The light-year is defined to be the
A) time it takes light to travel from the Sun to the Earth
B) time it takes for light to travel from the nearest star to the Earth
C) distance light travels in one year in space
D) average distance between the Earth and the nearest star
C
You might also like to view...
There are many types of galaxies, but the most massive galaxies are going to be....
A. lenticular. B. barred spirals. C. irregulars. D. ellipticals.
Contrast the sources of Jupiter's and the Earth's internal energy flows
What will be an ideal response?
A ball is rolled horizontally off a table with an initial speed of 0.24 m/s. A stop watch measures the ball's trajectory time from table to the floor to be 0.20 s. How far away from the table does the ball land? (g = 9.8 m/s2 and air resistance is negligible)
a. 0.24 m b. 0.048 m c. 0.39 m d. 0.15 m e. 0.47 m
When a meteoroid enters Earth's atmosphere, it is called a(n) ______________
a. meteor or "shooting star" b. asteroid c. star d. planet e. dwarf planet