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originally posted by: eManym
If a photon could perceive reality, wouldn't the photon's reality be one dimensional?
originally posted by: stumason
a reply to: Soylent Green Is People
How does this happen? Where does this mass come from?
originally posted by: Bone75
According to commonly accepted science, if I were to take off from where I'm standing at the speed of light, and head towards the Andromeda galaxy, it would take me 2.5 million years to get there.
Yet according to time dilation, the faster you go, the more time slows down. So even though it appears to everyone else that it took me 2.5 million years to get there, I would actually be much less than 2.5 million years old.
How does science reconcile this paradox? How can they say definitively that it takes light from the Andromeda galaxy 2.5 million years to get here? Wouldn't that light be much younger than we perceive it to be?
originally posted by: stosh64
a reply to: Bone75
IMHO, there is MUCH guess work when it comes to distances in space over 400 LY. And a lot of room for error in things within the 400 LY range.
They say that triangulation is the best method for stars within this distance, but the minute angles, even taken 6 months apart, and about 186 million miles apart, are so small I feel even these are guesstimates.
The first technique uses triangulation (a.k.a. parallax). The Earth's orbit around the sun has a diameter of about 186 million miles (300 million kilometers). By looking at a star one day and then looking at it again 6 months later, an astronomer can see a difference in the viewing angle for the star. With a little trigonometry, the different angles yield a distance. This technique works for stars within about 400 light years of earth.
For farther than 400LY they use brightness measurements, which makes me chuckle when I see statements like 250 million LY, or a billion LY. They really don't know.
As far as relativity and time, well, I will go wipe the drool from my chin and leave that to others to speculate.