Celestia Forums

Sorry for my bad sentence, it was a comparison with the earth tectonic, which is something really amazing when you think about it. Too bad it was misunderstood, and taken for pseudoscience. But I find Fridger's reaction lacking moderation for what it is only an english phrase from someone who isn't ...

Like Earth... only 30% of the surface is resilient. the others 70% are oceanic floor and are also renewed every hundred millions years...

Nice, but...

Aren't mirrors supposed to open and close simultaneously ? because in that video, I think you are destabilizing the station.

I may be wrong, but isn't the coriolis force enough to destroy the mirrors ?

* The gas giant would be blue with white water clouds. Why? Because of that : Heracles, the gas giant, orbits at a distance of just over one AU from its sun. the subject have already been discussed if I remember, and jovian planets at such a distance of a sun-like star would have this appearance. B...

With a jovian planet in Mars' orbit, I said good luck for our Earth...

Our planet would be only a second (or first because of the distance to the sun) asteroid belt

The spaceship "Alexei Leonov" in 2010 : Odyssey II was based on the same concept of John Dollan's freight ship. It may have a system for counterbalancing the rotation on the arms...

Sorry guys, but imha, earth wasn't like that after the KT impact. If oceans were vaporized by this impact, nothing larger than bacteriae would have survived...

If you were to shoot a projectile at a higher fire velocity, you would more likely hit the target if it is say, moving, then you would with a slower fire velocity because it would get to the target quicker. Indeed, some guns can fire supersonic projectile (the french FAMAS I think, and others that ...

Bloody european decimal point ! You have the point, now it works !

Thanks bdm !

I don't understand... # Generated with Asteroid Maker Version 1,1 on YYYY-10-DD 12:46:42. ############################################## #VALEUR! "Asteroid 1" "Lam Ser" { Class "asteroid" Texture "golevka.*" Color [ 0.001 0.001 0.001 ] # No mesh Radius 3.01 EllipticalOrbit { Period 000.000000000002 ...

It doesn't work on my Excel 2002... There is errors in formulas of k1, k2, k3 and k4, and I don't understand anything in theses sheets...

My Favourite spaceship in sci-fi, the USSS Discovery I, famous for the US mission Jupiter 1999-2001 and the US-USSR Mission Jupiter 2010-2015...

Indeed, human life will be impossible on Earth before sun become a red giant... The temperatures will rise during the next billion of years, overheating exposed sediments, so the cycle of carbon will be stopped, and every life on earth will die because of lack of CO2... Funny isn't it, in this perio...

Uh ? Mars as big as the full moon ? Mars WAS closer than it had been in centuries last year if i'm not wrong. And even when Mars is very close in opposition with earth (when earth is between Mars and the sun) there is always 60 millions km... That's more than 150 times the distance between Earth and...

I prefer the fact that private societies develop a space program rather than giant national space agencies with no program at all... Maybe I'm cynic, but NASA, ESA and others don't make me dream anymore... There is only abandonned projects... I think that space is the next frontier for humanbeings, ...

Argh... What a headache ! Negative mass, kinetic energy without mass... But what about the theory of particles with negative energy, like tachyons, which in theory decelerate to the speed of light when they gain energy ? (non please, don't hit me on the head) I know it's not the subject, but this th...

Dark side isn't for this lacking-of-culture journalist the hidden side of the moon ?

If you're the passenger of such a space ship, the answer is yes, for you, the distance between you and the star seems to shrink when you approach the speed of light, so the journey seems to be shorter. If my memory is not confused, for exemple, at 87% of speed of light, distance seemed halved and ti...

I'm not sure to understand... You want to imagine what would life if humans lived on a terraformed Venus ? If Venus is terraformed, life would be the same that life on earth, no ? But if you think "terraformation" with only the problem of the very thick atmospher, that's another thing, because of th...

Yep, radiations are the main problem with earth-like moons orbiting around jupiter-like planets... However, the moon could have its own magnetic field who minimize the radiations from the giant. And a thick atmospher might help too... But these conditions makes such a planet very doubtful, and if li...