Astronomy > EXAM > Astro 1 Unit 4 | 40 Questions with 100% Correct Answers | Updated | Download to score A+ (All)

Astro 1 Unit 4 | 40 Questions with 100% Correct Answers | Updated | Download to score A+

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What are the differences between open star clusters and globular star clusters? - ✔✔Open clusters are less concentrated, younger, and have fewer stars Which of the following is FALSE? - ✔✔A ... nova is more luminous than a supernova What kind of a gas cloud can collapse and form stars? - ✔✔The gas cloud must have a mass that exceeds the Jeans mass so that gravity overcomes the internal pressure in the cloud What is the mass of the black hole at the center of the Milky Way? - ✔✔4 million solar masses How do you measure the mass of the supermassive black hole at the center of the Milky Way? - ✔✔Look at the orbits of nearby stars and apply Kepler's third law About how long does it take light to cross the Milky Way galaxy? - ✔✔About 100,000 years What does our galaxy look like? - ✔✔It has a large disk with spiral arms, and is relatively flat and thin It has clouds of gas and dust in the spiral arms Older yellow stars are found mostly in the central bulge Old stars and globular clusters are located in a spherical halo above and below the disk [Show More]

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