Why Are Telescopes Sometimes Called "Time Machines

Why are telescopes sometimes called "time machines"?

A) because the author,H.G.Wells,used the term to describe telescopes in a book
B) because some of the oldest telescopes are still in use today
C) because observations of distant objects reveal them as they were in the past
D) because astronomers can use telescopes to see the Milky Way as it was when it was much younger
E) It's a journalistic misnomer: you cannot travel into the past or the future.

Correct Answer:

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