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Answer:
By observing individual Cepheid variable stars in Andromeda and applying the period-luminosity relation
Explanation:
In 1924, Edwin Hubble proved that the Andromeda Galaxy lay far beyond the bounds of the Milky Way, thus putting to rest the idea that it might have been a cloud within our own galaxy. He was able to prove this BY OBSERVING INDIVIDUAL CEPHEID VARIABLE STARS IN ANDROMEDA AND APPLYING THE PERIOD-LUMINOSITY RELATION
Answer:
It can cost less because you wont have to pay for gas and then have to drive there.
Explanation:
This is more cost efficient because stamps and envelops cost less then your average gas price for most states.
By looking at the picture I think you are correct . I hope this helps
