VariousWords beta
Related Terms:
triangulum galaxy
siriometer
ly
oort cloud
length
gacrux
light day
kilolight
c decay
light second
lightspeed
light
gliese 581
aldebaran
absolute magnitude
beta lyrae
beta centauri
julian year
star cloud
stargate
parsec
light years
light month
alphecca
orion nebula
warp factor
parallax second
Definitions:
Noun
light year
light-year
Definition: the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers
Definition: A unit of length (abbreviation ly; equal to just under 10 trillion kilometres (10¹⁶ metres)) equal to the distance light travels in one Julian year; used to measure extremely large distances.