mod 8 fam people

Question 1

what did Henriette leavette

Answer 1

discovered the period-lumonisity relationship

-helped to get understaning of how big the universe actually is.

Question 2

what were Harlow Shapley observations

Answer 2

our solar system sat at the edge of the solar system not at the centre as previously thought.
the size of the milky way glaxey
nebulae had velocities that indicated that they are moving away from us

Question 3

alexander Fredman

Answer 3

-reviewed Einstien’s theory of relativity-

mathematically that the universe must be expanding or contracting

Question 4

George Lemaitre-

Answer 4

analysed cosmological data to conclude that the universe must be expanding rate

Question 5

Hubble

Answer 5

-reckonised pattern between relative velocities and distances
he used leavites work on cepheid variables to measure distance to andromeda.
the constant estimated age of the universe is
accepted as expanding the universe.