if light travels at 299,792,458 meters per second. Per minute it would travel 17,987,547 km. Per hour it would travel 1,079,252,849 km. Per day light will travel 25,902,068,371,200 km.
Per normal year it will travel 9,354,354,955,488,000 km or in AU’s 62,530,001 or in milliparsecs 277,911.11.
One AU is 149,597,871 km.
One milliparsec is 225 AU’s.

Very nice marcusw, but you might be surprised to know that most scientists round their numbers up, so they don’t get mixed up so easily. When you’re talking about the distance from one galaxy to the next, 1, or 10, or even 100 km isn’t going to make a massive difference!

## Comments

professorofbadgerscommented on :That is very annoying! As in how long it will take!

marcuswcommented on :if light travels at 299,792,458 meters per second. Per minute it would travel 17,987,547 km. Per hour it would travel 1,079,252,849 km. Per day light will travel 25,902,068,371,200 km.

Per normal year it will travel 9,354,354,955,488,000 km or in AU’s 62,530,001 or in milliparsecs 277,911.11.

One AU is 149,597,871 km.

One milliparsec is 225 AU’s.

Adamcommented on :Nice maths.

marcuswcommented on :thanks

just to let you know I did it long hand, in free time in a maths lesson in year 7 at Muont House School.

professorofbadgerscommented on :That makes my brain hurt… I might just stop reading now…

Leilacommented on :Very nice marcusw, but you might be surprised to know that most scientists round their numbers up, so they don’t get mixed up so easily. When you’re talking about the distance from one galaxy to the next, 1, or 10, or even 100 km isn’t going to make a massive difference!