Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors). The Moon's ground speed varies pretty regularly, making a kind of sine wave. In general, the fact that the Earth spins is very fortunate for you, and for the planet's overall habitability. from $19.00 QR Code. Apparently a "lot of things" not limited to atomic fusion, generation of plasma and a substantial atomic blast. Cayambe, a volcano north of Chimborazo. [[A large black circle with white bubbles inside it, filled with hearts, question marks, and stick figure couples]] Reddit has thousands of vibrant communities with people that share your interests. This is tricky to calculate, because the Moon's ground speed varies over time in a complicated way. The purpose of a "what-if" scenario is to consider what effects might be caused if some event or invention had come about. He likes candlelight dinners and long walks on the beach. It's common knowledge that Mt. This leads to a roughly sine-wave shaped ground speed: Ok, fine. What if I'm making a mistake? Millions of people visit xkcd.com each week to read Randall Munroe’s iconic webcomic. This means you're free to copy and share these comics (but not to sell them). Luckily for us, it doesn't vary that much—it's usually somewhere between 390 and 450 m/s, or a little over Mach 1—so figuring out the precise value isn't necessary. World-record pole climbers[4]Of course there's a world record for pole climbing. [12]It's common knowledge that Mt. The land and atmosphere below you are moving very fast relative to you. It peaks twice every month as it passes over the fast-moving equator, then reaches a minimum when it's over the slower-moving tropics. from $19.00 Correlation. from $19.00 Woodpecker. When the Moon is over a point farther from the equator, it has a lower "ground speed," so the lower end of the sine wave goes lower. Do you make a distinction between shallots, scallops, and scallions? /r/xkcd is the subreddit for the popular webcomic xkcd by Randall Munroe. {{Title text: I once made an anniversary card for my then-girlfriend with this layout. The illustrated book, released on September 2, answers reader-submitted questions about imaginary scenarios that spark Munroe’s interest. First, let's get a few things out of the way: In real life, we can't put a metal pole between the Earth and the Moon. In my opinion, it's worth going outside and looking at the Moon whenever it's full, regardless of whether it's super or not. xkcd is a webcomic created by Randall Munroe, a former contractor for NASA.He describes it as "a webcomic of romance, sarcasm, math, and language." There's one other cycle we can take into account to really nail down the Moon's ground speed. The Earth is pretty big, so you reach this point—which is known as the L1 Lagrange point—while you're still pretty close to the Moon. from $19.00 Compiling. Try to avoid the tropical jet stream, an upper-level air current which blows in the same direction the Earth rotates. On the Moon, gravity is much weaker, so it will probably be easier to climb. How long would it take to slide down from the Moon? (For more on this, see this What If question).Heat shields only work for slowing down; if there were a way to use the same heat shield mechanism to speed up, space travel would get a lot easier. Asking how fast the pole is moving relative to the surface is effectively the same as asking what the "ground speed" of the Moon is. The pole would be torn in half. Hopefully in a couple of weeks we'll be able to resume our apple-focused updates, because we have SO MUCH to say about Cosmic Crisp. A somewhat more obscure piece of trivia is that the point on the Earth's surface farthest from its center is the summit of Mt. This work is licensed under a For Want of a Nail is a what-if … More details. Sadly, no one's figured out a practical way to build a "reverse heat shield" rocket. I have a lot of mountain facts. Let's all just be glad that Earth keeps rotating. A somewhat more obscure piece of trivia is that the point on the Earth's surface farthest from its center is the summit of Mt. The Moon orbits around the Earth at a speed of roughly one kilometer per second, making a wide circle[10]Yes, I know, orbits are conic sections which in the case of the Moon is technically not exactly a circle. At some point, to reach the ground, you're going to have to let go of the pole. Join. Thanks to heat shields, slowing down is, Yes, I know, orbits are conic sections which in the case of the Moon is. [15]For aerodynamic reasons, this gear should probably make it look like you're wearing a very fast airplane. [7]At the distance of the Moon's orbit and the speed it's traveling, centrifugal force pushing away is exactly balanced by the Earth's gravity—which is why the Moon orbits there. ~AgentMuffin. Unfortunately, in this case, it's probably going to be both. At the distance of the Moon's orbit and the speed it's traveling, centrifugal force pushing away is exactly balanced by the Earth's gravity—which is why the Moon orbits there. Munroe states there is no particular meaning to the name and it is simply a "treasured and carefully-guarded point in the space of four-character strings." Even if an object is moving slowly when it's drifting through space, when it gets close to the Earth it gets accelerated up to at least escape velocity by that final segment of the trip down into the Earth's gravity well.—and the impact with the air will produce so much heat that you risk burning up. (When you're done, remember to remove the fire pole. Here's Randall Munroe's TED talk about his What If? And now you know.​[13]Mt. This means you're free to copy and share these comics (but not to sell them). As you approach the L1 point, you'll start to be able to switch from climbing to pushing-and-gliding: You can push once and then coast a long distance up the pole. xkcd, sometimes styled XKCD, is a webcomic created in 2005 by American author Randall Munroe. At worst, your hands and the surface of the pole will both be converted into exciting new forms of matter, and then you'll be flung away and plummet to your death. : Serious Scientific Answers to Absurd Hypothetical Questions is due out September 2. For one, someone at NASA would probably yell at us. Assuming you descend slowly and enter the atmosphere in a controlled manner, you'll soon encounter your next problem: Your pole isn't moving at the same speed as the Earth. That's how fast the top end of our hypothetical fire pole will be traveling. Reddit gives you the best of the internet in one place. At first, the combination of the Moon's gravity and centrifugal force are stronger, pulling you toward the Moon, but as you get closer to the Earth, Earth's gravity takes over. A few of my favorites: * What happens when a Baseball is pitched at 90% of the speed of light? 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