Does anyone know what spectra Hubble was observing when he noticed the redshift and what bit of kit he would have used to dedect the spectra (would he have been looking at a paper printout or a screen, or a dial)?
2006-12-09 10:22:18 · 4 answers · asked by anthonypaullloyd 5 in Science & Mathematics ➔ Astronomy & Space
Doug, I may not know the answer, but I haven't got sh*t for brains. I've put this question up AFTER having tried what you suggest.
2006-12-09 10:43:22 · update #1
I believe it was hydrogen emission lines that Hubble noticed had moved. These would have been on photographic plates from a spectrogram.
2006-12-09 11:04:58 · answer #1 · answered by Iridflare 7 · 1⤊ 0⤋
it incredibly is the purple-shifts in the spectra of galaxies (particularly than stars) that time out an increasing universe. the place comparisons with different distance indicators could properly be made and at distances a techniques sufficient away that the specific velocity of a galaxy is in basic terms a small fraction of the plain velocity because of the prevalent enlargement, the purple-shift is is viewed to be proportional to the gap, it incredibly is gadgets two times as a techniques away show two times as lots purple-shift. this implies that area itself is increasing as that would reason gadgets at greater beneficial and bigger distances to seem to recede at quicker and quicker expenditures. An explosion of be counted interior a static area would not bring about the style of result.
2016-12-18 10:32:50 · answer #2 · answered by ? 4 · 0⤊ 0⤋
1. Type 'hubble red shift' into a search engine
2. Get a bit under 200,000 hits
3. Go wade through them and find the answers you seek.
Doug
2006-12-09 10:40:03 · answer #3 · answered by doug_donaghue 7 · 0⤊ 1⤋
Try this....
2006-12-09 12:23:41 · answer #4 · answered by grotereber 3 · 0⤊ 0⤋