Tell me formula of one light year in kilometers

How many light years away is the center of the milkyway? And how long does it take for the light of it to reach the earth? I ...

My mom, brother, and I just had a conversation about this. So.. anyone care to explain it to me? :)

I have to do a project about sond and light waves and I need to know if a light wave is a transverse wave or a longitudinal w...

What is the average distance, in kilometers, between Mars and the Earth?

What is the speed of light through perspex a plastic with an index of refraction of 1.495?

Is there a difference between molecules, formula units, and atoms? Aren't they all particles? What is the difference? I don't...

Can you guy give me a cuple Polyatomic Ion Formulas?

Star Trek takes place in the 2200's and in the Star Trek Universe FTL (Faster than Light) speeds were developed in 2062. Sta...

If you have two identical clocks and you put one on the first floor of your house and the other on the second floor of your h...

I went out at like 2 am and saw 2 fly over, was wonderin if any one else saw??