Astronomy and Cosmology

The universe is an anomaly. If time is just one of the several dimensions produced by the big bang, then it must be able to stop much in the same way it started. When I think of the Universe going on forever, I come to the conclusion that infinite instances of us will reoccur in the future. The universe started and may well end, but that would mean the end of time, which has been described as a "byproduct" of existence. In which case, there is no infinity in that direction. I cannot bend my mind around that for this reason: After time stops, a new universe could form. It happened once, why not again? It might not even happen on the same organization o…

I stumbled upon a couple pages about the "Einstein-Rosen bridge" While googleing Time Travel. (You know me ) I read what it was, but I didn't understand it completely. Something about negative square roots, Time travel, white hole, black holes, and other stuff. I would like to know what exactly it is and what everyone thinks about it. PS: I'm not really sure what the Einstein-Rosen bridge is to I hope it's not in the wrong forum. If it is you'll forgive me right

If anyone out there doesn't have NASA-TV and would like to watch the coverage of tomorrow's landing, you can watch a live stream right here: http://nasa-tv.yi.org We're testing some new streaming video technology, and we would greatly appreciate your help in testing it out.

I keep trying to refine this idea. I am just about ready to send it to 20 or 30 professional astronomers and see what they think about it. If you see something particularly stupid here please let me know before they do. Bud When I look at “The Expansion of the Universe”, I see a massive dichotomy. Everyone basically agrees that the universe is expanding and the galaxies are moving away from each other. The farther away they are the faster they are moving apart. Every new astronomy student hears the expanding Universe described as being comparable to a balloon or to a cake with raisins stirred into it. As the cake raises, the raisins move apart. If two r…

putting the universe into terms of a model, consider this; a grenade (the big bang) is suspended on a wire 100 feet in the air and allowed to explode, the schrapnel will fly in all directions like a huge expanding sphere, each peice of metal and explosive spinning in its own direction giving of peices of hot matter in little spirals (a bit like gallaxies) untill eventualy the friction the air causes slows the schrapnel down untill it stops. you`ll get a sphere about 100 foot diameter before the parts loose all momentum. now do the exact same in a 100% perfect Vacuum! (the stuff outside the Universe) you`ll need more than 100 feet of space in fact it will continue…

Apparently as part of the funding shifts to accomodate the moon and mars trips, the Hubble telescope is not going to get any further maintainence. It'll wear out around 2007 or 2008, and be brought down somewhere oceanic by a robotic space craft. Assorted links: http://www.chron.com/cs/CDA/ssistory.mpl/space/2358102 http://www.reuters.co.uk/newsArticle.jhtml?type=scienceNews&storyID=4151142&section=news http://www.nytimes.com/2004/01/17/science/17HUBB.html?ex=1074920400&en=afd98b10efeb0472&ei=5062&partner=GOOGLE

Hi I am a newbie to astronomy and this part of this wonderful forum. What is a good telescope for me to start with. I don;t really want to spen a whole lot but want something to see plantets like Mars and the Moon and the Stars. Thanks

Hi guys, any news on the mars exploration of the Beagle II, Spirit or Oppurtunity? Well, post here! Any news that you have heard, rumours, anything, I need to know. MY newspaper doesn't have lots of info on this sort of stuff, so i thought that it would be best to keep it here! Thanx guys

I'm looking for the following things, for what COULD be considered a school project but truly isn't. Let's say I'm trying to disprove something that I thought up myself that seems too simple to work. Okay, I need the following, simplified down to something that I can hopefully understand. None of this scientific stuff without an explanation, I'm simple-minded sometimes. (*s denote important parts) 1. One pound of thrust can hold something weighing one pound suspended in air if I understand correctly (the equivalent of 9.8m/s/s I think). *If a jet engine were providing one pound of thrust, how fast is the air coming out of it?* (*s denote important parts) 2. Sp…

Let's imagine a planet which has sun and moon whose apparent size is same, just like in Earth. If the lengths of the year, month and day on the planet were same, then the planet would always turn same side to the Sun. Moreover, if the moon was all the time between sun and the planet, then in the center of the light side there would be eternal solar eclipse. The climate of this area would be cold, so it would come some kind of third pole of the planet. Is borning of that kind of planet (same year, month and day) in practice possible. Another question: what kind of combination of year, month and day there should be, that in some area of the planet there would be…

