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New place to go riding! Just a bit of a commute.

Discussion in 'The Pub' at netrider.net.au started by pro-pilot, Jan 6, 2008.

  1. http://news.bbc.co.uk/2/hi/science/nature/6589157.stm

    Looks like there would be heaps of twisties!

    New 'super-Earth' found in space


     
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  2. The higher gravity might make cornering interesting

    You seriously wouldn't want to drop your bike (or pick it up afterwards)

    Even assuming your body could cope
     
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  3. 20.5 light-years away.
    How many fuel stops on a Firestorm is that? :LOL: :LOL:
     
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  4. 5 times the mass.
    That means a gravity of around 50m/s...
    A 13 day orbit, (I wonder what it's rotation is like?)
    With those numbers the chance of life would likely be remote. At least anything more advanced than single cell, or colony sludge.
    But it does show that “Earthlike†planets are not impossible to find
     
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  5. Not correct.

    Surface gravity is a function of mass and planetary diameter. The larger the planet is dimensionally the more dispursed the effects of the surface gravity.

    Even though the planet is 5 times as massive. It is spread out over a much greater radial distance. Also it is important to note the mass distributiuon of the planet (eg. does it have an iron core etc.).

    It is likely to have a SG of around 1.5 to 2.3 g's.

    Still a very lethargic planet to get around on.
     
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  6. 1 light year = 9.460584 * 10^12 km
    20.5 light years = 193,940,832,200,000 kms
    avg 250 km / tank = 775,763,328,800 fill ups
    to fill up a 10l tank at 1.50 per litre = $11,636,449,9332,000 one way

    At a top avg speed of 250km/hr it will take you 88,506,939 years :grin: :grin:
     
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  7. Work that out in todays dollars! :LOL:

    NPV of a dollar in todays value based on a time span of 88 million years :shock:
     
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  8. [quote="pro-pilot]Not correct.

    Surface gravity is a function of mass and planetary diameter. The larger the planet is dimensionally the more dispursed the effects of the surface gravity.

    Even though the planet is 5 times as massive. It is spread out over a much greater radial distance. Also it is important to note the mass distributiuon of the planet (eg. does it have an iron core etc.).

    It is likely to have a SG of around 1.5 to 2.3 g's.

    Still a very lethargic planet to get around on.[/quote]

    5 times the mass and 1.5 times the diameter. Lets do the maths placing that whole mass at the extremity of the diameter difference.

    F m/s^2
    F 5/1.5^2
    =5/2.25
    =2.2..
    Now we know that
    A) The mass is not all at this extremity
    8) That the core will be denser and is far closer.
    So you are correct that it will be less than 5 times the gravity, but it will be far more than 1.5SG and I would be willing to say noticeably larger than 2.3SG

    Maths simplified because I CBF working it out more accurately (Brain is still on holiday)
     
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  9. Agree Falcon.

    g = GM/r^2

    Using earth as the reference unit of 1

    g = 1 x 5 / 1.5 ^2 = 2.2

    However. The distribution of mass could be 60% in 60% of the diameter.

    Effectively reducing this to about 2.0 g's? (limited information here, so best estimate).

    Would still be crushing.
     
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  10. What's the mochachino cost if you take a Ducati instead?
     
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  11. Agreed.
     
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  12. Well lets assume you have one at every tank fill up. and they are about $3 each...

    775,763,328,800 stops * $3 = $2,327,289,986,400 :p
     
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  13. Good maths but let me know when you find a Firestorm that gets 250/tank :LOL:
     
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  14. Well if ya wanna get stupid about it. In space you will not keep a constant speed. You will keep accelerating. You would need to re-fill (that time you will have a constant velocity) but until you reach mid-point (10.25 ly then turn around to decelerate).
     
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  15. :roll: :p
     
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  16. bugger off, i get 240kms before i hit reserve and there is still 5L in the tank :grin:
     
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