1) why do astronomers use different measurement systems to discuss distance in the universe? a) because light behaves different as the universe expands b) because scientists are trained all over the world and there is no universal measurement system c) because it allows the numbers to be more manageable 2) which measurement system has the largest value? a) astronomical unit b) light year c) parsec

1) Astronomers use different measurement systems to discuss distance in the universe C) because they allow the numbers to be more manageable.

The numbers are so huge that astronomers need different units to express them.

2) The measurement system with the largest value is C) the Parsec .

1 Parsec = 3.26 ly = 2.06 × 10⁵ AU  

thats a little if u want the answer just look it up on google thats what i do haha : )