2006-10-27 06:36:37 · 7 answers · asked by C. 2 in Science & Mathematics ➔ Astronomy & Space
Light travels approximately 300,000 km/s. A year is 31,557,600 seconds. So to answer your question, multiply the speed of light by the number of seconds in a year by 4.2. Comes out to be almost 40 trillion km.
2006-10-27 06:45:17 · answer #1 · answered by dogsaysmoo 3 · 1⤊ 0⤋
Multiply the speed of light(186 thousand and some odd miles per hour, by the number of meters in a mile. Take that answer and multiply it by the number of hours in a year. Be exact, there are 365.25 days in a year. That's a lot of hours. Multiply that answer by 4.2 should give you the distance to the nearest star in meters. Lots a Luck!
2016-05-22 01:03:51 · answer #2 · answered by ? 4 · 0⤊ 0⤋
i think it'll go like this
speed of light in vacuum = 3 x 10^8 m/s (thats 3 x 10 raised to power 8 or 300000000)
duration of 1 light year = 365 days
therefore distance travelled by light in 1 year = time x speed
= 365 x 3 x 10^8
= 109,500,000,000m
therefore, if time taken by light to reach earth from that star is 4.2 light years
distance between earth and that star = 4.2 x 109,500,000,000
= 459,900,000,000 m
since 1 km = 1000 m
therefore distance from earth to star is 459,900,000,000 divided by 1000
= 459,900,000km
2006-10-27 07:10:48 · answer #3 · answered by amandac 3 · 0⤊ 1⤋
speed of light is 3×10^8 m/s
so the nearest star would be 3×10^8m/s×4.2×365x24x60x60s=39735360000000000 m far
=39735360000000 kms far
2006-10-27 06:45:41 · answer #4 · answered by Nature Boy Ash 1 · 0⤊ 0⤋
Hi. Light goes about 300,000 km per second (or just a bit less). Find the number of seconds and then multiply.
2006-10-27 06:41:07 · answer #5 · answered by Cirric 7 · 0⤊ 1⤋
39,735,360,000,000 km , or nearly 40 trillion kilometers.
2006-10-27 06:45:12 · answer #6 · answered by Anonymous · 1⤊ 0⤋
its simple just the number is way to long it will end up like (random numbers) 4564787(then 3 dots)...
all together it will show up as 4564787...
2006-10-27 06:41:45 · answer #7 · answered by craftyboy 2 · 0⤊ 1⤋