Question

which of the following are units scientists use when describing distances in space?
miles
astronomical units
light years
kilometers
meters

Explanation:

• Miles: A unit of length, but not typically used in scientific space - distance descriptions in the international scientific community.
• Astronomical units: Commonly used to measure distances within the solar system. For example, the average distance from the Earth to the Sun is about 1 astronomical unit.
• Light - years: Used to measure extremely large distances in space, such as the distance between stars or galaxies. It is based on the distance light travels in one year.
• Kilometers: While kilometers are a metric unit of length, they are too small for most inter - stellar or inter - galactic distance measurements in space.
• Meters: An even smaller unit of length compared to kilometers, not practical for space - distance descriptions.

Answer:

B. astronomical units, C. light years