Question

the immense gravity of the milky way’s central black hole, as well as gravitational attractions between massive objects within the milky way, help hold the entire galaxy together. select the true statements. billions of stars and planetary systems are part of the milky way galaxy. the center of the milky way galaxy orbits the solar system. the milky way galaxy is held together by gravitational forces. there is a supermassive black hole at the center of the milky way galaxy.

Explanation:

• The Milky Way is a large spiral galaxy containing an estimated 100-400 billion stars, most with associated planetary systems, so this statement is true.
• The solar system orbits the center of the Milky Way, not the reverse, so this statement is false.
• The opening text explicitly states gravitational forces (from the central black hole and between massive objects) hold the galaxy together, so this statement is true.
• The opening text references the Milky Way's central black hole, which is confirmed to be a supermassive black hole, so this statement is true.

Answer:

A. Billions of stars and planetary systems are part of the Milky Way galaxy.
C. The Milky Way galaxy is held together by gravitational forces.
D. There is a supermassive black hole at the center of the Milky Way galaxy.