Is 1 day in earth 75 years in space?

Answer 1

If we try to measure space distances the same way we measure distances on earth, we would be dealing with very large numbers. The nearest star to earth is approximately 26,395,632,000,000 miles away from earth. To convert to smaller numbers that are easire to handle, we refer to space distances in terms of light-years. That is the amount of distance something would travel in a year going at the speed of light (186,000 miles/second or 300,000,000 meters/second). This way, the nearest star to earth is only 4.5 light years away.

Einstein's theory of relativity basically states that when an object moves, time for that object slows down. But you would have to be going very very fast before the decrease in time could be measured.

Suppose an astronaut wanted to travel to earth's nearest star that is 4.5 light years away. His spaceship would travel at a speed of .87 times the speed of light. Even at such a fast speed, a round trip journey would take a little over 10 years to make (earth time). But because velocity affects time, the astronaut would have aged a little over 5 years after he returns to earth where everyone else has aged over 10 years since he left. If the astronaut travelled at a slower speed, the difference in ages would not be that large.

Answer 2

no.
space is actually a spacetime dimension there is no end or beginning.
Space dimensions are calculated in light years by us earthlings since we can't do any better. The concept of spacetime is difficult enough, so we created time which we measure (basically) using a very slow eartlhy based "time" system: earth's slow orbit around the sun as the year and earth's own turn on its axis as the length of time for 24 hrs.

Answer 3

No, time on earth is the same as in space. I don't know where you got 75 years from. The only thing that comes to mind is Halley's Comet. That comet returns to Earth once every 75 years.

Answer 4

unless your going very very fast (some fraction of the speed of light) or you are near something very, very massive like a black hole then 1 day is always 1 day. now lets say you were going half the speed of light or you were near a black hole. time would slow down for you. so what might be 75 years to someone on earth that isnt moving might be 60 years to you.

Answer 5

It could be, if you're in space, and you're going at a "relativistic" speed, one that makes a difference in relitivity equations.

It's hard to measure things like time and space on those scales because it's different for every point of refference.

for all situations we have today, 1 day = 1 day.

Answer 6

nicely, a twin of earth which God might exhibit to extraterrestrial beings residing hundreds of light-years away might somewhat count on what the extraterrestrial beings predicted to be certain relative to their very very own planet... Bloody hell, God could be somewhat knackered working all those products out! it would in all threat have been a hell of plenty easier to enable all that primordial hydrogen waft around for somewhat and notice what form of universe it is going to unquestionably formed. God is possible ageless, so some billion years would not have been this form of great wait...

Answer 7

Where would get that idea from?
One day *on* Earth (not "in" Earth, in the Earth there is no sunlight so no day or night) is one day anywhere humans are (we have clocks with us).

Answer 8

I'd say it all depended on the speed you were traveling, or at least, the reference frame of speed or time.
24 hours = 24 hours, unless you throw in a variable, like speed, to mess up the constant.

Answer 9

What? No. 24 hours is 24 hours anywhere unless you go really really fast.

Answer 10

It just seems that way.