What advantage does Hubble have over ground-based telescopes?
No matter how big your telescope is on the ground you just can't see through
the air very well because the atmosphere is
turbulent. So even though you can see the stars
with your eyes they're blurry they're twinkling they're doing things that you
can't really compensate for yet from the ground so
space telescope gives you a sharp image that you can't get from the ground.
In astronomy there's what we knew before Hubble and now there's what we know
after Hubble they're so different. Of course Hubble has now
had a life of 30 years so it's had a long time to make this revolution
happen so it's not all at once it's a gradual revolution but it's still
a huge revolution.
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I think the Hubble telescope has been the most productive science instrument
ever built so it is indeed the most astonishing thing.
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