Spacetime (18)

1 Name: Anonymous Scientist : 2007-06-24 14:54 ID:Si2eOGyN

What is spacetime made of?

2 Name: Anonymous Scientist : 2007-06-24 17:45 ID:Heaven

Still unsolved. You could easily have searched it yourself.

3 Name: Anonymous Scientist : 2007-06-24 22:49 ID:cvJjcwWN

Space + Time?

4 Name: Anonymous Scientist : 2007-06-24 22:56 ID:2HyzNHk2

In reality, nobody knows.

5 Name: Anonymous Scientist : 2007-06-24 23:45 ID:2kO4ZCAQ


6 Name: Anonymous Scientist : 2007-06-25 03:08 ID:cvJjcwWN

Does it ()?

7 Name: Anonymous Scientist : 2007-06-25 05:11 ID:lhXcdMzr

If such a fundamental question is not answered,how much can we rely on science?

8 Name: Anonymous Scientist : 2007-06-25 16:46 ID:cvJjcwWN

9 Name: Anonymous Scientist : 2007-06-26 07:40 ID:RW7u16wP

Nope it doesn't tells a thing about what is spacetime made of.

10 Name: Anonymous Scientist : 2007-06-26 07:48 ID:Heaven

Spacetime is made from space and time.
Pancakes are made out of pancakes and maple syrup.

11 Name: Anonymous Scientist : 2007-06-26 09:27 ID:M8Z4FcmR

>>1 hacked perl code

12 Name: Anonymous Scientist : 2007-06-26 12:03 ID:inXiTW81


If you don't understand how to derive algebra from Zermelo–Fraenkel set theory, how much can I rely on you giving me correct change at the supermarket checkout?

13 Name: Anonymous Scientist : 2007-06-26 12:26 ID:cvJjcwWN

>>9 Look up "Continuum".

14 Name: Anonymous Scientist : 2007-06-26 13:26 ID:RW7u16wP

For physical reasons, a space-time continuum is mathematically defined as a four-dimensional, smooth, connected pseudo-Riemannian manifold together with a smooth Lorentz metric of signature \left(3,1\right). The metric determines the geometry of spacetime, as well as determining the geodesics of particles and light beams. About each point (event) on this manifold, coordinate charts are used to represent observers in reference frames. Usually, Cartesian coordinates \left(x, y, z, t\right) are used. Moreover, for simplicity's sake, the speed of light 'c' is usually assumed to be unity.

A reference frame (observer) can be identified with one of these coordinate charts; any such observer can describe any event p. Another reference frame may be identified by a second coordinate chart about p. Two observers (one in each reference frame) may describe the same event p but obtain different descriptions.

15 Name: it : 2007-06-26 20:01 ID:gLbUzsYk

If I answer that you'll ask Well?? What's THAT made out of???!?.

16 Name: dmpk2k!hinhT6kz2E : 2007-06-27 16:52 ID:Heaven

It's stuff all the way down, young man.

17 Name: Anonymous Scientist : 2007-07-15 13:04 ID:Heaven

Time and space are relational concepts. They are meaningless outside the context of events and objects in them.

18 Name: Anonymous Scientist : 2007-12-05 20:05 ID:06nbYD8q


I lol'd.

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