On September 13 2011 08:37 FeyFey wrote: we just move the whole universe not the ship. That way we don't have to make the ship move faster then the light.
I like this man's plan.
Not a man ;( a girl ! But i stole the idea from the greatest scientist of all time Professor Farnsworth !
This awkward moment right there.
"This is more fucked up than Lord of the Flies" - Tasteless/Zyrkhan <-LoL/♞
Paraclete United States. September 13 2011 09:08. Posts 96
I remember doing a school project on Gliese 581 g when this whole exoplanet thing started. I'm really excited about this and I'm glad they've kept exploring . Now all we need is a way to travel 20 light years in a lifetime .
acgFork 208
DyEnasTy United States. September 13 2011 09:18. Posts 3437
On September 13 2011 06:35 DyEnasTy wrote: Wouldnt it be hazardous for humans to live on a planet that has 3.6x earths gravity?
3.6x Earth mass does not mean 3.6x Earth gravity. That'd only be the case if that 3.6x Earth's mass were packed into a sphere the SAME size as Earth. It's likely that this planet is larger in raidus than Earth because of the larger mass, so gravity will be somewhere between 1x and 3.6x, depending on density and composition.
No, 3.6 Earth masses means 3.6 times Earth's gravity. As long as you are outside of a spherical mass, you can model its gravitational effect on you as if it were a point mass. This is assuming that both bodies are not small in relation to the magnitude of the gravity involved, else tidal forces to come into play.
Edit: And people would probably not be able to deal with 3.6 gravities constantly pulling the blood out of their brains and into their feet. You would have to spend years working up to the ability to withstand that with any kind of consistency, I imagine. Maybe the first colony ship will be one of those that rotates to simulate gravity, and the inhabitants will spend the entire trip gradually dialing up the spin speed over the course of however many hundreds of years it would take to get there. That ought to do the trick.
And only physically fit people could even set foot on the planet. What about, children, babies, elderly, infirm?
Much better to die an awesome Terran than to live as a magic wielding fairy or a mindless sac of biological goop. -Manifesto7
hotbreakfest United States. September 13 2011 09:19. Posts 145
Currently we can see up to 42 billion light years into space. We are an insignificant speck dust on a speck of dust on a speck of dust on a speck of dust on a grain of sand in the Sahara Desert. I think that says just about enough.
Last edit: 2011-09-13 09:21:01
DBOWNIZZ United States. September 13 2011 09:24. Posts 66
On September 13 2011 06:35 DyEnasTy wrote: Wouldnt it be hazardous for humans to live on a planet that has 3.6x earths gravity?
3.6x Earth mass does not mean 3.6x Earth gravity. That'd only be the case if that 3.6x Earth's mass were packed into a sphere the SAME size as Earth. It's likely that this planet is larger in raidus than Earth because of the larger mass, so gravity will be somewhere between 1x and 3.6x, depending on density and composition.
No, 3.6 Earth masses means 3.6 times Earth's gravity. As long as you are outside of a spherical mass, you can model its gravitational effect on you as if it were a point mass. This is assuming that both bodies are not small in relation to the magnitude of the gravity involved, else tidal forces to come into play.
Edit: And people would probably not be able to deal with 3.6 gravities constantly pulling the blood out of their brains and into their feet. You would have to spend years working up to the ability to withstand that with any kind of consistency, I imagine. Maybe the first colony ship will be one of those that rotates to simulate gravity, and the inhabitants will spend the entire trip gradually dialing up the spin speed over the course of however many hundreds of years it would take to get there. That ought to do the trick.
And only physically fit people could even set foot on the planet. What about, children, babies, elderly, infirm?
And that's where adaptation comes in. Plus I don't think anyone is assuming there human's just like us living there. (even if there if life there)Who knows there could be some alien race that can withstand those type of environment's we just don't know.
Edit: Unless someone was talking about from moving from Earth to there....Then yea that would be impossible.
Last edit: 2011-09-13 09:25:43
" Aaaannnd see you next time"
AKomrade United States. September 13 2011 09:28. Posts 572
On September 13 2011 06:35 DyEnasTy wrote: Wouldnt it be hazardous for humans to live on a planet that has 3.6x earths gravity?
