2007-08-09 16:29:21 · 15 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
How many grains of sand are there on all the beaches on our planet Earth there total may approximate the number of stars in our galaxy. Remember there are stars we cannot even see.
2007-08-09 17:09:52 · answer #1 · answered by Anonymous · 1⤊ 2⤋
We don't know EXACTLY how many, but the estimate runs between 200-400 million.
But, that is just our galaxy, the Milky Way galaxy.
In the Universe, the current, best estimate, is 70 sextillion. (70 with 22 zeros after it), and that's only the ones we can see. The number could be many times that.
Just to be absolutely sure there is no confusion, when it comes to size, this is generally how things are organized:
You, room, house, neighborhood, city, state (province), country, planet, solar system, galaxy, universe.
I'm sure that could be broken down even more, but those are the ones used most often. ;)
2007-08-09 16:38:42 · answer #2 · answered by Steve W 1 · 0⤊ 1⤋
The Milky Way has traditionally been thought to contain 200 billion stars, But these days it is quoted as between 200 and 400 billion stars.
Wikipedia formulates this as:
"The galaxy is estimated to contain 200 billion stars but this number may be as high as 400 billion if small-mass stars predominate."
It is thought to contain about 100 million G-class stars like our Sun.
2007-08-09 16:37:21 · answer #3 · answered by brucebirchall 7 · 3⤊ 1⤋
Last I heard-4 hundred billion in our Milky Way. It is a fairly large galaxy. One of the two big boys in a galaxy cluster of 30. The other big boy being Andromida. The number of stars in the UNIVERSE, (visible universe,) excedes the number of grains of sand on the worlds beaches.
2007-08-09 17:44:49 · answer #4 · answered by Mr. Bodhisattva 6 · 1⤊ 1⤋
And the real answer is--- we don't know! Estimates can be made by counting the number observable in a small area and then extrapolating that amount to the total visible area of our galaxy! The main problem is that many (maybe a majority) are not visible from our planet earth by what ever means we currently have available-- i.e. big telescopes; radio telescopes; x-ray telescopes; infared telescopes; etc. etc..--because they are not bright enough (such as red dwarfs) or hidden by "dust". The only realistic estimates usually pertain to "stars that we can 'see'".
2007-08-09 16:44:27 · answer #5 · answered by Anonymous · 0⤊ 2⤋
4
2007-08-09 16:31:40 · answer #6 · answered by Anonymous · 0⤊ 4⤋
I wouldn't say "it's impossible to know" or "scientists will never count them all", since nothing is impossible and someone might just as well come up with a way to count all stars in a given galaxy and it can happen as soon as tomorrow, you never know. But right now we know exactly that there's a heck of a lot!
2007-08-09 16:37:28 · answer #7 · answered by Anonymous · 1⤊ 2⤋
It's impossible to know the exact answer to that. All we can say is that there are billions of stars in our galaxy.
2007-08-09 16:32:54 · answer #8 · answered by Anonymous · 0⤊ 2⤋
There are about 10,000 to 20,000 crore stars in a galaxy.
2007-08-09 18:29:12 · answer #9 · answered by shubhu_94 1 · 0⤊ 0⤋
There's no way to get an exact number, but conservative estimates range from about 100 billion to as many as 400 billion stars.
2007-08-09 16:39:24 · answer #10 · answered by Anonymous · 1⤊ 2⤋