measure of starshine,    come on please help me out its greatly appreiciated?
919794
Brightness as seen on earth is called Magnitude.\nBrightness as would be seen from orbit around star is called Luminosity.
575986
is five * ten to the power sixty one.  can u believe i actually counted it.. oh my eyes are paining
201708
Several different ways depending on the distances involved.\n\nFor close stars, we look at where the star appears to be in the sky at times about half a year apart. Think of looking at your outstretched thumb through your left eye, and then your right eye. The thumb appears to be in a different position with respect to a distant building. In the same way, a star will appear to be in a slightly different position when we look at it from different ends of the earth's orbit. The amount of shift depends on the distance to the star and that allows us to figure out the distance. This method is called paralax.\n\nFor slightly more distant stars, we look at clusters of stars and measure their apparent motion across the sky over a course of *years*. Just as train tracks appear to converge at the horizon, the motions of the star will appear to converge. The rate of convergence is related to how far away the cluster is.\n\nWith these methods, we get enough stars to do statistical analyses of the brightness of the stars versus their chemical composition and other aspects of their spectrum. With this knowledge, we can estimate the distances to further stars by just comparing their spectrum to that of already measured stars. Scientific models of stars are used at this stage.\n\nFarther away than this, we look for 'standard candles', that is, stars of known brightness. By comparing the brightness they appear to be versus their actual brightness, we can estimate their distances. A particular type of 'standard candles' are the Cepheid variables. Their actual brightness depends on how fast they vibrate. Since we can see these stars in other galaxies, we can use them to determine the distances to those galaxies.\n\nFinally, after we know the ditances to some galaxies, we can measure the rate at which they move apart as a function of distance. By measure red-shift (hence speed) of more distant galaxies, we can determine their distances.
1142316
Write it up and send it to a physics journal. You'd get credit for your discovery if it is valid. If it isn't, they'll let you know.
166203
check www.space.com or go http://nightskymag.com/
1151942
Metric system?????\n\nWe BARELY know the system we're using now!!! Anyone who knows their Multiplication Table is considered a Mathematical GENIUS!!!
188805
How many stars are there in the sky?\n\nSeriously, I don't know if there's a number you could get that would be accurate.  Between banks, credit unions, grocery stores (mine actually has its own), plus the countless independently-owned ATM's at gas stations and convenience stores, you are deep into the millions for sure.
364385
Stars are not scattered randomly through space, they are gathered together into vast groups known as galaxies. The Sun belongs to a galaxy called the Milky Way. Astronomers estimate there are about 100 thousand million stars in the Milky Way alone. Outside that, there are millions upon millions of other galaxies also!  \n \n  \n \n \n Hipparcos mapped millions of stars in our galaxy, but how many more are there? \nIt has been said that counting the stars in the Universe is like trying to count the number of sand grains on a beach on Earth. We might do that by measuring the surface area of the beach, and determining the average depth of the sand layer. \n\nIf we count the number of grains in a small representative volume of sand, by multiplication we can estimate the number of grains on the whole beach. \n\nFor the Universe, the galaxies are our small representative volumes, and there are something like 1011 to 1012 stars in our galaxy, and there are perhaps something like 1011 or 1012 galaxies. \n\nWith this simple calculation you get something like 1022 to 1024 stars in the Universe. This is only a rough number, as obviously not all galaxies are the same, just like on a beach the depth of sand will not be the same in different places. \n\nNo one would try to count stars individually, instead we measure integrated quantitites like the number and luminosity of galaxies. ESA's infrared space observatory Herschel, to be launched in 2007, will make an important contribution by 'counting' galaxies in the infrared, and measuring their luminosity in this range - something never before attempted.
