Why are astronomical distances measured in light years?
The distances between stellar bodies do not change.
The gravity of stellar bodies does not change.
Light always travels in a straight line.
The speed of light is always constant.
Important Facts
Astronomical distances are measured in light years because the speed of light (300,000 km/s) is constant throughout the universe and is known for its high precision.
Rate this Question
Related Question Facts
Astronomical distances, such as those between planets and stars, are so vast that measuring them in kilometers is impractical, hence AU, light years, and parsecs are used.
No comments yet.