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Are we living inside a blackhole?

Comments

  • Closed Accounts Posts: 6,388 ✭✭✭gbee


    Some people believe that the moon landings were a hoax, becuse they conclude that man could not survive a trip outside Earth.

    Maybe they have a point of sorts, but it originates from not being able to escape a black hole.


  • Registered Users, Registered Users 2 Posts: 90 ✭✭The_D_Man


    isnt the singularity of infinite density and zero volume though?


  • Closed Accounts Posts: 266 ✭✭bytey


    gbee wrote: »
    Some people believe that the moon landings were a hoax, becuse they conclude that man could not survive a trip outside Earth.

    Maybe they have a point of sorts, but it originates from not being able to escape a black hole.


    no , they think its a hoax because some people ( quite plausibly )
    think that man cannot survive flying greater than 300- 400 miles away from the earth due to the van allen radiation belts surrounding the earth.

    the space shuttle is not allowed to go farther than 350 or so , even though it can orbit quite high - due to the effects of radiation on the crew.

    nothing to do with black holes.


  • Closed Accounts Posts: 3,817 ✭✭✭ynotdu


    bytey wrote: »
    no , they think its a hoax because some people ( quite plausibly )
    think that man cannot survive flying greater than 300- 400 miles away from the earth due to the van allen radiation belts surrounding the earth.
    Hi bytey,This as You say was a genuine concern but unless people believe the CT's that Apollo never happened,on return from Space the Apollo Astronauts showed no sign of increased radiation levels[Armstrong is now 80.Glenn even older] nobody thinks hanging around the Van Allen belt for long is a good idea though!:)

    the space shuttle is not allowed to go farther than 350 or so , even though it can orbit quite high - due to the effects of radiation on the crew.

    It is not so much that it is not allowed,it was designed for Low Earth Orbit
    nothing to do with black holes.

    The main black hole on Boards is AH's it seems to suck everybody into it!:D

    Good thread with potential to be very educational OP


  • Moderators, Science, Health & Environment Moderators Posts: 3,645 Mod ✭✭✭✭Beeker


    bytey wrote: »
    no , they think its a hoax because some people ( quite plausibly )
    think that man cannot survive flying greater than 300- 400 miles away from the earth due to the van allen radiation belts surrounding the earth.

    the space shuttle is not allowed to go farther than 350 or so , even though it can orbit quite high - due to the effects of radiation on the crew.

    nothing to do with black holes.
    As ynotdu said the Shuttle was designed for low earth orbit and cannot fly beyond about 400 miles high. The Apollo astronauts suffered no ill effects from flying through the van allen belt simply because they passed through it quickly, spending very little time there.
    Lets get this straight....they did land on the Moon.........Peroid.:)


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  • Closed Accounts Posts: 5,482 ✭✭✭Kidchameleon


    bytey wrote: »
    the space shuttle is not allowed to go farther than 350 or so , even though it can orbit quite high



    Am I right in saying it went much higher when the were originally deploying Hubble?


  • Closed Accounts Posts: 3,817 ✭✭✭ynotdu


    Am I right in saying it went much higher when the were originally deploying Hubble?

    more than a trip to the ISS who's Orbit is on average 190 miles.
    a trip to Hubble uses about 50% of the available fuel onboard the Orbiter before it makes any other use of its thrusters etc, almost the very limits a Shuttle can achieve at a push.

    If the Shuttle was to carry no payload at all and reduced weight in every way it could according to this article reach 600 miles max,but not much point to that. :)

    What's important to take away from this is that the space shuttle is limited in altitude because it CAN'T carry infinite fuel. Even if they lighten the orbiter so much that they don't even carry anything in they payload bay, it's not going to go higher than 600 miles up. When they designed the space shuttle, they never meant it to go any higher than altitudes that are within Low Earth Orbit (LEO).

    http://answers.yahoo.com/question/index?qid=20080528090214AAbQo0D

    • The Hubble Space Telescope whirls around Earth at a speed of 5 miles per second.
    • Orbit: At an altitude of 307 nautical miles (569 km, or 353 miles), inclined 28.5 degrees to the equator (low-Earth orbit)
    • Time to Complete One Orbit: 97 minutes
    • Speed: 17,500 mph (28,000 kph)
    http://space.about.com/od/telescopesandoptics/p/hubbleinfo.htm

    This was the best info i could find on the Van Allen Radiation belt:


    The Van Allen Radiation Belts are trapped in the Earth's geomagnetic fields. There are two belts which are toroidal (shaped like donuts or bagels) with Earth at the center. Both belts, an inner belt and an outer belt, are composed of plasma (highly energetic charged particles such as electrons and protons).

    The Van Allen belts are oddly shaped toroids, however, because their shape is distorted by the "Solar Wind" of particles streaming from the Sun. The Earth, rotating at the center of the toroids, is roughly 8,000 miles (13,000 km) wide and nearly circular. The outer Van Allen belt extends roughly 8,000 miles (13,000 km) into space on the sunny side of the Earth and roughly 56,000 miles (91,000 km) into space on the dark side. The inner belt extends roughly 1/2 the distances of the outer belt.
    magnetosphere.


    http://wiki.answers.com/Q/What_is_the_location_of_the_van_allen_radiation_belts


  • Moderators, Science, Health & Environment Moderators Posts: 3,645 Mod ✭✭✭✭Beeker


    Am I right in saying it went much higher when the were originally deploying Hubble?
    The highest altitude ever achieved by the Shuttle is 385 miles during the Hubble deployment on STS-31 in April 1990.

    sts31flightinsignia.png


  • Registered Users, Registered Users 2 Posts: 112 ✭✭H. Flashman


    getting back on to the original topic (and way from the moon hoax business :rolleyes: ) yeah I was reading a thing the other day which was saying the same thing - since nobody really knows what a singularity really is and since there are only two known things which can be described as being infinately dense and being infinately small - a singularity in a black hole and the singularity at starting point of the entire universe (the big big bang) we have something interesting to think about.

    The theory talks about something called white holes - i.e. the other end of a black hole. and suggests that the universe was caused by one such white hole.

    Its like if you think of the way gravity warps and bends space time - a black hole doesn't just warp and bend space it literally rips a hole in it. (There is no space or time in a black hole) You could almost say once you enter a black hole you are no longer in the universe - you are are outside it. and this is where the idea of another universe is coming from


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