Astronomy and Cosmology

Experts believe the chaos cloud is composed of particles spawned near the event horizon of a black hole (a form of what's called Hawking Radiation) that have been distorted by mangled information spewed from the hole. does anybody else know anything about these chaos clouds? facinating concept but yet again is it proven?

if i say moon is not rotating in its own axis,is there any body to oppose me??? with explanation of synchronous rotation. if a car is moving along a circular path,and you are standing at the centere of this circle. Do you say the car is rotating on its own axis?? of course everybody will agree that it is making a revolution around u.but no body will say it is rotating in its own axis. during this revolution u can see only one side of the car,is it true in the case of moon also ? or am i wrong????

Is there anything in the universe that is not revolving around something? Is the universe expanding or shrinking? Where is the center then? Is space itself something, or is it truely nothing? Like when we go to outer space are we traveling in something or is it nothing at all?

Is the center of the galaxy a black hole?

according to eniestien,matter bends space..so what woud happen if you put more and more stars to it...it will cuve and curve untill...untill it encloses it self....i.e.universe has a shape of a sort of sphere....you will run out of new places to see but you will never find a end...that's what i think..pls correct me if i am wrong....

Can there be a black hole that is so massive that its gravitational force can pull an object faster than light?

Hey guys, I thought i'd broadcast the news to ya about the London Eclipse that happened at Approx. 5:44 p.m. EST. "LONDON - The moon darkened, reddened, and turned shades of gray and orange Saturday night during the first total lunar eclipse in nearly three years, thrilling stargazers and astronomers around the world. The Earth’s shadow took over six hours to crawl across the moon’s surface, eating it into a crescent shape before engulfing it completely in a spectacle at least partly visible on every continent. About a dozen amateur astronomers braved the cold and mud outside the Croydon Observatory in southeast London to watch the start of the eclipse. “I…

yesterday i sat for goegraphy class, there was something like great bear, north star, constellation of 7 stars, i could not understand all this stuff, anyone plz has answer of querry??

Ned Wright has provided us with a "best fit" value of Omega = 1.011 George Smoot has some undergrad coursenotes where he shows how to derive the radius of curvature from Omega. Essentially you take sqrt(Omega - 1) and divide the Hubble distance by that. Omega - 1 = 0.011 and the sqrt of that is 0.105 which is about a TENTH And the Hubble distance, c/H, is about 13 billion LY. So you divide that by a tenth, and you get 130 billion LY. actually it is 13.8 divided by 0.105, but it comes out the same ============ Wright and Smoot are colleagues, they worked together on COBE (where Smoot was a leader) and now Wright is leading WMAP, which is the fo…

Just how big is the universe anyway??? I know that there won't be exact figures available for some time, but what is the estimate of the size of the Universe? I know that it has to be bigger than what can be observed through Earth's sky.

Hey. I'm thinking about doing a speech on Black holes for a Graded Assessment in School. Can anyone give me some useful information on Super Black Holes, How Black Holes are Formed etc? Thanks.. Ben

how sceintists of 17-18th centuary measured the speed of light????they cannot do it by distance/time as then by the time they have measured 1s light would travel far ahead of them to mesure(300000km)..and they didn't have eqipments to measure 1/100000th of second that time..even if they did ,by the time they mesured it,it should move ahead.....so how did they managed to do it.. ???????? :confused: :confused: pls help me out .....

I've been told by someone on another forum that scientists measure the speed on the Earth by comparison to the background microwave radiation. I asked how one finds a "fixed point" in the BMR and the reply was that we measure its red shift. How credible is my source? Does this make sense?

Lately I've been reading about the formation of the solar system and so many questions presented themselves! Here's one: how come Mars is so small? Common sense tells me that the further from the Sun, the larger a planet can be. Please tell me if my intuition is right! Yet Mars is a lot smaller than Earth. One possible explanation I came across has to do with Jupiter. I read that the presence of Jupiter probably inhibited the formation of a planet in the asteroid belt: if a planet would have formed there, Jupiter's gravity would have pulled it out of its orbit. Would the same have been the case if Mars had grown somewhat larger? Another thing I don't understand i…

My friends vacations are approaching... He is a great lover of this science... He wants to see the sky using a telescope. Where can I find one... and his budget is approx. $50 . What will be the best option and where can we buy one. Any website?

Can anyone give me any information about dark matter and energy? I've got a project that I'm working on about it, and if I'm good enough, I get to discuss it with professors at a university. Chapel Hill if I'm not mistaken.

pls tell me something about schwarzschild radius????i know it's basics but what is the formula for finding it????what is the schwarzschild radius of earth????

for last two days,i am reading the posts in this forums..but the more i read,the more i get confused....can someone pls tell me about what exactly is the structure of universe?????how was it created and how will it get destroyed??????how did the scientists figured it out????is there any proof of the modern model of universe????what are black holes,worm holes and singularity????pls help me as i am getting severe headache boz of this...... :confused: :confused: :confused:

http://www.sciam.com/article.cfm?chanID=sa003&articleID=CC0885E4-E7F2-99DF-3F9286C5AEB3C58F O_O

Hey Guys, Awhile ago, My class was studying a little on space. They werent the most satisfying lessons but they did well, We were all learning about how light travelling through the Atmosphere and around the earth. My science teacher said "Light needs particles/Something to travel through", This does not describe how light travels through space. Correct me if i am wrong but i though Space was a 'Vaccum', My teacher said there is no particles present... So how does light travel from the sun to the Atmosphere and so on? Thanks.. Ben.

This post describes a computer experiment that could be carried out and that could produce a more accurate value for the age (or radius) of the universe than the currently estimated 13.7 billion years (or 13.7 billion light years). It refers to the post of 14 Feb 07 in the Speculations Forum, but the current post considers only factual material and realizable experiments. 1. Computer experiments which used an approximate entropy metric for randomness have shown that the digits of √2 are more random than the digits of e. This result is “mainstream” and has been reported in a leading peer-reviewed journal: S. Pincus and R. E. Kalman, “Not all (possibly) ‘random’ s…

In a word 'awesome'...please have a look at the BBC article (link below.) http://news.bbc.co.uk/2/hi/science/nature/6235751.stm

like the title said is our sun loosing its mass due to it converting its mass into energy? is this how a star "burns out?"

SCIENCE VS. THE BIG BANG Here are 42 reasons why the Big Bang is foolishness. These are scientific facts which disprove the theory of fog coming out of nothing and pressing itself into stars: 1 - Not squeezable. Nothingness cannot pack itself together. Try packing some fog into a star. Gas in outer space is millions of times more rarefied (thinner) in density than terrestrial fog—yet, billions of times by merest chance, it is supposed to have accomplished the trick.—p. 15. 2 - Not stoppable. There would be no mechanism to push nothingness to a single point, and then stop it there.—p. 15. 3 - Nothing to explode it. There would be no match, no fire to explod…

There is a good writeup in the current Scientific American on dark energy. Simple models do have a flat line of energy density while matter density falls lower. How do we connect zero-point energy here? Quantum mechanics says the ground state energy remains intrinsically in all space, so why doesn't this fill the bill? I say this field is fractionally chaotic, and that disturbances would not be absorbed, only perhaps scattered. Thus a subtle positive pressure.