Traveling at 70 mph, how long would it take to travel 1 light year.?
537507
1 lightyear = 9.4605 × 10^15 meters\n70 miles/hr = 9.875*10^8 meters/year\n\n9.4605 × 10^15 meters/ 9.875*10^8 meters/year = 9.58*10^6 years
383249
The Hubble Space Telescope can see out to a distance of several billions of light-years. A light-year is the distance that light travels in 1 year. Since light has a speed of 186,000 miles per second (light can travel about 7 times around the entire earth in 1 second!), light travels about 5,865,696,000,000 miles in just one year. You can attach 9 more zeros to the end of this to get 1 billion light-years and another one for 10 billion light-years. The farthest that Hubble has seen so far is about 10-15 billion light-years away. The farthest area looked at is called the Hubble Deep Field.
426747
The speed of light is a measurement of how fast light travels in a vacuum. The speed of light also known as "c" as in the famous Einstein equation E=mc^2. And its equal to 299,792,458 m/s or in U.S miles per hour is about 670million miles per hour!!!!!!! It would take light coming form the sun only 8 seconds to arrive on earth which is 92million miles away. Now say "WOW!!"
621324
Around 105 light years, or 3x10^5 km/s * 365 * 24 * 3600s * 105 km, or 993 384 000 000 000 km, or 617 277 076 989 996 mi
919666
The distance to the sun is 150 million km. So the circumference is 940 million km. The earth takes a year to do it, or 31.6 million seconds. Therefore the average speed is 29.8 km/sec  or 107200 km/hour or 66600 miles/hour.
512134
A. First, do a quick magnitude check to see if you can use Newtonian physics or need to use special relativity. Your Newtonian velocity would be \nv = at \n  = 1g x seconds in a year  \n  = 10m/s x 3.15x10^7 seconds \n  = 3.15x10^8 m/s.\nwhich is greater than the speed of light (= 2.99x10^8 m/s), so you do need to use relativity.\n\nThe relativistic equation for velocity after constant acceleration is (source 1):\n v = c tanh(aT/c)\nusing aT from above, \n v = c tanh(3.15x10^8 / 2.99x10^8)\n   = 0.78c\n   = 2.34 x 10^8 m/s\n\nB. Now that you have v, use the special relativity energy equation to calculate your energy (see source 3)\nE = (gamma) x mc^2\n(gamma) = 1/sqrt(1- v^2/c^2)\n(gamma) = 1.61\nE = 1.61mc^2\n\nThis energy includes the rest mass, mc^2, which we don't need to add (it was there before we started), so the kinetic energy is\nKe = 0.61mc^2\n   = 5.48x10^19 Joules\nOf course, no propulsion systems are 100% efficient, so it would take more energy than this.  Rockets, in particular, are very inefficient, and would take many orders of magnitude more energy.\n\nC.  Nothing we have even comes close. For comparison, this is about 100 times the entire world's energy production in 2002.
72735
No it is not possible to travel faster than light because the equipment you try to use will not work. The fastest thing to probably work may be a fast car. But there is still no way to travel fater than the speed of light. Speed of light travels at about 7 miles per second. I hope this helps.
687280
Not counting the sun, the closest star to earth is Proxima Centauri, which is about 4.1 light years away from the earth. Light travels at 300 000 km/s so you can now use this to calculate the distant. 4.1 light years x 365 days per one light year x 12 months per 1 year x 30 days per one month, x 24 hours per one day x 60 minutes per one hour x 60 seconds per one minute = 4,654,713,600 seconds. Multiply this figure by 300 000 km/s and you get an answer of 1,396,414,080,000,000 Kilometers.
415548
light travels at 186,000 miles per second, the earth is 25,000 miles around....\n\n25000/186000= 0.1344 seconds
45682
I love this question. The best way to do conversions is to simply type them into Google like this:\n\n25 light-years in miles\n\nWhich gives roughly 147 trillion miles. See how easy it is? This is a great Google tip.\n\nYou could enter this on your calculator as 147 EE 12\n\nIn metric 25 light-years is roughly 237 petameters (237 Pm) which is about the distance to the Star Fomalhaut in the constellation of the Southern Fish.\n\nBy comparison our Milky Way Galaxy is hundreds of billions of stars in a disc about 100,000 light-years across.
259168
Light travels at 670,616,629.4 miles per hour, so you multiply that by the number of hours in 35 years.\n\n35 years x 365 days/year x 24 hours/day x speed of light in miles/hour.\n\nIt's like 205,611,058,574,040 miles.
1040094
I remember it being said that if you were to travel at light speed for an hour, the amount of time that would pass on Earth would equate to years.  Indeed, it went further on to say that a baby would have grown into an old person in the amount of time that elapsed.  Taking that into account (let's say 60 years), assuming that the passage of time would be linear, and that there are 8,760 hours in one year, then perhaps some 525,600 years would've passed on Earth.  \n\nHowever, I'm thinking I did something wrong here.
964882
It depends where on Earth you are.\nAt the North Pole, you're not moving at all (at least in this frame of reference - you're still moving with the Earth round the Sun, with the Sun round the Milky Way, and so on), just spinning on your axis.\n\nAt the Equator, you travel the circumference of the Earth, approximately 40,075km, in 23 hours 56 minutes (a siderial day), giving you a speed of 1674 km/h or 1,040 mph.\n\nAt other points, your speed will be somewhere in between.
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.
352573
Based on the fact it took one of the space probes 13 -14 years to get there, I'd have to say at least 15 years.  Think of it, round trip, you'd be 30 years older than when you left Earth.  Boy, they's have to offer some mighty sweet health benefits and a superbadass 401k before I'd consider it.
1174698
16 min approx by light\n250,000 hours by jet\n2 million hours approx by fast car\n80 million hours by foot\n\n150 Tm from earth (150 million km)
50535
OK, first fo all Mr cliffx has it backwards.  As you continue to acellerate tworads the speed of light time will slow down for you and stay normal for everyone else.  Thus at that speeds you could travel 10000 lightyear in only 1 year, your lifetime, but thousands of years could pass on earth.\n\nIt has been theorized that time travel is posible but you could not simply accelerate to that speed.  Even if we could travel that fast the economical need would be currently beyond what any country has, even if they put all there funding into that one project.  but I am getting off the subject.\nOne theory is to travel into a black hole.  The gravetational field in a black hole is so strong that it has been theoryzed that even time cannot escape.  Thus if we were able to travel into a black hole we could use the captuered time there, so to speak, and transverse the timeline.\n\nThen there are ideas of actually traveling on light waves, lasers, to allow us to travel to the speeds necisary.  Of course then we could only travel to the time of how long that peice of machinery is on.  Also we would have to convert ourselvesinto an electrical signale, data (essicially transport), which would then bring up the promblum of measuring matter without moving it and blah blah blah.\n\nSummery, Yes it is possible to travel through time.  We just do not havet he knowledge and/or technology to do it yet.