2007-06-17 16:51:39 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
I read that there are more stars in the universe than grains of sand on all the beaches in the world.
We can only see 14 billion light years of the universe but within that area there are 30 billion trillion (3x10²²) stars.
2007-06-17 18:12:44 · answer #1 · answered by Sean 7 · 1⤊ 0⤋
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!
For the Universe, the galaxies are our small representative volumes, and there are something like 10^11 to 10^12 stars in our galaxy, and there are perhaps something like 10^11 or 10^12 galaxies.
With this simple calculation you get something like 10^22 to 10^24 stars in the Universe. This is only a rough number, as obviously not all galaxies are the same.
2007-06-17 17:00:52 · answer #2 · answered by daredevil.1110 1 · 2⤊ 0⤋
No one has really counted the Stars in the Universe one by one. Neither have we counted all the grains of sand in the sea. However to give you an idea of the vasteness of the universe and the galxies in it ; the number of the grains of sand in the sea barely come near the number of stars in the Universe. Based on the primitive calculation of the mass of the Universe the Number of galaxies is speculated at one trillion Galaxies each containing an average of one trillion stars. Note that our concept of the Universe in science is still prehistorically primitve.
The person who says "I dont know is most likely to be correct"
The further a star is ,the less bright it is. In order to see a celestial body as abright spot in the Heavens at very remote distances, it is needed to Cluster one trillion stars into it,other wise it would not be visible to us.
Since Science is not exactly sure of the dimension of the Universe, we have no idea if there exist remote galaxies beyound the Hubble calculated radius of the Universe.
2007-06-18 04:10:05 · answer #3 · answered by goring 6 · 0⤊ 0⤋
A lot.
Modern galaxies tend to be large spirals, like the Milky Way. If there are 200 billion stars in our galaxy, and say there are a billion spiral galaxies, then you're looking at around:
2 followed by 20 zeros. That is 2000 quadrillion stars. That's a lot of real estate. And those are just stars in spiral galaxies we can detect. This could be 5% of the stars in the visible universe.
2007-06-17 18:18:42 · answer #4 · answered by Brain Chemist 1 · 0⤊ 1⤋
The standard guestimates are reasonable if you accept the puny BigBang universe, a mere 13.7 billion light-years across. If the universe is infinite, there are an infinite number of stars with planets just like ours.
2007-06-17 17:51:20 · answer #5 · answered by Anonymous · 2⤊ 0⤋
The latest estimate is there are several hundred billion galaxies, and an average of several hundred billion stars in an average galaxy. In other words, a whole lot!
2007-06-17 16:55:14 · answer #6 · answered by Stephen L 6 · 1⤊ 0⤋
Infinite
2007-06-17 16:54:41 · answer #7 · answered by Singh 2 · 1⤊ 0⤋
nobody knows the exact number of stars,galaxys and etc.
Except for the creator.
2007-06-17 17:10:18 · answer #8 · answered by nexteltom17 4 · 1⤊ 0⤋
almost 10^22 from which 6000 stars u can see with ur naked eyes
2007-06-21 08:42:59 · answer #9 · answered by Ridhima 2 · 0⤊ 0⤋
trillions of trillions, so many you probably can not count it. and more are created every day.
2007-06-17 16:54:28 · answer #10 · answered by TrevaThaKilla 4 · 1⤊ 0⤋