posted on Apr, 21 2013 @ 07:56 AM
Originally posted by 0bserver1
reply to post by AndyMayhew
Kepler-62f is only 40 percent larger than Earth
I wonder if the mass of this planet is bigger than ours,because of it's size? And if so would life be smaller or shorter then we are, if life exists
there that is..?
edit on 18-4-2013 by 0bserver1 because: (no reason given)
The mass depends more on the density and distribution of elements. If you compare the weight of heavy elements, you'll find that gold is 19.3 times
more dense than water; 1 cubic metre of water= 1 tonne, 1 cubic meter of iron = 7.83 tonnes, 1 cubic meter of gold = 19.3 tonnes. So for a planet
that has a large core made of heavy elements yet a smaller radius than the earth, gravity would still be heavier.
The most pronounced effect of increasing gravity is that the atmosphere would be at a higher pressure. If oxygen is present at levels over 10% but not
inert gases like nitrogen, neon, , then that has all sorts implications for spontaneous combustion and oxidisation (as in a car engine). Anything made
from carbon and hydrogen would spontaneously ignite unless protected by shells or oils. There's also theory that the higher levels of oxygen and heat
in the past allowed plants, insects and animals to grow much larger than they are now. Of course, if you have oceans, then that is the perfect
solution. But higher air pressures would make winged flight much easier. It might even be possible for land creatures to have their own "buoyancy
tanks" like fish do.
Life could adapt in many other ways, giraffes have a complex system of blood vessels in their necks to regulate the blood supply to their brains.
There is a theoretical limit on the height of humans being around 2 meters due to fatal brain injuries from falling. For higher levels of gravity,
being shorter and more muscular would be the safer option.