Question

n astronomer observes a star 1,000 light years away. what does this mean about t being observed?
it left the star 1,000 years ago
it shows the stars current state
it is distorted by earths atmosphere
it was reflected off nearby planets

Explanation:

A light - year is the distance light travels in one year. If a star is 1000 light - years away, the light we see now left the star 1000 years ago. The current state of the star (what it is like right now) cannot be known immediately because the light (which is the information we receive about the star) takes 1000 years to reach us. While Earth's atmosphere can distort light (e.g., twinkling of stars), this is not related to the concept of a light - year. Also, the light from stars is not typically reflected off nearby planets in a way that would explain the 1000 - light - year observation in this context.

Answer:

It left the star 1,000 years ago.