bluewaterrider
Senior Member
Originally posted by DarthAnt66
What's their rebuttals about light and how it would be impossible to see anything beyond the, IIRC, Crab Nebula like Neil mentioned in Cosmos?
To the best of my knowledge, the age of the universe is reckoned, by so-called "mainstream science", via a phenomenon called "redshift".
The idea behind it is that light, being a type of wave, or at least a phenomenon that has significant wavelike properties, parallels a type of behavior common with sound waves called the Doppler Effect. With sound, like say the arrival and then passing of a train, the observer perceives an increase in sound as the train approaches, a high plateau as the train is there moving swiftly past your face, then a drop in sound to partial or complete fade out as it disappears swiftly down its track.
That's for sound.
For light, it's a little bit different. Light approaching an observer, instead of getting louder to the ears, apparently becomes more and more blue.
Light going AWAY from an observer, by contrast, apparently becomes more red.
The closer, in general, the brighter and bluer.
The further, in general, the more red and faded.
Using this principle, if memory serves, astronomers have dated the universe to roughly 13 billion years old. This is roughly the light year rating, again if memory serves, of objects called quasars.
Quasars are regarded as possessing enormous amounts of energy because they are apparently extremely red, as measured by this "redshift" meter, and therefore not only extremely far away, but still moving away.
13 billion years later.
Quite remarkable.