VedekPako

I just lost a relative. My thoughts were not of, "God", but what's best for the relative and what they want. Also, the quality of life afterwards etc.

Thanks. I first got the idea after watching a show about the KT impact; thousands of impacting meteorites (bits of Earth falling back down), though didn't strike the ground, heating up the atmosphere enough to ignite foliage.

I used to love the science and history channels, but they have shows that are just plain uninteresting. What does a Pawn Shop have to do with history?

I was thinking about all these SciFi stories about how massive amounts of shuttles, and or dropships entering the atmosphere in an invasion force; you'd need quite a lot of them, especially if you had deal with a continent's worth of military power. Now, would all those dropships, fighters etc. heat up the atmosphere when they enter? Enough to any invasion would be accompanied by a heat wave?

I doubt any exomoons will be "Habitable" as we know it. There's a lot of radiation in belts around exo-gas giants and most moons will be tidally locked. That means, not magnetic field to protect against the harsh radiation from their parent planet.

What's the maximum height a mountain can be on Earth? Mountain height is a combination of geologic forces reduced by gravity and erosion. No, say we have an early Mars-like world with just enough mass and water to develop plate tectonics, but not enough water to erode the mountains too quickly. How tall can they get? ten miles? thirty miles? etc.

The reason men went to the Moon was more political than scientific. The chances of an asteroid that would cause the human race to go extinct hitting the Earth within our species' lifespan is so remote, any defense system would be a waste of resources*. We probably won't go extinct from an extra-terrestrial source. It will be a a terrestrial source. *Unless it's our species that causes the asteroid to hit the Earth.

It was a book I got from the local library called, Traveler's Guide to Mars or something along that line. It was about Martian geology. It was divided up into three eras and it talked about various geologic formations on Mars. Also, I saw a show on one of the science channels that took all the water off of Earth and put it into a ball and compared it with the size of the Earth. Although water makes a big difference on the surface, it's rather small in comparison with the mass of the Earth. The water was so small, in comparison, that it could have been brought in by cometary impacts and or carried in small amounts in asteroids. I just thought about the Late Heavy Bombardment and how that effected water on Earth and Mars. The movements of Uranus and Neptune that disrupted an Oort cloud would have sent many cometary fragments, mostly water into the Inner Solar System. This could have increased the amount of water on all four worlds and Moon. I supposed we could calculate the amount of impacts on the Moon and estimate the numbers that would have struck Earth and Mars to get an idea how much water was delivered by then.

Yeah, I saw that one. Though, I disagree with it. The early Earth that got hit with the Moon probably had a molten surface. All the water would have been in the atmosphere. I'm just speculating, but the Earth-Moon impact did throw out some of the early atmosphere and water, but some of it would fall back into Earth and it probably had little effect. The accreted solar system probably suffered many impacts that blew of their atmospheres and water. Mars had water. In fact, Mars had more water per ratio than Earth, which could mean that the same number of comets carrying water impacted Mars as they did Earth, since Mars is smaller, it would have more water.

May algebra isn't that good, but I have a problem I would like to solve. If Mars' tectonics lasted only 800 million years and Venus' plate tectonics lasted for about three billion years and Earth's plate tectonics should shut down in about 2 billion years from now, then, I should be able to estimate when plate tectonics ceases on worlds, given their mass to Earth. 0.3 = 0.8 0.4 = A 0.5 = B 0.6 = C 0.7 = D 0.8 = E 0.9 = 3 1.0 = 6 1.1 = F 1.2 = G 1.3 = H Etc. How can I find the values of A though H and beyond? If I know that 0.3 is 0.8 and 1.0 is 6, then I should be able to solve this, but I can't figure it out.

Just how do multiple stars from? Alpha Centauri, for instance. Where they three proto-stellar disks that got caught in their gravitational fields and began to orbit; or, did they form in one proto-stellar disk that had enough mass to form two additional stars?

We're walking on a fallacious minefield here. We first need to figure out if there's another way methane is produced other than biological processes.

It's Star Trek. I don't expect reality. What I do expect is science fiction. Spoiler Alert!!! The one thing that bugged me was when the Romulans went back in time, Romulus, the planet, still existed and the star hadn't gone supernova yet. So, instead of going on a planet destroying spree, why didn't they use that red matter to destroy the star that was going to go supernova? After all, the Romulans have master interstellar travel. They should have been able to put that together. The Emperor would have foreseen that.

"You're blocking my sunlight"

Re: HZ The habitable zone around a M star is small, smaller than the HZ around an F star, so, M stars will have less chance of having a planet in the HZ? True, but, gliese 581 has planets in the HZ, so, does this mean that M class stars are more likely to have planets in the HZ because the smaller the star, the more closely planets will form?

HI. I LIKE YOUR FORUMS VERY INTERESTING. I ALSO LIKE VEDEKPAKO. A MALE ENHANCEMENT SUPPLIMENT GO TO MY SITE TO BUY...just kidding, I'm not a bot. Hi. I'm Vedek Pako. I pulled my screen name from some Star Trek show. The reason I am here is that I am interested in astronomy, paleontology and geology. I don't observe astronomy though a telescope; I theorize about it. Like what, if any, would the planets orbiting Tau Ceti would be like. My educated guess, is Mars-like at best. Me in Owl Canyon. http://i44.tinypic.com/2kkfh0.jpg

That's probably more to do with astronomers only looking at K,G & F stars because they are looking for the holy grail of planet hunting, an Earth-like world. After all the possible K, G & F stars are examined, astronomers will look at M stars and probably find more planets around them than K, G, & F stars.