comment)


Music

Jethro Tull: For Michael Collins, Jeffrey And Me. And here are the lyrics, many of which I missed when listening to the song. (from this comment)

Miscellaneous

Question and answer session with Michael Collins, about Apollo 11 (from this comment)

Official NASA photo of the crew of Apollo 11 (from this comment)

"Mike Collins", usage as a verb (from this comment)

Poetry - The Ride Not Taken. With apologies to Robert Frost. (from this comment)

Brasseye - Apollo, The Truth!, for those who can't take these things too seriously (don't watch if you have a serious man crush on either Collins or Aldrin). (from this comment)

EDIT: Added links to the comments where I found these references.

Very cool. Astronaut Mike Collins mentions this a bit in his book Carrying The Fire

One of a kind. Hell of a book if you haven't.

Carrying the Fire

**Forward by Charles Lindbergh - I fell in love with "Spirit of St. Louis" and watched it 10 times before I found out Lindbergh was a slimeball.

I highly recommend this book of you enjoy Apollo/space history

https://www.amazon.com/Carrying-Fire-Astronauts-Michael-Collins/dp/0374531943

One of the best books I've read in the last decade

>Astronauts said at the press conference they did not see stars, yet years later one of them remembers seeing stars and wrote about it in a book.

https://www.youtube.com/watch?v=SG7HjyuDP9w

https://www.youtube.com/watch?v=xyjppxh2-C0

Ignore the bullshit the narrator is feeding you in the first clip. As I've demonstrated in another comment in this discussion, it's wrong.

Listen to the actual question, and the actual answers given and who gives them.

The question being asked is whether the astronauts were able to see stars from the lunar module, while they were taking some scientific photographs of the sun's corona, before they'd landed on the moon. The phrase "despite the glare" would indicate that there would be a good reason not to be able to see stars during this exercise, as... well, there's a glare.

The fact that Collins answered the question should tell you they're not talking about stars being visible from the surface of the moon, as Collins didn't land on the surface.

Another astronaut talking about seeing stars from the moon's surface has no bearing on whether Armstrong and Collins could see stars while filming the sun's corona from the lunar module.

(Note also that the first video you linked cut out Collins's response and the narrator lied about the nature of the question.)

>And take a look at their behaviour. Thats how people look like when they have achieved something to be very, very proud of?

I'm not sure that how one may or may not feel about their behavior is relevant evidence of anything other than how one feels about something.

>And this scene https://youtu.be/wdMvQTNLaUE?t=2m7s

Yeah, it looks weird, but remember, 1/6 gravity, and a deceptive center of mass due to the heavy backpack.

The rest of your post is pseudoscience and I'm not sure it belongs in this sort of discussion.

EDIT - if anyone was actually paying any attention to this, they'd have noted that my response here is not entirely correct, as Armstrong clearly states that he couldn't see stars from the surface of the moon during the daylight or without optical assistance. Jesus Christ, I literally said to pay attention to what was actually being said.

This was a softball, easy for anyone to catch and call me out on (and one I had a response for, as the book he's referring to is written by Collins, who never walked on the moon and was describing an experience during a spacewalk, so there is no contradiction as the poster suggests). I can only conclude from this that either nobody here is actually paying attention and/or taking this seriously at all and it has been a complete waste of my time, and I'm rather disappointed.