The Naked Scientists

The Naked Scientists Forum

Author Topic: Is there an up or down in space?  (Read 3988 times)

JeffV.

  • Guest
Is there an up or down in space?
« on: 01/03/2011 02:30:04 »
JeffV. asked the Naked Scientists:
   
Is there an up or down in space if you are out of Earth's gravity effect?

What do you think?
« Last Edit: 01/03/2011 02:30:04 by _system »


 

Offline juhuhu.

  • First timers
  • *
  • Posts: 4
    • View Profile
Is there an up or down in space?
« Reply #1 on: 01/03/2011 21:08:19 »
if space is timeless I don`t think there is any up or down or left or right (:
 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 11993
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Is there an up or down in space?
« Reply #2 on: 01/03/2011 21:18:55 »
It's the same as with divers deep down or at night, very dangerous as all directions become the same, no up or down..
 

Offline syhprum

  • Neilep Level Member
  • ******
  • Posts: 3820
  • Thanked: 19 times
    • View Profile
Is there an up or down in space?
« Reply #3 on: 01/03/2011 22:13:43 »
Although we are not allowed to have an ether any more we can have a pseudo ether by measuring our motion relative to the CMBR which would present a real barrier to near light speed travel as the CMBR photons would be blue shifted to gamma rays.
up and down could only be considered in relation to a local galaxy space proper could have no up or down.
 

Offline Bill S

  • Neilep Level Member
  • ******
  • Posts: 1825
  • Thanked: 12 times
    • View Profile
Is there an up or down in space?
« Reply #4 on: 01/03/2011 22:21:12 »
Surely, up and down are defined in terms of direction in a gravitational field.  Granted, gravitational effects permeate the Universe, but in space the directional element is not sufficiently noticeable to make up and down readily recognisable.  
 

Offline Soul Surfer

  • Neilep Level Member
  • ******
  • Posts: 3345
  • keep banging the rocks together
    • View Profile
    • ian kimber's web workspace
Is there an up or down in space?
« Reply #5 on: 01/03/2011 23:45:48 »
Yes there is a specific direction that can be measured throughout the universe but it is different for different objects though.  The direction is your direction of motion and speed with respect to the cosmic microwave background.  For the solar system the speed is about 350km/sec
 

Offline Geezer

  • Neilep Level Member
  • ******
  • Posts: 8328
  • "Vive la résistance!"
    • View Profile
Is there an up or down in space?
« Reply #6 on: 02/03/2011 03:01:30 »
There is no agreement about the direction of "up" on Earth, so it's unlikely there will be any more agreememnt in space.
 

Offline Bill S

  • Neilep Level Member
  • ******
  • Posts: 1825
  • Thanked: 12 times
    • View Profile
Is there an up or down in space?
« Reply #7 on: 05/03/2011 17:53:42 »
Quote from: Geezer
There is no agreement about the direction of "up" on Earth,

Isn't up generally accepted as following a line from the centre of the Earth through the surface.  "Onwards and upwards".
 

Offline Bored chemist

  • Neilep Level Member
  • ******
  • Posts: 8665
  • Thanked: 42 times
    • View Profile
Is there an up or down in space?
« Reply #8 on: 05/03/2011 20:21:13 »
Quote from: Geezer
There is no agreement about the direction of "up" on Earth,

Isn't up generally accepted as following a line from the centre of the Earth through the surface.  "Onwards and upwards".
Yes, which means that my friend in New Zealand thinks it's pretty much the opposite of what I think.
I think up is more or less in the direction of the North star; he  thinks it's heading for the Southern cross.
 

Offline Heikki Rinnemaa

  • Full Member
  • ***
  • Posts: 92
  • MoHei. :)
    • View Profile
    • My website.
Is there an up or down in space?
« Reply #9 on: 07/03/2011 17:37:08 »
Hei. :)


Space has up-down-left-right-forw-back, depend at what direction you look it.

I made image to view it, and then wake up question;

Which point x-y-z-direction of space is earth?

I dont know that point and i think that we do not have answer of that, because we dont know what is the size of space, hmm,,i'm pretty sure of that. :)
 

The Naked Scientists Forum

Is there an up or down in space?
« Reply #9 on: 07/03/2011 17:37:08 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums
 
Login
Login with username, password and session length