I mean, aren't we standing on a sphere?

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Fri, 02/27/2015 - 2:52pm


Thu, 11/04/2010 - 2:54am
fmm.86 Says:

I know it's not a perfect sphere, but you get me.

Thu, 11/04/2010 - 4:18am
koshka Says:

I just can;t believe we're in the universe right now

Sat, 01/22/2011 - 9:16pm
cisco_kid Says:

lmao I found this comment hilarious.

You're a towel!!!

Fri, 06/13/2014 - 1:39pm

I mean, maybe we're oriented upside down on Earth, but how is Earth oriented in the solar system, in the Milky Way, in the universe. We're infinitesimal.

Sun, 11/30/2014 - 2:23pm
ripozipo Says:

The world is upside down. The magnetic North Pole is our South Pole.

Thu, 12/25/2014 - 4:24am
Stickers Says:

To us, down is towards the Earth. So which way is down if you escape Earth's gravity?

Sun, 02/08/2015 - 7:05am

All relative. And that's usually better with a bowl

Sat, 02/14/2015 - 6:50pm
CoolAidMan Says:

This question is closely related to the conservation of angular momentum. In both classical and quantum mechanics, angular momentum is conserved when all the dynamics of a system are invariant with respect to infinitesimal rotations. Therefore, as long as we trust that our theories of mechanics are correct, we can test the isotropy of space by doing some experiments and seeing whether angular momentum is conserved. If angular momentum is not conserved in our experiments, then we are in a situation where we can detect rotations.

For example, on the surface of the earth, you can drop a ball and its angular momentum increases as it falls (relative to some axis to the side of the ball's trajectory). This indicates that the system (you + ball) can tell if you've been rotated. However, if we include the Earth itself in the system, angular momentum is again conserved because the Earth (theoretically) picks up equal and opposite angular momentum to the ball as it falls. When we rotate the Earth, you, and the ball all through the same angle, you won't be able to tell. The astronauts will probably find that unless their experiments are extraordinarily sensitive, angular momentum is conserved for the system (astronaut+ship+its fuel+everything in it), so no, the astronauts will not be able to tell they've been rotated. Finally, note that rotating a system through an angle does not refer to giving it an angular velocity. You can tell if you're actively spinning or not. You just can't tell your orientation relative to distant stars.

there ya go. my dad wrote that for yall

Sat, 03/14/2015 - 4:09am
Sun, 02/15/2015 - 7:36pm
Thu, 02/19/2015 - 9:09pm
irie_fyah Says:

Psychologists distinguish between two types of processes in perception: bottom-up processing and top-down processing.

Bottom-up processing is also known as data-driven processing, because perception begins with the stimulus itself. Processing is carried out in one direction from the retina to the visual cortex, with each successive stage in the visual pathway carrying out ever more complex analysis of the input.

Top-down processing refers to the use of contextual information in pattern recognition. For example, understanding difficult handwriting is easier when reading complete sentences than when reading single and isolated words. This is because the meaning of the surrounding words provide a context to aid understanding.

Sun, 02/22/2015 - 3:58pm
CoolAidMan Says:

Well... we have vectors in space - we know where something is and how far away it is. But our orientation relative to something else doesn't matter.

In a gravity field, you have an up & down - gravity is one of the factors in our bodies' design - and we use "up" and "down" as references. While people on the other side of the Earth are comparatively upside down to us - our feet point to them, and theirs point to us - intuitively, both them and us know that 'down' means toward the center of the Earth, and 'up' means out toward space. But, once you're in space - there's no focusing of direction. What you say is "up" means nothing to me if I don't choose to agree with you, and vice verse - my meaning for 'up' may or may not have meaning to you.

We may agree that "Up" means toward the Andromeda galaxy, or maybe a distant quasar, but we would physically have to *think* about which direction that is, as we wouldn't be able to physcially just 'tell' which way is up or down.

Sat, 02/28/2015 - 12:31am

right side up is relative and based on perspective. you're always right side up for yourself, but things around you can appear upside down if you alter your perspective. for example, if you hang your legs over a tree branch and lay back, you see the things on earth as being "upside down", but they're the same as they were before your perspective changed. if you were hanging on the tree branch and looked at a mirror, you would appear right side up, and whatever was behind you would appear upside down. if you want an easy way to know which way is right side up, figure out the opposite way gravity goes. gravity always goes relatively "down", so right side up is the other way, relatively "up".

Mon, 03/16/2015 - 7:56pm
Kulfon Says:

Whoa if you think about it there isn't really up or down in the first place, we just created it and it's depended on our point of view. It doesn't apply to space, space is badass...

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Wed, 04/01/2015 - 11:30am

What's even crazier to think about is that, to the sphere we're standing on, there is no up or down. There is only infinite indiscernible space in all directions.

Sat, 04/18/2015 - 5:04am

Well, our eyes interpret the world right side up, however its an illusion. So its hard to say up or down, when absolute time and space are relative to your reality. When you get into different realities, well, whose to say we aren't as alone as humans as compared to an alien on another planet, after all time and space depend on your reality;). lol I believe i'm #sterned

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Wed, 10/21/2015 - 9:01am

There is no up and down left or right in space travel. Location is relative:P