A lightyear is the distance light can travel in one year. If the sun is 150,000,000 km away, how many light years is the sun from the earth? Assume that light travels at a speed of $3.00 * 10^10 cm/s$. Thanks for any help!?

1 Parsec = 3.26 Light-years 3.26 Light-Years is the the distance which light covers in 3.26 Years 1 Light-year = 9.4 x $10^12$ km 3.26 Light-Year = 3.26 * 9.4...

Its visual magnitude is about 11.0

$1 arc sec= (1/3600)^o=(1/3600)(pi/180)$ radian=4.848 E-06 radian. 1 AU = 149697871 km 1 parsec = 1 AU/(1arc second in radians) = 30.86 trillion km

For your long-term-memory: If $alpha$ radian is the parsec angle, the formula for distance = 1/$alpha$ AU. Here, $alpha$=(0.379/3600)($pi$/180) radian.=1.8374 E-06 radian. So, d=1/1.8374 AU=544000 AU. Unit conversions: In lu...

Alpha Centauri is the nearest star as far as present knowledge allows. So the distance to Alpha Centauri is 25700 000 000 000 Putting this value into scientific notation involves...

Near bye stars.. standard candles. variable stars. Type !a supernova. for details read Wikipedia cosmic distance ladder.\ link

$1ly~~5.8786*10^12mi$ Therefore, $4.3ly~~4.3(5.8786*10^12)=2.5278*10^13mi$

The universe isn't expanding at the speed of light. It's expanding at a rate of 68 kilometres per second per megaparsec. The rate of expansion isn't a speed because the...

The light year and parsec are used for large distances .like distance to stars and galaxies. 3.26 light years a parsec.

Light takes about 5.5 hours to reach Pluto from . If you know the time that light takes to reach certain object, you can deduce the distance to that object...