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The fastest unmanned space craft traveled 157,000 mph. At that rate, there and back would take only 8,500 earth years. So if you were a Mesopotamian farmer in 6,500 BC, you'd be getting home right about now.
1 light year is defined as the distance that light travels through vacuum in
one year. This tells us that in vacuum, such as interplanetary space, it takes
light one year to travel a distance of one light year.
Approx 11.7 trillion miles.
Neptune has an average distance from the Sun of 2.8 billion miles and the earth is 0.09 billion miles from the sun so it is 2.71 billion miles from the earth. Light travels at 186,000 miles per second. So 2.71 x 109 divided by 186,000 = 14570 seconds = 4.05 hours = 4.62 x 10-4 years.
LIGHT travels at about 670,616,629.384 miles per HOUR, not per second!Converting m.p.h. to miles per second, then the approximate speed of light would be about 186,282 miles per second.IF lightning travels at the speed of light (which it doesn't!) then 186,282 miles in one second divided by the approximate circumference of the earth, i.e. 25,000 miles, equals 7.45, or say seven and a half times round the earth, or once every 1/7.45 = 0.13 seconds.However! Lightning does not travel as fast as light! It has been approximated that lightning, on average, travels at about half the speed of light. So, one continuous flash of lightning, in a tight circle close to the earth, could travel round the earth 3.725 times, approximately.-----------------------------------------Note: I agree the " tethering " of the cloud and the earth via the electrons and protons from each, does not travel at the speed of light.However; this connection between the two creates an "electrical bolt" which in turn creates a flash of light, which, as the name suggests, does travel at 300,000 kms/sec i.e. the speed of light.-------------------------------------------For more information, see 'Related questions' and 'Related links' below.
Light takes about 8 minutes to travel from Earth to the sun. The sun is about 93 million miles away, so it would take about 177 years to get to the sun in a car traveling at 60 miles per hour, and about 21.5 years to get to the sun in an airplane traveling at 500 miles per hour. (These are just comparisons; cars and airplanes don't travel in outer space.)
The Zeta Reticuli binary star system is located 39.17 light-years, or 230,265,762,450,700.25 miles (That's 230 trillion miles) away from the Earth. At that distance it would take a Saturn V rocket 1,072,165.5 years to travel there.
Light goes at 670 million miles per hour, which is 670 times faster, and it takes 4 years to get to the nearest star. So at one million miles per hour it would take 2700 years to travel there.
Sunlight takes 8.4 minutes to travel 93 million miles to Earth. It would take us that long to reach the Sun at light speed.
A light year - is the distance a pulse of light would travel in an earth 'year'. This equates to a distance of5,869,713,600,000 mile in a single year. Something 10,000 light years from earth would be at a distance of58,697,136,000,000,000 miles - or roughly 58,697 BILLION miles away!
Neptune has an average distance from the Sun of 2.8 billion miles and the earth is 0.09 billion miles from the sun so it is 2.71 billion miles from the earth. Light travels at 186,000 miles per second. So 2.71 x 109 divided by 186,000 = 14570 seconds = 4.05 hours = 4.62 x 10-4 years.
It would take 65 years 11 months to travel to Aldebaran from Earth traversing at the speed of light.
As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.As light travels about 186,000 miles per second, it would take about 3 days, 2 hours and 40 minutes for light to travel 50,000,000,000 miles.
The speed of light is ~186,282 Miles per second. You do the math.
If light rays did not travel through space there would be no way for them to reach Earth.
LIGHT travels at about 670,616,629.384 miles per HOUR, not per second!Converting m.p.h. to miles per second, then the approximate speed of light would be about 186,282 miles per second.IF lightning travels at the speed of light (which it doesn't!) then 186,282 miles in one second divided by the approximate circumference of the earth, i.e. 25,000 miles, equals 7.45, or say seven and a half times round the earth, or once every 1/7.45 = 0.13 seconds.However! Lightning does not travel as fast as light! It has been approximated that lightning, on average, travels at about half the speed of light. So, one continuous flash of lightning, in a tight circle close to the earth, could travel round the earth 3.725 times, approximately.-----------------------------------------Note: I agree the " tethering " of the cloud and the earth via the electrons and protons from each, does not travel at the speed of light.However; this connection between the two creates an "electrical bolt" which in turn creates a flash of light, which, as the name suggests, does travel at 300,000 kms/sec i.e. the speed of light.-------------------------------------------For more information, see 'Related questions' and 'Related links' below.
The distance around the earth at the equator is 24,902 miles. Light travels in a straight line at 186,282 miles per second in a vacuum. So 24902 / 186262 is 0.13 seconds. To get a pulse of light to travel around the earth, you'd have to have a fiber-optic cable running around the earth's equator. Light travels a bit slower in optical glass than in a vacuum so it would take a pulse of light a bit longer to make one trip around the earth. In reality, light traveling in an optical fiber can't travel that far without being degraded. So the actual travel time factoring in the time the light pulse would have to be within an amplifier every sixty miles or so would slow the pulse down a bit more. Still it's a lot faster than a speeding bullet!
Light takes about 8 minutes to travel from Earth to the sun. The sun is about 93 million miles away, so it would take about 177 years to get to the sun in a car traveling at 60 miles per hour, and about 21.5 years to get to the sun in an airplane traveling at 500 miles per hour. (These are just comparisons; cars and airplanes don't travel in outer space.)
To find the distance between the Earth and Moon you would use Lunar distance. Lunar distance is the measurement from and to the Earth and Moon which calculates 238,900 miles
well the speed of light is roughly 186000 miles/second so you would be about 22766400000 miles away