The Naked Scientists

The Naked Scientists Forum

Author Topic: Will this be the end of the Earth?  (Read 2583 times)

Offline DoctorBeaver

  • Naked Science Forum GOD!
  • *******
  • Posts: 12656
  • Thanked: 3 times
  • A stitch in time would have confused Einstein.
    • View Profile
Will this be the end of the Earth?
« on: 07/06/2007 11:22:39 »
I came across this on another forum & I'd like some comments from the experts here as I trust you more. Thanks.

http://www.frihost.com/forums/vt-73610.html

As here, you don't have to join to read the thread.


 

Offline daveshorts

  • Moderator
  • Neilep Level Member
  • *****
  • Posts: 2583
  • Physics, Experiments
    • View Profile
    • http://www.chaosscience.org.uk
Will this be the end of the Earth?
« Reply #1 on: 07/06/2007 17:37:03 »
I had a look at the website they were referring to, and as far as I can see it is looking at something which we can see has already exploded. In which case any gamma rays have already got here.  for some reason he is quoting what would happen if all the mass in the object got converted into gamma rays (1 photon for god knows what reason). i have no idea why this would happen.

His possible options for us if something nearby does go supernova is silly - we are unlikely to have the technology to outrun a gamma ray burst if it is leathel at 10 000 light years it will  be pretty bad at 20 000 light years too, we are not going to get away. Better to bury yourself deep in a moon or for that matter the earth and wait it out.
 

Offline DoctorBeaver

  • Naked Science Forum GOD!
  • *******
  • Posts: 12656
  • Thanked: 3 times
  • A stitch in time would have confused Einstein.
    • View Profile
Will this be the end of the Earth?
« Reply #2 on: 07/06/2007 18:10:22 »
I didn't understand the "1 photon" bit either. I thought maybe I was missing something fundamental.

Quote
Better to bury yourself deep in a moon or for that matter the earth and wait it out.

Couldn't I just hide in the coal shed?  :D
 

Offline Bored chemist

  • Neilep Level Member
  • ******
  • Posts: 8667
  • Thanked: 42 times
    • View Profile
Will this be the end of the Earth?
« Reply #3 on: 07/06/2007 19:01:32 »
I vote for hiding behind either the sofa or the planet earth, whichever is easier.
One of the poles is likely to be hidden from the "explosion " by the whole planet. Anyone want to book a rather cold holiday ? (BTW, this wouldn't really help- the damage done to the atmosphere would kill us anyway but it does mean that some life would survive on earth.)
 

Offline daveshorts

  • Moderator
  • Neilep Level Member
  • *****
  • Posts: 2583
  • Physics, Experiments
    • View Profile
    • http://www.chaosscience.org.uk
Will this be the end of the Earth?
« Reply #4 on: 08/06/2007 10:05:00 »
Yeah it would probably involve building an underground nuclear powered biosphere to produce you oxygen etc... but you would have to do this if you wanted to build a spaceship anyway.
 

The Naked Scientists Forum

Will this be the end of the Earth?
« Reply #4 on: 08/06/2007 10:05:00 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums