But I doubt any of the conspiracy nuts have watched the superb documentary In The Shadow Of The Moon because if anyone has any suspicions, there should be more than enough in here to convince any doubter.

The day man walked on the moon for the first time, July 20 1969, remains one of those 'you remember where you were days', like the day JFK was shot or 9/11.

But for those of us too young to witness the historic event first hand, chances are all we have is some grainy footage and a memory of hearing Neil Armstrong's crackly phrase "This is one small step for [a] man, one giant leap for mankind" for the first time.

This film fills in the gaps, the missions that went before Apollo 11 and those that went after, and lets the brave men who risked their live tell their own story.

I say brave, because having watched some of the things these people put themselves through, my admiration has increased exponentially. Many risked their lives multiple times.

Being an astronaut tends to be one of those jobs that is romanticised - lots of little kids dream of going to space. But these men had no idea whether they were going to live or die.

So much so, President Nixon recorded a statement mourning the loss of Armstrong and Buzz Aldrin should they have walked on the moon but couldn’t make it back off. These are amazing people.

The film uses a lot of television footage from the time as well as mission footage, and intersperses new interviews with the surviving Apollo astronauts.

And it's not all serious either. Aldrin recollecting his pause on the steps of the lunar lander to fill up his urine bag and the rush to get a colour film in the camera to take what's become the iconic picture of earth from space provide a startling contrast to the seriousness of the tragedy of astronaut deaths in the Apollo 1 fire.

There's even some footage of Neil Armstrong's parents on television show 'I've Got A Secret' in which Armstrong's mother was asked what she'd say if her son became the first man to walk on the moon ('I wish him the best of all good luck,' was what Mrs Armstrong managed).

But despite the excellence of the film, it's not perfect.

The biggest issue is the lack of interview with the man who took the most famous first step in the world. Armstrong is a renowned recluse and wasn't interviewed for the film and therefore a huge part of the story is missed.

This is somewhat mitigated by plenty of screen time for the much-less reclusive Aldrin (who showed enough humour to explain why the producers of The Simpsons wrote him into the episode in which Homer goes to space) and the oft-forgotten third member of the first moon-landing team, Michael Collins. But I'd rather have heard from the man himself.

The second is, it just feels a little rushed. The two-disc package gives you plenty of deleted scenes, but some of them should have been in the initial cut. I don't think anyone would have complained about a two-hour plus cut of the documentary - there is plenty of ground to cover after all.

But the flaws are minimal given the overall presentation and moments like the sharing of drawings which one astronaut's children put in his mission folders, as well as hearing phrases like "The Eagle has landed" uttered means this documentary is a must for anyone with any interest in space and the moon.

In The Shadow Of The Moon is out now on DVD and is available from Madman Entertainment.