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Tiger, so there are just random elements flying around the stars? Are there any elements that seem to be in every star and others that never appear? ~Kitty

Tiger, what do you mean specifically when you say 'highly ionized atomic nuclei'? ~Kitty

Its probably me that's wrong. So in the star are there just free roaming particles flying around decaying as they go? What happens when they can't decay anymore? ~Kitty

So if we can't get the emission or absorption lines for a spectrum how do we know what elements are present in that star? ~Kitty

Whoa. :bugeye: Why so small and so dense?! Are there any figures for estimating the gravitation of a neutron star? ~Kitty

Thanks for the links Astronuc. I'm here to learn and that's why I asked. :smile: ~Kitty

Tony, what do you mean "10th planet resonates with Neptune"? How does a planet resonate? I've never heard that. Not doubting you, but I've just never heard of it before. ~Kitty

Astronuc, I'm rather unfamiliar with these things (simply because I haven't learned them yet) but if a neutron were to decay what would it become? ~Kitty

It seems uncharacteristic for a star to orbit another star. I would have thought the planet would follow a figure eight pattern around all three stars. The orbit would be massive if that were the case. ~Kitty

That does make sense. How much bigger would this telescope need to be theoretically if we were to send out beyond our solar system? This is going to sound like a stupid question but doens't the Hubble already travel outside our solar system? ~Kitty

That is very strange. So does the planet orbit all three planets at once?

It doesn't have to have a point. I was just wondering if there was one.:smile:

What does all this really mean? ~Kitty

I'm having a hard time picturing that. Previous post make it sound as though the planet is in the middle of the three stars orbiting its suns. That however is unlike any kind of orbit, so its three stars are in the middle and the planet is orbiting them. Why didn't the three stars merge to...

That would be an awesome project. Would the telescope necessarily have to be bigger though? With the way technology is rapidly advancing, I don't see how we would need to make a larger telescope to go out beyond our planets. Wouldn't it be possible, and potentially less expensive, to use smaller...

Pocketwatch, I think it might be good for you to read up a little bit on black holes. This site:http://en.wikipedia.org/wiki/Black_holes provides good information about the formation and structure and size and other subjects pertaining to black hole. You question was good, but I think this might...

The last post was meant for Pocket, not Janus. :blush:

What do you base this obsevation on? Merely the photos of swirling galaxies? ~Kitty

What is the point of having the Kozai Mechanism if it doesn't do anything but cause satilies to crash into their orbiting body after achieving an orbit of 90 degrees?

That is insane. Do we know what the most extreme angle of orbit is so far? Is there a general angle that most satilites follow? Do any moons orbit their planet in a counterclockwise motion? Why?

What do you mean it can alter their orbits up to 90 degrees? Some planets will orbit their suns perpendicluar to the other orbits?

Whoa! There's a few phrases people are tossing out here and I have NO clue what they mean. :bugeye: Could someone please explain what these are?: Exo-solar system Binaries/wide binaries Kozai Mechanism I briefly skimmed the article Pervect posted with the picture of the Oort cloud and...

Ah! YAY the brain does work during summer holiday! :biggrin: You got it. I wasn't sure how best to articulate my thought so I took a a stab at it and hoped someone might get it. :smile: So yes, why are all the planets on one plane with one orbit, but the electrons of an atom are flying...

Is there a way to measure how big or small a galaxy is compared to ours? What is the smallest galaxy we know of?

I know how this is. :grumpy: Believe me I have lost a few posts myself because of a sketchy internet connection. I hope your connection this time is more stable. :smile: Your post answering my question makes sense. Just to make sure I have it, it's not so much we are on one of the foci of...

Pervect, the answer you gave make sense to me. Panthera, the solar system resting on one foci of an ellipse rather than the center of a circle fits. If we are at one foci of the ellipse, then what is one the other? Why don't our planets orbit the sun the way an electron would a nucleus...

How much force do the other planets have on one another? Do the satelites that orbit the planets also have a small effect on the path of the planet?

Hello everyone, Its good to FINALLY be back! :biggrin: I was wondering why the path of the planets in our solar system is elliptical and not circular? ~Kitty

Can I ask what axions are?

So basically what you are saying, Tiger, is that there is credible evidence to support the theory of dark matter. Right?

That is awesome. Interesting to think the universe behaved like a liquid. I wonder why it did that. I wonder if we still see the universe behave in this manner to a degree.

I guess I ahve it twice as bad then. I like particle and the physics involved and I'm a NASCAR fan. :biggrin: Why launch the particle at gold specifically?

Whoa, Kolya. That's a big asperation.

Strong evidence in this case seems to be the best they can get. This is going to sound ignorant; is there any point to a balck hole or is it just there?

Alright. I can see that.

Lot's of details is an understatement dear. :smile: Kitty

This is all theory right? Or does this actually have experimental proof?

Chronos, do you believe it might be possible to one day travel inside a black hole and discover what is inside it?

Approximately how many of these stars exsist within our galaxy? Do they ever entirely burn out? What happens to their matter afterwards? Do stars ever become cold? I know there are some stars that are colder than others; red to blue to white; but are there any stars that burn coldly. I don't...

Karoly, First, welcome to PF! :smile: We are glad to have you here. Now, what you have posted does not sound ridiculous. In fact, we were just discussing the topic of universal expansion a few days ago. You might want to search for the threads entitled: Universal Expansion and Heat Death...

So does it just disappear once the outer layers are completely shed?

If anything were to exceed c wouldn't it just turn into energy?

Is a planetary nebula like a supernova, but smaller?

He, or she, could use the Hitchhiker's Guide to the Universe. :wink: I agree with Ohwilleke, anybody who wouldn't bring a bloody map with them is daft. SpaceTiger does have a point in stating current physics points out no such machine is possible.

Monique, I have to agree it is strange that they were not allowed to land in Canada. I would have thought the pilots would have landed in the closest airport and would have had the passengers in question removed as quickly as possible and then resumed the original flight plan.

How do scientists define the entropy of a fluid of photons? How do you have a 'fluid of photons'? I thought photons were just particles of light traveling as an EM wave.

Thanks Nereid. Your explanation made sense. Yay for comprehension! :biggrin: How long does it take the average start to go supernova? How long does it take the average Wolf-Rayet star? Do these stars behave just like all the other kinds of stars? How hot is the space between these stars and...

Chrono has a point with the birth place of the Big Bang. It would be like blowing up a balloon really big, tieing it off, and then having you locate the centre inside the balloon. The aging slower concept you mentioned is intriguing. I have never thought of that before. :rolleyes:

Very curved would be an understatement! :shocked:

:bugeye: Cool. That fourth dimension would be time. Right?