Hard Hard difficulty. The Milky Way Galaxy What is the estimated total mass of the Milky Way (including dark matter) in solar masses? Answer 1.5 trillion solar masses Draw the answer
Intermediate Intermediate difficulty. The Milky Way Galaxy Which Milky Way globular cluster was first discovered, by Abraham Ihle in 1665? Answer Messier 22 Draw the answer
Hard Hard difficulty. The Milky Way Galaxy Which two astronomers discovered Sagittarius A* in 1974? Answer Bruce Balick and Robert Brown Draw the answer
Intermediate Intermediate difficulty. The Milky Way Galaxy Which gamma-ray space telescope discovered the Milky Way's Fermi bubbles? Answer Fermi Gamma-ray Space Telescope Draw the answer
Intermediate Intermediate difficulty. The Milky Way Galaxy Which NASA space telescope helped reveal the Milky Way's central bar in infrared surveys? Answer Spitzer Space Telescope Draw the answer
Hard Hard difficulty. The Milky Way Galaxy What supernova remnant is one component of the Sagittarius A radio source? Answer Sagittarius A East Draw the answer
Hard Hard difficulty. The Milky Way Galaxy Which dense cluster near the Galactic Center is named for five infrared sources? Answer Quintuplet Cluster Draw the answer