instruction: I want to read The Martian - Andy Weir pdf file, so view The Martian - Andy Weir pdf file in the PDF Extra app.

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      content_description: "Chapter 1\r\nLOG ENTRY: SOL 6\r\nI’m pretty much fucked.\r\nThat’s my considered opinion.\r\nFucked.\r\nSix days in to what should be a greatest two months of my life, and\r\nit’s turned in to a nightmare.\r\nI don’t even know who’ll read this. I guess someone will find it\r\neventually. Maybe a hundred years from now.\r\nFor the record… I didn’t die on Sol 6. Certainly the rest of the crew\r\nthought I did, and I can’t blame them. Maybe there’ll be a day of national\r\nmourning for me, and my Wikipedia page will say “Mark Watney is the\r\nonly human being to have died on Mars.”\r\nAnd it’ll be right, probably. Cause I’ll surely die here. Just not on Sol\r\n6 when everyone thinks I did.\r\nLet’s see… where do I begin?\r\nThe Ares program. Mankind reaching out to Mars to send people to\r\nanother planet for the very first time and expand the horizons of\r\nhumanity blah, blah, blah. The Ares 1 crew did their thing and came back\r\nheroes. They got the parades and fame and love of the world.\r\nAres 2 did the same thing, in a different location on Mars. They got a\r\nfirm handshake and a hot cup of coffee when they got home.\r\nAres 3. Well. That was my mission. Well, not mine per se.\r\nCommander Lewis was in charge. I was just one of her crew. Actually, I\r\nwas the very lowest ranked member of the crew. I would only be “in\r\ncommand” of the mission if I were the only remaining person.\r\nWhat do you know? I’m in command.\r\nI wonder if this log will be recovered before the rest of the crew die of\r\nold age? I presume they got back to Earth all right. Well, guys, if you’re\r\nreading this: It wasn’t your fault. You did what you had to do. In your\r\nposition I would have done the same thing. I don’t blame you, and I’m\r\n"
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      content_description: "glad you survived.\r\nI guess I should explain how Mars missions work, for any layman\r\nwho may be reading this. We got to earth orbit the normal way, through\r\nan ordinary ship to Hermes. All the Ares missions use Hermes to get to\r\nand from Mars. It’s really big and cost a lot so NASA only built one.\r\nOnce we got to Hermes, four additional unmanned missions brought\r\nus fuel and supplies while we prepared for our trip. Once everything was\r\na go, we set out for Mars. But not very fast. Gone are the days of heavy\r\nchemical fuel burns and trans-Mars injection orbits.\r\nHermes is powered by ion engines. They throw Argon out the back of\r\nthe ship really fast to get a tiny amount of acceleration. The thing is, it\r\ndoesn\'t take much reactant mass, so a little Argon (and a nuclear reactor\r\nto power things) let us accelerate constantly the whole way there. You\'d\r\nbe amazed at how fast you can get going with a tiny acceleration over a\r\nlong time.\r\nI could regale you with tales of how we had great fun on the trip, but I\r\nwon’t. We did have fun, but I don’t feel like reliving it right now. Suffice\r\nit to say we got to Mars 124 days later without strangling each other.\r\nFrom there, we took the MDV (Mars Descent Vehicle) to the surface.\r\nThe MDV is basically a big can with some light thrusters and parachutes\r\nattached. Its sole purpose is to get six humans from Mars orbit to the\r\nsurface without killing any of them.\r\nAnd now we come to the real trick of Mars exploration: Having all\r\nour shit there in advance.\r\nA total of 14 unmanned missions deposited everything we would need\r\nfor surface operations. They tried their best to land all the supply vessels\r\nin the same general area, and did a reasonably good job. Supplies aren’t\r\nnearly so fragile as humans and can hit the ground really hard. But they\r\ntended to bounce around a lot.\r\nNaturally, they didn’t send us to Mars until they’d confirmed all the\r\nsupplies had made it to the surface and their containers weren’t breached.\r\nStart to finish, including supply missions, a Mars mission takes about 3\r\nyears. In fact, there were Ares 3 supplies en route to Mars while the Ares\r\n"
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