As the great astronomer Carl Sagan once said..... billions and billions
2007-01-24 12:05:51
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answer #1
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answered by ? 6
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We estimate about 200 Billion stars in our galaxy (which is average sized) and we can see from 100-125 billion galaxies. Take note that this is ONLY what we can see, there are more out there, we cannot as yet see to the edge of the universe.
Multiplication yields roughly 20 Sextillion stars in the VISIBLE universe. That is a 2 followed by 22 zero's.
2007-01-24 11:26:14
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answer #2
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answered by David W 3
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no longer precisely. They make me think of. case in point, is there a planet going around greater than a number of of those stars and are there people on that planet looking up on the celebrities of their sky?
2016-11-27 00:02:05
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answer #3
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answered by ? 4
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more than you can imagine, which is trillions more than you can see with the naked eye.
The colours of the stars are indications of their surface temperatures.
Reddish stars such as Antares are about 3,000 degrees C. Generally these stars are giant reds which are very old and have burned up most of their hydrogen. Young stars such as Vega are a bluish-white colour and burn at about 11,000 degrees C. Medium aged stars, such as our sun, can be orange, yellow or white and burn at imtermediate temperatures between the two extremes.
From the surface of the earth the stars appear to lie on the inside of a spherical surface. We get no feel of actual distance to the stars by looking at them. Magnitude (brightness) is not an indicator of distance as this varies according to the size, composition and age of each star. In fact faint stars are more common among our nearer stars.
Stars are subdivided into magnitude according to apparent brightness. The lower the number the brighter the star. Any star is about 2.5 times as bright as one of the next magnitude. Normally the faintest star visible to the naked eye is of the 6th magnitude - just 1/100th of the brightness of 1st magnitude - but this is possible only under a very clear sky.
Assuming that you do not have any light polution near to you, on a moonless night the total number of stars so visible in the Northern Hemisphere is about 1,000.
Zero magnitude (0.0) represents a brightness 2.5 times that of a 1st magnitude star. Brightness in excess of this are indicated by a minus sign - the magnitude of Sirius for example is -1.47. At its brightest Venus is -4.6 which is 145 times as bright as a 1st magnitude star. The magnitude of the full moon is -12.5 equal to 250,000 times 1st magnitude. The stellar magnitude of the sun is -26.6 equal to 444,000 full moons.
2007-01-24 11:18:31
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answer #4
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answered by DAVID C 6
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Sientests estamated that their are about 70 sextillion stars in the univeres,yes its a number
2007-01-24 11:23:11
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answer #5
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answered by lutyel 1
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Too many to even guess, a number approaching infinity...
2007-01-24 11:17:59
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answer #6
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answered by deangowarrior 2
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Unknown amount.
2007-01-24 11:21:15
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answer #7
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answered by rebel_gurl002 4
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At least three.
2007-01-24 11:21:30
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answer #8
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answered by Anonymous
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my prediction is over a billion...but the world may NEVER know!!!
~Jeeenz~
2007-01-24 11:18:08
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answer #9
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answered by Jeeenz 1
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trillions upon trillions
2007-01-24 11:17:30
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answer #10
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answered by steven m 7
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