All big planets are spheres, but it's interesting to think what kind of gravity it would occur on the different parts of the surface of other shaped planets. For example cube, cylinder, cone, pancake or torus

Changing of orbits of big celestial bodies is impossible with this millennium's technology, but what about small moons of planets and asteroids. I think that the most interesting idea would be to try drop Martian moons, Phobos and Deimos down to Mars surface. Do you guess this would be succeed. The nuclear bomb is surely the only instrument what could be used. If Phobos and Deimos would fall down to Mars, what influence would this have to Mars climate.

as i am new to this forum hi everyone, i have a question. it seems that SPACE has properties, it can be distorted by gravity,and recently discovered frame dragging,it also has the properties of capacitance, inductance and impedance, if this is correct then discribing space as the" vacuum" cannot be correct so what is it???? cheers.

if gravity is just a 4th dimensional dip in space then a black hole is a massive dip in space right?? we can see them by light bending as it gets near them. but as gravity slows time down and black holes stretch things out would u be stretched for an etternity while you were in there because of how slow time was ticking. however u wouldn't notice this because of relativity and i guess neither would we??

When we talk of escape velocity of an universal object we mean to say of the minimum velocity needed by an object to escape the gravitational attraction of that universal object. right? say for ex. an object from earth must need a minimum velocity of 11km/s. so is this velocity applicable only for objects trying to get away from the earth or is it applicable for objects coming towards the earth. to make it simpler let's imagine of a meteor coming towards the earth at speeds more than E.V .can this meteor able to maintain the same speed till it reaches the earth. (VELOCITY how scientists expain it in this case. i mean is it uni…

How fast is the universe expanding?

I watched Event Horizon (the film) and i like the idea that space/time could be folded. I asked around and about and found that some people believe that there could be universes(i think they said this) that might already be already folded. could anyone put a bit of science behind this. My mind is totally blaged out at the moment, and i need a bit of wisdom on this matter from someone...anyone.

Since a large asteroid smashed into the Yucatan Peninsula during the time of the dinosaurs, is it possible a good chunk of a dinosaur got tossed up into space and is floating around freeze dried? Maybe a large bone full of marrow could have made it up or some water critters. Just aman

If the universe is forever expanding and forever accelerating. Then there would be a point at which the velocity of the expansion of the universe would surpass the speed of light; at that point the arrow of time would be reversed. Would the Universe then retract???

According to the Big Bang Theory, at the time of the big bang, say 10^-99999 seconds after, everything was condensed into a tiny space because the universe had not yet expanded much. But what is keeping all this matter, all the matter in the entire universe, in fact, into its tiny ball? Well, the speed of light according to the Special Theory of Relativity. Nothing can travel at or faster than the speed of light, so all the matter must have been traveling at very close to the speed of light while the universe is expanding at the speed of light. So wouldn't there have been a large gap between all this matter and the edge of the universe, at least compared to the space …

On earth the rate of energy obtained from the sun is c.170000 mega joules. Now, does earth consume any of these energy for its rotation ? Or is it rotating due to sun's gravity and rotational speed?

Hi! I was wondering, Neptune and Pluto's orbits cross over each other. There orbit time and length vary. In millions or even billions of years, won't they collide? At some point, their orbits will catch up to each other and they will be crossing over at the same moment and BANG! Will this do anything? Both are Gas Planets so they might just get their atmospheres and gravitational force screwed up. Just wondering!

I need to know what the distribution of matter in space for a school project if anyone can help me before tomorrow that would be great. Katy

Hey Everyone! I was just wondering where I could get some close up pictures of the Sun. I found some on Google Image Search but... If you have a picture (or even better, a website full of them) please post them! Thanks! Google Image Search: Google Image Search: The Sun

Well, this discussion is probably for Metaphysics, General Science and this forum. Depending on which answers will go on here, but I guess the first logical place is this forum, so here it goes. I have a question that actually quite bothers me for a while now. We all know about the big bang theory - about the "explosion" of the universe that created the stars and planets as we see them today. As I know the theory (i might be wrong here, but this is how i understood things) - our own solar system was made from a smaller explosion of our own sun - creating the rest of the solar system's planets. Now. Explosions are 3 Dimentional. Look at water explosions.. p…