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by car audio crazy on January 26th, 2008
Who designed the Saturn V rocket?
by Answerbag Staff on April 28th, 2010
| 1 person likes this
Can They build space ships like star trek and actually make them fly??
by DaftPlanet on April 16th, 2010
| 1 person likes this
How long would it take humans to get to Saturn and how would we do it?
by Hoot99UK on May 27th, 2011
| 1 person likes this
What do you think of my propulsion idea?
by christhegenius on May 18th, 2010
| 1 person likes this
Space propulsion: what is the most likely type to get us through our solar system, and why do you believe that? also name the pros and cons of it.
by guardian on July 8th, 2009
| 2 people like this
You're reading How Many Millimeters In A Lightyear
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Comments
nice
by MrBLT needs to be contained on January 26th, 2008
If you are a scientist there is an EXACT answer since the meter is DEFINED in terms of the speed of light. The year used in light year is also DEFINED by scientists as one Julian year (defined EXACTLY as 365.25 days with EXACTLY 86,400 seconds per day). One light-year is therefore EXACTLY 9,460,730,472,580.8 km. In mm that would be 9,460,730,472,580,800,000 mm.
Reference: http://en.wikipedia.org/wiki/Light-year
by EagleEye88 on April 9th, 2011