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Use this information to answer Questions 6-10. By 1900, astronomers had photographed many hundreds of "spiral nebulas". It was not well understood what these objects were at that time. Star-birth Model: One model explained these objects as the birth places of new stars and planets within the Milky Way galaxy. In this interpretation, the spiral nebulas were small, rotating, slowly-collapsing clouds of hot gas and dust. Island-Universe Model: An alternate model of that time explained the spiral nebulas as "island universes" similar in size and structure to the Milky Way. In this second interpretation, the spiral nebulas were enormous collections of stars and many dark clouds of gas held together by gravity. In 1900, telescopes were not powerful enough to observe directly what the spiral nebulas were made of, how far away they were, or how hot or cold they were.By 1925, Edwin Hubble had reliably measured the distance to one spiral nebula, the Great Nebula in Andromeda, and discovered that it was millions of light-years away. Which model - star-birth or island-universe - did Hubble's distance measurement support? O island-universe O star-birth Question 10 1 pts A few years later, Hubble and his assistant Milton Humason were able to observe that nearly all spiral nebulas were rushing away from our location in the Milky Way. Additional observations showed that these same spiral nebulas were many millions of light-years away. Did these observations support the star-birth model or the island-universe model? O island-universe O star-birthBy the 1920's, astronomers like Vesto Slipher of Lowell Observatory in Flagstaff, Arizona, were using improved instruments to study spiral nebulas. Slipher and others detected the signature of stars but not hot, glowing gas in the light emitted by the spiral nebulas. Which model - star-birth or island-universe - was supported by these observations? O island-universe O star-birth