Suppose that you made the earth the size of a marble, 1 centimetre across. The distance to the Sun would then be about 120 metre; the size of the solar system (measured to the orbit of Neptune) would be about 7 kilometre; the nearest star would be 31,000 kilometre away; and the distance to the centre of our Galaxy (The Milky Way) would be more than the distance between Earth and Sun!
And that’s just one galaxy. So, now you have some idea how impossibly large our Galaxy is, let’s say that the Galaxy is the size of a marble (1cm across, again). Then, the size of the “observable universe” would be about 5 kilometre.
The “observable universe” is the part of the universe that physics says we could possibly ‘see’ if we had infinitely good, high-technology telescopes. Nobody really knows how much more of the universe there is beyond the observable universe. But in the observable universe alone, there are probably more than 100 billion (10^11) galaxies.
So you see how incredibly, unimaginably HUGE the universe is!
well, when I’m looking at it from earth then not really… it’s really pretty! BUT if i had to go up there I would be pretty scared! its not possible to survive up there and its soooooo big if I lose my way I would be gone forever. 🙁
Oh, yes!
It’s scarily, unimaginably LARGE, for one thing.
Suppose that you made the earth the size of a marble, 1 centimetre across. The distance to the Sun would then be about 120 metre; the size of the solar system (measured to the orbit of Neptune) would be about 7 kilometre; the nearest star would be 31,000 kilometre away; and the distance to the centre of our Galaxy (The Milky Way) would be more than the distance between Earth and Sun!
And that’s just one galaxy. So, now you have some idea how impossibly large our Galaxy is, let’s say that the Galaxy is the size of a marble (1cm across, again). Then, the size of the “observable universe” would be about 5 kilometre.
The “observable universe” is the part of the universe that physics says we could possibly ‘see’ if we had infinitely good, high-technology telescopes. Nobody really knows how much more of the universe there is beyond the observable universe. But in the observable universe alone, there are probably more than 100 billion (10^11) galaxies.
So you see how incredibly, unimaginably HUGE the universe is!
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Hi leelee1997
well, when I’m looking at it from earth then not really… it’s really pretty! BUT if i had to go up there I would be pretty scared! its not possible to survive up there and its soooooo big if I lose my way I would be gone forever. 🙁
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