When it comes to the general public's ignorance of space exploration, there are two drastic poles.
Swing to the opposite end of the spectrum and you have people like Lauren Hart, who think The Martian - a sci-fi story about a man left behind on a mission to Mars - is based on real events...
Asking if the Martian was a true story, not one of my finer moments— Lauren Hart (@Laurenreneehart) October 2, 2015
We commend Lauren for her honesty: she could have shied away from her moment of ignorance, putting the nasty business behind her. Instead, she sought out internet lols.
But it seems Lauren isn't alone. In fact, she belongs to a worryingly large section of society* (*that tweet) who apparently don't know if humanity has set foot on Mars.
At 2:46am - "what do you mean no one has been to Mars? You mean, The Martian isn't based on a true story?" -@lucyliz— Kae (@kaeepet) October 3, 2015
so my friend and i were talking about the Martian and she was like "it's based on a true story right?" and i was like ...yeah,, what the fu— simona ϟ inactive? ? (@1945bucky) October 3, 2015
As great as "The Martian" was, my favorite part was after when my grandma asks if it was based on a true story— Richie Abruscato (@get___RICH) October 3, 2015
Genuinely bothered that my mom thought The Martian was a true story.— Hayden Picker (@HaydenPicker) October 5, 2015
Overheard two people talking at Panera about how THE MARTIAN was “based on a true story.”— Mαtt Thomαs (@mattthomas) October 2, 2015
Sometimes I'm smart, and sometimes I google "is the martian based on a true story". For the record it is definitely not.— Rebecca Rennie (@raerennie) September 23, 2015
Two things could be happening here.
The first is that people are enjoying spreading the joke of "My mate is so thick he thought The Martian was real, lolz, wot?" - a joke that's only funny once.
The other, more concerning conclusion, is that people really do only use the internet to look at cat videos, and have never bothered to poke around on Wikipedia or NASA.org for more than five minutes.
For the record: The Martian is a book by Andy Weir, recently adapted by Ridley Scott for film. It stars Matt Damon, it's really good, and it's entirely made up. They don't even have any water up there.
Also - Titanic is based on historical events, as is Apollo 13. Avatar isn't. Nor are any of the Alien series.
Glad we could help.