How many major spiral arms does the Milky Way have?
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- Intermediate Intermediate difficulty.
- The Milky Way Galaxy
Which Milky Way globular cluster was first discovered, by Abraham Ihle in 1665?
Answer
Messier 22
- Hard Hard difficulty.
- The Milky Way Galaxy
Which two astronomers discovered Sagittarius A* in 1974?
Answer
Bruce Balick and Robert Brown
- 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
- 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
- Hard Hard difficulty.
- The Milky Way Galaxy
What supernova remnant is one component of the Sagittarius A radio source?
Answer
Sagittarius A East
- Hard Hard difficulty.
- The Milky Way Galaxy
Which dense cluster near the Galactic Center is named for five infrared sources?
Answer
Quintuplet Cluster