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Thread: Hi, i'm new

  1. #1
    Guest
    I have some newbie questions for ya...

    1. What is the deal with this planet X?

    2. If Alpha Centori went supernova would
    the Earth be damaged.

    3. What does space "smell" like?

    4. Is space the same temp all the time
    or does it vary depending on where
    you are in space?

  2. #2
    Guest
    oops, i'm sorry, I put it in the wrong catergory.

  3. #3
    Join Date
    Oct 2001
    Posts
    2,677
    Hi, A&O! Welcome to the board.

    I hope I can give some answers to your questions.

    1. What is the deal with this planet X?

    Planet X is a hypothetical tenth planet. So far there hasn't been any solid evidence as to it's existence. See the other thread about it here:
    http://www.badastronomy.com/phpBB/vi...156&forum=1&46

    It's similar to the "Nemesis" theory, where the Sun supposedly has a smaller stellar companion. See here:

    http://www.badastronomy.com/phpBB/vi...=747&forum=1&6

    2. If Alpha Centori went supernova would
    the Earth be damaged.


    Well, first of all, Alpha Centauri is almost the same size as our own sun, which means that it's too small to ever go supernova. However, if we imagine that it's possible, then there would probably be some rather nasty effects from it. I'll leave it to others to explain them, as I don't know much about it myself. [img]/phpBB/images/smiles/icon_smile.gif[/img]

    3. What does space "smell" like?

    Good question. I would say that space doesn't "smell" like anything. Our sense of smell comes from sensors in our noses coming in contact with microscopic particles floating in the air. If we smell an onion, it's because we are picking up "onion particles", which our brain interprets as a certain smell. Since space is a near-perfect vacuum, there aren't enough particles around to sense, even if you could take of your space helmet and take a whiff (which I wouldn't recommend because the vacuum would suck the air out of your lungs).

    4. Is space the same temp all the time
    or does it vary depending on where you are in space?


    Once again, temperature depends on having some substance (such as air) to conduct heat. Since there isn't much of anything out there, there isn't any temperature.

    Actually this gets to be a very complex subject. Since space is actually not a perfect vacuum, there can be slight temperature variations. Physics also seperates the concepts of heat vs. temperature. Again, I'll leave it to others to explain more fully.

    And don't worry about posting in the wrong forum. The BA will move it if he feels it's necessary.

  4. #4
    Join Date
    Mar 2002
    Posts
    104
    plannet x is the death star. The hubble telescope caught this picture of it only a few days ago

    http://www.theforce.net/swtc/Pix/books/weg/dstc3.gif was caught by hubble on the 20th march 2002

    lucky i hacked their server and got it off them by force. they aint realising the picture or any other info thinking people my panic.[img]/phpBB/images/smiles/icon_eek.gif[/img]

    oh ya, a BIG WELCOME TO THE BOARDS

  5. #5
    Join Date
    Oct 2001
    Posts
    872
    From an old Isaac Asimov column, Antares and Betelgeuse are candidates for Novas, and Antares isn't too awfully far away...

    Poul Anderson wrote a wonderfully chilling novel about trying to save a civilization doomed by a nearby supernova, "Day of Burning."

    Silas

  6. #6
    Join Date
    Jan 2002
    Location
    The Valley of the Sun
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    9,555
    If a Supernova exploded 4 light years from us the neutrino dectectors would certainly be busy. A detector that got about 10 hits from Supernova 1987A at 160,000 light years away should get about 1,600,000,000 hits from the Alpha Centauri Supernova.
    Last edited by Chuck; 2011-Feb-19 at 12:33 AM.

  7. #7
    Join Date
    Oct 2001
    Location
    Clear Lake City, TX
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    12,629
    On 2002-03-24 19:48, Alpha and Omega wrote:
    2. If Alpha Centori went supernova would
    the Earth be damaged.
    While A Centauri poses no problem as it is highly unlikely to go supernova, if there were a supernova that close... or perhaps even as far away as 1000LY... the result could be devestating.

    http://www.space.com/scienceastronom..._010522-1.html
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  8. #8
    Join Date
    May 2004
    Posts
    6,823
    Quote Originally Posted by Martian Jim
    plannet x is the death star. The hubble telescope caught this picture of it only a few days ago

    http://www.theforce.net/swtc/Pix/books/weg/dstc3.gif was caught by hubble on the 20th march 2002

    lucky i hacked their server and got it off them by force. they aint realising the picture or any other info thinking people my panic.<IMG SRC="/phpBB/images/smiles/icon_eek.gif">

    oh ya, a BIG WELCOME TO THE BOARDS
    yeah and every ones saying its a moon of saturns; mimas yeah right :wink:

  9. #9
    Join Date
    Feb 2011
    Posts
    2
    WE'RE ALL GONA DIE!!!!!!!!!!!!!!!!!
    the milky way will collapse on itself and suck everything else in >5 billion years! FLY FOR YOUR LIVES!!!

    well, we WILL have to use spaceships to get out of this doomed planet!

  10. #10
    Join Date
    Mar 2008
    Posts
    1,809
    Thread necromancy alert!

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