The Ultimate Milky Way Galaxy Quiz

• The Milky Way galaxy is shaped like a grindstone with the Sun near the center.
• Harlow Shapley used Cepheids and RR Lyrae stars to estimate the galaxy's size and distance.
• The galaxy contains a disk component, a central bulge, and an extensive halo of dark matter.
• Spiral arms are sites of star formation and may be produced by density waves or self-sustaining star formation.
• The nucleus of the galaxy is marked by a radio source, Sagittarius A*, which likely contains a supermassive black hole.
• The disk of the galaxy is younger than the halo, which formed first.
• Stellar populations reveal that the metal abundance of more recent generations of stars has increased.
• The monolithic collapse hypothesis does not match all of the current evidence.
• The newer "bottom-up" hypothesis includes mergers with smaller galaxies and infalling gas contributing to the disk.
• The Milky Way galaxy formed about 13 billion years ago.

Take our Milky Way galaxy quiz to test your knowledge on the structure, formation, and mysteries of our home galaxy. Learn about the different components of the Milky Way, such as the central bulge and halo of dark matter, as well as the role of spiral arms in star formation. Discover the research methods used to estimate the size and age of the galaxy, and the significance of the radio source Sagittarius A*. Challenge yourself to understand the different hypotheses of galaxy formation, including the newer "bottom