148361
Size of Star depends on how it was formed originally. I don't think it could be said precisely. U can take the size of our sun as a measure. Radies=6400kms
662250
The number I usually see quoted is 4000, but checking with Google.....\n\nFrom my suburban location, without optical aid, I can see down to about magnitude 5 on a really good night around 2am when there's little traffic and stores are closed.  That's about 2822 (actually less, since  I never see some southern hemisphere stars).  In my binoculars, I see down to magnitude 8, or 77,627 stars.\n\nNow, out in the country, a person with good eyes on a dark clear night can see down to magnitude 6, which is 8768 stars total.   A person with a 6-inch refractor telescope can see down to about magnitude 13, which gives 15,431,076 stars.\n\nOn the other hand, I read a book by an astronomer who said he could see down to magnitude 8 on top of Mauna Kea breathing oxygen from a tank.  That's 77,627 stars with no optical aid.\n\nNow-- for stars seen and unseen, there are about 400 billion stars in our galaxy.  \n\nIn the known universe?  The CNN story linked below says 70 sextillion.  That's 7 with 22 zeros.\n\nIn the whole universe, known and unknown?  Nobody knows--we do not even know if the universe is finite or infinite.  The number could be "infinity".
305459
I believe this was filed under the wrong category.  This is the astronomy section- not the astrology section.  Astronomy is science.  Astrology is nonsense.
441685
Thats one of the funniest questions I've ever heard, and definately a first.\n\nRatio...lol \n\nEven if someone could give you an accurate number it would be too large a number on the star side to even begin to comprehend, and too small a number on the freckle side to even be able to comprehend.  No one knows the exact number of stars, or even galaxies that contain them.
1163228
...Junyong, you sure seem to have a habit of passing all your homework assignment onto us - hoping that we will do it all for you, so that you can simply copy and paste it directly into your worksheets ! \nYou MUST learn to do your homework by yourself, dear - because others will not be around to help you in your final examinations, and you will also be having no first-hand knowledge of what can be found where !\n'Science fiction' is a highly technical field, and the current market rates for even the shortest (but technically correct) piece are around US $ 500/- ! Nobody is going to bother write one for you - in return for the points they get !\n...I'll give you some tips, though : Geology is the science that deals with the history of the earth as recorded in rocks. So, you could write a tale about a rare piece of rock that a child accidentally finds in their garden - which has an unusual gleam. The child's parents think it must be a semi-precious stone - and take it to be evaluated by a jeweller. He tests it, looks shocked, and secretly phones up the Space Research people. They come, examine it, and look even more shocked : The secret is finally revealed - that it is NOT from our Earth at all - but a unique specimen that must have come from a meteor [speedily flying fragment of rock, which has broken off from some other planet !]. \n...Since they already have samples from the Moon and Mars, the scientists feel certain that this stone is NOT from either - as its constituents are different. \n...Then where is it from ? And how did it fall into the garden of this child's home ? Have any other such pieces been found, or reported ?    \n....The answer comes from the least expected source !....\n...I've given you the outline. Now, be a dear, write the story in your own words, and give it a surprising ENDING - to show how clever and imaginative you really are. \n[On purpose, I've not ended the story !]\n...Best of Luck, dear.
451792
We don't yet have any reliable measurement. One widely held assumption is that it is the same as \n.. Doh! .. I can't say that.
1072523
read these:\nhttp://map.gsfc.nasa.gov/m_uni.html\nhttp://www.astro.ucla.edu/~wright/cosmo_01.htm
3680
Well it is supposed to be a constant that characterizes the rate of expansion of the universe.  Theoretically, it should be a constant, but there has been quite a bit of debate as to what the actual value should be.  It ranges between 50 and 100 depending on how you approach measuring it.\n\nThe means of measuring it vary greatly, thus it can be difficult to get a real apples to apples comparison and sort out who has the more accurate result.
910482
I do not know since I haven't read the book. But I have come across a web page that explains the numbers as such:\n\nThe first number is Ν (nu), and it is huge. It measures the strength of the electrical forces that hold atoms together, divided by the force of gravity between them.\n\nAnother number is Ε (epsilon), whose value is 0.007. This defines how firmly atomic nuclei bind together and how all the atoms on earth were made.\n\nThe cosmic number Ω (omega) measures the amount of material in our universe. \n\nThe next number is the cosmological constant, Λ (lambda), which measures the cosmic repulsion. Our existence requires that Λ should not have been too large.\n\nHow tightly stars and galaxies are held together can be expressed as a ratio between the force of gravity and the amount of energy needed to disperse them. This ratio is the fifth number, Q (Q, of course).\n\nThe sixth number is the number of spatial dimensions in our world, Δ (delta).\n\nHope this helps.