3.6x Earth mass does not mean 3.6x Earth gravity. That'd only be the case if that 3.6x Earth's mass were packed into a sphere the SAME size as Earth. It's likely that this planet is larger in raidus than Earth because of the larger mass, so gravity will be somewhere between 1x and 3.6x, depending on density and composition.
No, 3.6 Earth masses means 3.6 times Earth's gravity. As long as you are outside of a spherical mass, you can model its gravitational effect on you as if it were a point mass. This is assuming that both bodies are not small in relation to the magnitude of the gravity involved, else tidal forces to come into play.
Edit: And people would probably not be able to deal with 3.6 gravities constantly pulling the blood out of their brains and into their feet. You would have to spend years working up to the ability to withstand that with any kind of consistency, I imagine. Maybe the first colony ship will be one of those that rotates to simulate gravity, and the inhabitants will spend the entire trip gradually dialing up the spin speed over the course of however many hundreds of years it would take to get there. That ought to do the trick.
And only physically fit people could even set foot on the planet. What about, children, babies, elderly, infirm?
brave efforts. they will be remembered for their attempts.
Last edit: 2011-09-13 09:36:31
I used to spend my time not caring about people's language in chat. Until I got hit by blizz. Now I spend my time instigating people to verbal abusive levels, so I can ban them in turn. The circle of life.
nemY United States. September 13 2011 09:38. Posts 3117
sadly, though exciting, even the most generous estimates (using the Drake equation or similar) don't give hope for two intergalactic civilizations to exist in the a time-period close enough for them to interact.
At our best estimates, life is so extremely rare in the universe, that we will likely never (certainly not our generation but probably not even humans) see another intelligent sophisticated race.
Sci-fi has ruined us! (although secretly I still hope that some sort of physics-bending science will come about that allows FTL travel and exploration! )
"You have to remember something: Everybody pities the weak; jealousy you have to earn." Arnold Schwarzenegger
"you know all that money that we spend on nuclear weapons and defence each year? trillions of dollars. INSTEAD if we spend that money feeding and clothing the poor of the world, and it would pay for it many times over, we could as ONE race, explore outer space together, in peace, forever"
------GUNSHOT------DEAth!!!!
hotbreakfest United States. September 13 2011 11:34. Posts 145
On September 13 2011 08:37 FeyFey wrote: we just move the whole universe not the ship. That way we don't have to make the ship move faster then the light.
I like this man's plan.
Not a man ;( a girl ! But i stole the idea from the greatest scientist of all time Professor Farnsworth !
Awkward.........
haha
"IF WHAT YOU DO NOT KNOW IS MORE THAN WHAT YOU HAVE KNOWN. THEN YOU HAVE NOT KNOWN ANYTHINIG YET." - Rev Kojo Smith
sheaRZerg United States. September 13 2011 12:55. Posts 518
Adding to the surface gravity discussion...so scaling radius as well:
You can start with the mass M goes as r^3. So r ~ M ^ (1/3) . Plugging that into F = mg = GMm/r^2. Gives you the surface acceleration as M^(1/3). So for constant densities this the new surface gravitational acceleration is (3.6)^(1/3) = 1.2 g. Not bad at all ^^.
It should be noted that this is not necessarily the whole story. For one thing rocky materials become more compressed with additional pressure. For instance materials of identical composition at the Earth's center are more dense than those at the center of Mars. This would effectively decrease the radius and increase the surface gravity for a given mass.
Alternatively...we do not, in general, know the relative abundance of lighter silicate (think rock) material to the denser metallic iron in any given planet found with this identification technique (note that this is different from the technique used by the KEPLER mission, which yields good predictions of radius and not mass). The Earth, Moon and Mars all have similar ratios of these two materials (which might be expected seeing that they formed from the same disk of material orbiting the sun. Mercury has a greater proportion of the heavier iron, for reasons that are not well understood. We have no reason to necessarily believe this would be a similar ratio in other solar systems, and this unknown could push the surface gravity in either direction.
So I guess what I am saying is big error-bars, but probably not too uncomfurtable as far as super-gravity is concerned ^^.
These are indeed exciting times. I dont hear too much about other missions, but I know the KEPLER mission has 1000s of "planetary candidates", many within in the Earth to super-earth size range.
"Dude, just don't listen to what I say; listen to what I mean." -Sean Plott
Store
WCS
SC2Links Mobile App …
Professor Farnsworth !
Truedot September 13 2011 09:33. Posts 444
