First of all, a light year is not a measure of time. It is a measure of distance. A light year is the distance light travels in a year.
Second, it depends on the distance of the star. The closes star to us is the sun. Light from it takes 8 minutes to reach Earth. The next nearest is Proxima Centauri, from whigh light takes about 4 years to reach us. The stars we see at night are a few hundred light years from us. However, the vast majority of stars in the universe are to far away to be visible to the naked eye. The most distant stars are billions of light years away.
The speed of light [ c ] is a constant at 186,000 miles per second.
All stars are stationary (they do not move) if you are asking "how fast does the light of a star travel" then the speed of light is 186,282 miles per second.
Light propagates through space by way of radiation.
== == 300 000 000 m/s OR 300 000 km/s
8 minutes and 33 seconds.
Radiation
sound cannot travel through empty space.
Any electromagnetic wave can travel through space, and they all do.
Sound waves cannot travel through space.
No, there can't be conduction in empty space. Heat may travel through empty space through radiation, though.
Radiation
In the form of electromagnetic waves through free space at the speed of light 3 x 108 m/s
Electromagnetic energy PS: What does this have to do with religion and spirituality?
Radiation
Sound and Light can travel through space.
sound cannot travel through empty space.
Sound waves cannot travel through space.
Yes, a black hole could travel through space.
Any electromagnetic wave can travel through space, and they all do.
Sound waves cannot travel through space.
Electromagnetic waves can travel through space without a medium.
No, there can't be conduction in empty space. Heat may travel through empty space through radiation, though.