How do you know it exists ?
bonikingv
2007-07-28 04:10:35 · 14 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
and when the light reaches us, the galaxy itself might cease to exist
2007-07-28 04:19:34 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Hi,
The speed of Light is:
186,000 Miles per second, but the speed of thought is
Faster. All matter in the universe is composed of Light,
i.e., Photons that make up both Matter and Energy.
To travel from far galaxies takes Light Years and can
have many variables. The question is, How Fast is Fast?
2007-07-28 04:24:00 · answer #2 · answered by Anonymous · 0⤊ 1⤋
The same speed that it is to go from Earth to far away galaxies, and that is, 186,282 miles per second or 300,000 kilometers per second. I don't know which galaxy you may be referring to, so I can't tell you whether or not it exists. Since we are looking way back in time when we look through the various powerful telescopes on Earth, and the Hubble telescope in space orbit, many stars probably have turned into black dwarfs (dead cool stars)by now!!!
2007-07-28 06:57:19 · answer #3 · answered by Old Truth Traveler 3 · 0⤊ 0⤋
My friend, speed of light remains a constant - 300000000 m/s.
We don't know whether the galaxy exists, however we can safely say that it existed. We know that it existed because the light which has left that galaxy some years ago in our direction has reached us and it has been noted.
2007-07-28 04:19:53 · answer #4 · answered by Ajay 3 · 0⤊ 0⤋
particular, the gap can enhance quicker than 'c'. And if so, the sunshine being emitted 'now' will on no account attain us. And if the galaxy emits gravity waves, they're going to on no account attain us. no longer something from that galaxy will ever attain us from now on. yet in its very own perfect coordinate device, the galaxy isn't moving quicker than gentle. If the universe had a device of meter sticks and clocks in a inflexible grid, the cost of the galaxy relative to the meter sticks and clocks close to it, could be under 'c'. in case you may study the articles at those links without blowing your recommendations, then you definitely might have a splash of ways it extremely is dealt with via scientists.
2016-11-10 10:43:16 · answer #5 · answered by ? 4 · 0⤊ 0⤋
Speed of light is 186,000 miles per second. Takes 7 or 8 seconds for the sun lite from the Sun and hit the earth. Because the sun is shining today...Thats how I know it exhists..
2007-07-28 05:37:20 · answer #6 · answered by Gerald 6 · 0⤊ 0⤋
186,282.397 miles per second (or 299,792,458 meters/second) for the speed of light in a vacuum. It's been determined by several methods and even defined as that quantity.
For how they measured it -- again, it's been done several ways, but the most famous is the Michelson-Morley experiment of 1887. Yahoo search will take you right to it.
2007-07-28 04:19:46 · answer #7 · answered by bobo383 3 · 0⤊ 0⤋
We have been measuring the speed of light with ever-increasing precision from Galileo's day onward. Galileo's experiment failed, but he was smart enough not to label light's speed 'instantaneous.' It was, 'if not instantaneous, too fast to measure.'
The first precise measurement was by Michelson and Morley in 1887. We have improved our precision since, but the speed is firmly established at -- in round numbers -- 186,000 miles/second. The continuing story of how that speed is measured is fascinating, but too lengthy for this answer. It's NOT in doubt.
2007-07-28 04:19:41 · answer #8 · answered by anobium625 6 · 1⤊ 0⤋
The speed of light is one of the true Constance in the universe.
2007-07-28 04:53:51 · answer #9 · answered by JOHNNIE B 7 · 0⤊ 0⤋
the speed of light is 186,282.397 mile per second. Exists? Would it kill you to take it on "faith". ha ha.
2007-07-28 04:17:18 · answer #10 · answered by Anonymous · 0⤊ 0⤋