m**c
发帖数: 7349 | 1 But over the last 13.8 billion years, the Universe has been continually
expanding – and at first it did so very rapidly. Taking that into account,
astronomers have worked out that the galaxies right on the edge of the
observable Universe, whose light has taken 13.8 billion years to reach us,
must now be 46.5 billion light years away
One possibility is that, somewhere, a few of our calculations are not quite
right
That is our best measurement for the radius of the observable Universe.
Doubling it, of course, gives the diameter: 93 billion light years. | l**p
发帖数: 6080 | 2 又是地心说
,
quite
★ 发自iPhone App: ChineseWeb 13
【在 m**c 的大作中提到】
: But over the last 13.8 billion years, the Universe has been continually
: expanding – and at first it did so very rapidly. Taking that into account,
: astronomers have worked out that the galaxies right on the edge of the
: observable Universe, whose light has taken 13.8 billion years to reach us,
: must now be 46.5 billion light years away
: One possibility is that, somewhere, a few of our calculations are not quite
: right
: That is our best measurement for the radius of the observable Universe.
: Doubling it, of course, gives the diameter: 93 billion light years.
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