How long would it take to get across thegalaxy,  sun, solar system at the speed of light?
460461
A) Galaxy, about 100,000 years.\n\nB) Sun, about 5 seconds\n\nC) Solar System, it depends on if you mean the orbit of Pluto or all the way out to the Oort cloud.
1098746
hold on here, this isnt a short answer - \n    the Earth is on average 92Million miles from the sun, times pi for the circumforance and its roughly 290Million miles around.  divided by 365 for the number of days, the earth travels some 790,000 miles on one day, ya thats high on the odometer.  distance in one day divided by 24 hours comes to 33,000 MPH, now i did this on my computer but it does seem right, \n\nNow part 2, hang on here, big numbers ahead, the Solar System wihich Earth belongs to is roughly 26,000 Lightyears from the galactic core, (which has a Supermassive Black hole as heavy as 6 Trillion suns).  it take a quarter of a Billion years (250,000,000) for our solor system to complete one revolution around the galaxy. The circumferance could be some 80,000 Lightyears,  though i am not sure how to calculate the speed of the solar system.
1061558
Moving faster than light isn't really the real issue for space travel as traveling AT the speed of light solves all the distance problems(unless you are interested in time travel!). Of course that in itself is a big challenge. If one could demass the vehicle then surely one could achieve the speed of light!!! Afterall photons do travel at this speed.\nBut we would do very well even with speeds like .99999c because time dilation will reduce the time required drastically. Have the science, just need the technology!
297501
I'm sure you are spekaing strictly hypothetically, but don't forget the closer you get to the speed of light (c), the slower time moves around you.  So if you were to go like 90% of c for 1 year, more than 1 year would pass for everyone else.
540450
well, this really isn't a question about astronomy, but imagine the trip were possible, and you could travel as close to lightspeed, c, as you chose.  special relativity shows that you could choose how long the trip would take by choosing your speed.  the distance of the trip will shrink more and more the faster you choose to go.  if the trip were to cross the galaxy (100 000 ly) and you traveled at:\n0.9999c (9 x 10e-4) the distance would look like 1000 ly and take 1000.10001 years.\n0.999999c (9 x 10e-6) the distance would look like 100 ly and take 100.0001 years\n0.99999999c (9 x 10e-8) the distance would look like 10 ly and take 10.0000001 years\n\nthis is actually observed in nature.  high speed cosmic atomic nuclei are continuously raining down on earth, and sometimes one strikes the nucleus of an atom in the upper atmosphere and produces a muon.  muons are very short-lived and shouldn't have time enough to reach us down here before decaying, but they do.  the muons are traveling so fast that they see the distance between the upper atmosphere where they originated to here as much shorter than we do so they have enough time to travel the short distance before decaying.\n\nlook here:\nhttp://en.wikipedia.org/wiki/Special_relativity
193083
It would take 4.3 years to get to the nearest star (Proxima Centauri) if you were traveling at the speed of light. However, it would take nearly 118,000 years to get there if you were traveling at the speed of a space shuttle (approximately 25,000 mph).
194179
The distance from the earth to the sun is about 93 million miles. The speed of light is about 186,000 miles per second. Dividing shows that it tkes light about 500 seconds to go from the sun to the earth. That's 8 minutes 20 seconds.
278785
Aproximately 5 hours, 30 minutes and 30 seconds.\n\nThe speed of light= 186,382 miles per second\nDistance from the Sun to Pluto= 3,694,673,109 miles\n\nSo it will take 19,838 seconds to get to Pluto, which equals 330.5 minutes, which equals 5.5 hours.
105036
Earth revolves around this shinning star called a sun and it takes about 365 to 366 days to make a round trip around the sun.\n\n60 minutes and not 100 minutes --> Ever looked at a globe and the time zones? \n\nweek consists of 7 days --> Again with the Earth revolving around the sun.
221827
by using the speed of light. As the Sun emits the light, it takes time to reach Earth. The speed and time taken is calculated to get the distance between the two. It takes about 7 minutes for the light to reach Earth. So looking at the sun from Earth is looking at the Sun 7 minutes ago!
151979
I tried to figure this out and it's incredibly complex, as it turns out.\n\nThe earth rotates at a little over 1037 miles an hour, so you've got that.\n\nThe earth revolves around the sun at about 66486 miles an hour, so you add that.\n\nThen you consider that the sun is moving toward other stars at 45,000 miles per hour.  (and taking us along with it.)  So if you were outside our solar system, you'd see that too, I guess.\n\nThen you add that the sun moves up and down (if you consider the disk of the solar system to be the horizon) at about 261 mph.\n\nThen you add in the sun revolving around the galaxy, which is a difficult thing to calculate, but it can be figured that the sun revolves around at about a blistering 447,386.4 miles per hour.\n\nAdd that all up and you see that, relative to a person standing OUTSIDE the galaxy, we're moving at ABOUT....\n\n\n493,684 miles per hour!  That's awfully fast!\n\nNow, I have no idea how to calculate this, but the whole galaxy is moving as the universe expands...\n\nBut, hope that gives you somewhat of an answer.
616855
The sun is approx 98 million miles away, light travels 186,282.397 miles per second. So we would know ( and die) about 8.768 minutes later
327223
1 lightyear is the distance a beam of light can travel in a vacuum in one year.  Given that the speed of light is roughly 3*(10^8) meters per second, or about 670.6 million miles per hour, then 93 million miles is about 1.58*(10^-5) lightyears.  Another way to look at it, is that it takes about 7.21 minutes for light from the sun to reach earth, and they are roughly 93 million miles apart.
6671
The exact speed of light is 299,792,458 m/s\n\nTo be precise, what we usually call the "speed of light" is really the speed of light in a vacuum (the absence of matter). In reality, the speed of light depends on the material that light moves through. Thus, for example, light moves slower in glass than in air, and in both cases the speed is less than in a vacuum. However, the density of matter between the stars is sufficiently low that the actual speed of light through most of interstellar space is essentially the speed it would have through a vacuum, so we don't make much error by ignoring the difference.\n\nTo make it easier for you to convert, here is the speed in alternative units :\n\n(1) 983,571,056.4304461 foot/second\n(2) 11,802,852,677.165352 inch/second\n(3) 1,079,252,848.8 kilometer/hour\n(4) 299,792.458 kilometer/second\n(5) 582,749,918.3585312 knot\n(6) 880,991.0899527 mach\n(7) 670,616,629.3843952 mile/hour (mph)
320843
The actual time of travel from Saturn to the Earth will vary depending on the geometries of the two planets in their orbits, but will be between about 75 minutes and about 92 minutes.
313161
about 186,000 miles per second.  With our present technology, it would take hundreds of thousands of years. At the speed of light, it would only take thousands of years.
644825
According to Special Relativity Theory, when you are transporting a mass at a speed near lightspeed, the energy needed to increase your speed rises to infinity. We can't provide the system with enough energy to reach the light of speed.\n\nEnergy, though, can travel at the speed of light because it has no mass. If we could transform a mass in energy (remember: E = m c^2) and re-create it at destination, travelling at lightspeed would be possible.\n\nBut, as Dark Helmet said, speed of light is too slow. We need ludicrous speed!