Astronomy and Cosmology

If space is being created with the expanding universe, can it be destroyed as well.

So I was thinking. Let's say that somehow you made it to the exact center of the earth( supposing that this was actually possible and that you weren't crushed by the pressure and that earth was a perfect sphere.) Would you be "weightless" as there would be nothing pulling you down to earth. Would the gravitational effect of the outer walls of earth stretch you apart? If I'm right than wouldn't you weigh less below a certain altitude ( where the gravity of earth is just before it begins to decrease as you move outward...)

Does the strength of earth's magnetic field increase towards the center/core?

I know, I know. No such thing exists. It's a question. I have to give credit to my friend who put forth this idea, and I'm losing my mind trying to prove him wrong. -- Say we placed a giant iron pole on the Earth. Pretend it was big enough to match the scale shown in the picture. http://img386.imageshack.us/my.php?image=mindnumbingcurvaturend2.jpg What would happen to the pole? The gray lines in the pictures represent the pull of gravity. So, I believe that the pole would be bent to match the curvature of the earth. Now imagine that the same iron pole was placed miles above the Earth, and that the pole was longer than the circumference of the Earth.…

Hi guys. Great place you got here:D I have a question and I would really appreate any help, any! What is the value of azimuth in zenith (in horizontal coordinate system of course)? It's kinda tricky I think. My guess is that it could be any value. I would really appreciate any help. I'm kinda in a hurry.

“The Pioneer anomaly or Pioneer effect is the observed deviation from expectations of the trajectories of various unmanned spacecraft visiting the outer solar system, notably Pioneer 10 and Pioneer 11. Both spacecraft are escaping from the solar system, and are slowing down under the influence of the Sun's gravity.” as described by Wikipedia. Dynamic universe model of cosmology has a natutal explanation to this problem. It shows effectively the acceleration due to gravity of SUN increases towards SUN, approximately beyond Mercury -4.44202E-07 m /sec^2 ; beyond MOON -2.11409E-08 m /sec^2 ; beyond Mars -2.11E-08 m /sec^2 ; beyond Jupiter -2.30844E-05 m /sec^2 ; b…

If a telescope were to FOCUS,as Hubbles would,could that explain the apparent expansion of the universe.......?

if Space is infinite,which is logically consistent,could that explain an over-abundance of Dark Matter?

"The spectrum of energy density fluctuations is scale-invariant (the same amplitude on all scales)." Its context is below and at this link.

Hi there. This is my first post on this site and I was hoping somebody could point me in the right direction. I have a theory on the rotation of the Earth and why it is set in motion perpetually. Ive been discussing it with a few close friends who are open minded and Intellectuals and they think its fairly ground breaking and a totally new way of looking at it. I would really like a reputable source to help me publish my theory (if thats the right thing to do) but I have no idea where to start. The problem is I'm a 23 year old with no professional background in this field. I only have the research and time I have devoted to the study of perpetual motion and astronomy.…

http://www.eso.org/public/outreach/press-rel/pr-2008/phot-46-08.html Images and video of nearly 30 stars whose orbit around the Milky Way black hole was tracked for the past 16 years.

I'm as new to the whole astronomy thing as can be. The only experience I have is a college class I'm taking my sophomore year in high school and I would like, perhaps a bit prematurely, to send something - anything - into space. My plan of action is to use a large weather balloon with a small rocket on top of a small platform atop the balloon. The balloon will go as high as it can, being as it is filled with helium. At the precise moment I plan to launch the rocket into space taking a currently-unnamed something with it. I am obviously over-simplifying this by ALOT, but I am determined to do what it takes to succeed in this task. Unfortunately, I know next to nothi…

hi, i'm currently doing research on cosmic strings and i'm using FITS images to do my analysis. however i would like to add lines into the FITS images that i have so as to simulate these lines as cosmic strings in the images. i'm not sure if there's any software that i can use and allows me to add lines to the FITS images that i have. hopefully someone can enlighten me on that, thanks!

Typical, this is just out of shot from my backgarden, but I managed to have a look through the window via my telescope, though this clearly muddies the view a bit. However, if it's a clear night where you are, have a look outside (towards the moon obviously)... http://www.earthsky.org/radioshows/52786/moon-venus-jupiter-on-december-1

I have a question about the big bang... How fast is everything moving? I've heard somewhere that the universe is 40 billion light-years across. If the universe is only 13.7 billion years old, and the big bang took place in what is now the center of the universe, then shouldn't the universe be less than 27.4 billion light years in diameter, assuming nothing can move faster than light? I thought I knew a lot about astronomy, but this one's confusing to me.

I`v had an idea and wondered if it`s Scientifically sound (or not), it`s a little complicated but I`ll try to explain it as well as I can. 1`st my Premise / assumptions: 1) if you throw a clock into a black hole you`ll see it fall and the seconds hand will appear to be going slower and slower and then eventually stop. 2) this clock will also be red shifted. 3) if we look at the EM spectrum you`ll see that below visible light is IR, then microwave then radio, we have instruments that can detect signals at any of these frequencies also. now assuming the above is correct, I postulate that it Should be possible to use instruments to "Tune in" to the past a…

http://blog.wired.com/wiredscience/2008/11/sugar-molecule.html?npu=1&mbid=yhp They've detected a sugar molecule 26,000 light years away. Cool news for extraterrestrial-life, but how on Earth did they view it? (pun accidental)

Hello, My name is Tom and I am new to this Forum. I am not a physicist but I have an interest in some of the ideas regarding cosmology. I do not pretend to understand all the math and intricacies of cosmic theories. However, I would appreciate any suggestions regarding web sites where a layperson, such as myself, could learn more about worm holes. Thank you Tom C

Out of curiosity IS a black hole literally a hole and there is like a compartment behind it??? And What is behind a black hole considering that the black hole isn't literally a hole?

as some may or may not know, a small but Very expensive toolkit was lost by an astronaut last week, BUT it`s been spotted by an amateur astronomer in Ontario: http://www.ctv.ca/servlet/ArticleNews/story/CTVNews/20081125/tool_bag_081125/20081125?hub=TopStories and the footage: that must be some kinda setup that guy has!

Dear Sir, I wanted to buy the telescope of very good magnification. Can anyone specify the type of telescope which is good. Thanking you,

hello, how many satellites are there for Planet Jupiter.

On November 16th the Leonid meteor shower will peak. It should produce about 15 bright meteorites per hour. Enjoy the show, weather permitting.:-)

I've been on the RSS feed for Universe Today for some time now, but this article in particular caught my eye. Partly because it affects Earth directly, but I found the possible cause of these cosmic rays due to dark matter annihilation more interesting... http://www.universetoday.com/2008/11/19/cosmic-rays-from-mysterious-source-bombarding-earth/ From the article... I realize it's a 'wait and see', to eliminate the latter if such an object is found near our solar system, however although not being an expert on dark matter and how it interacts, I was surprised that this was considered. Are they jumping the gun with putting this explanation for…

The universe is all objects and space. The objects in space move around, but the space can not expand since space does not have shape.