Astro 7n unit 4 quizzes
what are the differences between open star clusters and globular star clusters - correct answer Open clusters are less concentrated, younger, and have fewer stars
Which of the following is false - correct answer A nova is more luminous than a supernova
What kind of a gas cloud can collapse and form stars? - correct answer 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 - correct answer 4 million solar masses
how do you measure the mass of the supermassive black hole at the center of the Milky Way - correct answer look at the orbits of nearby stars and apply Kepler's third law
In the symbol for the Hubble type of a galaxy, SBc, the "B" denotes - correct answer the presence of a bar
What happens to the planets in a galaxy when that galaxy collides with another galaxy? - correct answer Nothing, because the spaces between stellar systems in a galaxy is much larger than their size
Which properties of spiral galaxies allow us to subclassify them as Sa, Sb, or Sc? - correct answer size of bulge and extent of spiral arms
Compared to spiral galaxies, elliptical galaxies have... - correct answer less gas, redder colors, and less new star formation
What is the difference between an E0 and an E7 galaxy? - correct answer The E7 has an oval shape and the E0 is circular.
what are the differences between open star clusters and globular star clusters - correct answer Open clusters are less concentrated, younger, and have fewer stars
Which of the following is false - correct answer A nova is more luminous than a supernova
What kind of a gas cloud can collapse and form stars? - correct answer 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 - correct answer 4 million solar masses
how do you measure the mass of the supermassive black hole at the center of the Milky Way - correct answer look at the orbits of nearby stars and apply Kepler's third law
In the symbol for the Hubble type of a galaxy, SBc, the "B" denotes - correct answer the presence of a bar
What happens to the planets in a galaxy when that galaxy collides with another galaxy? - correct answer Nothing, because the spaces between stellar systems in a galaxy is much larger than their size
Which properties of spiral galaxies allow us to subclassify them as Sa, Sb, or Sc? - correct answer size of bulge and extent of spiral arms
Compared to spiral galaxies, elliptical galaxies have... - correct answer less gas, redder colors, and less new star formation
What is the difference between an E0 and an E7 galaxy? - correct answer The E7 has an oval shape and the E0 is circular.
