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Related Q&A Categories

starQuasars & Active Galaxies

starPhysics of Stars
Ask a High-Energy Astronomer
Library of Past Questions

Milky Way and other Galaxies

  • Check out the resource links. These are the sites we often point to in answering your questions.
  • Browse through the library of questions below.

Resources for this Topic

  1. The Cosmos (http://xrtpub.harvard.edu/xray_sources/galaxies2.html)

  2. Cosmos in a Computer (http://www.ncsa.uiuc.edu/Cyberia/Cosmos/CosmosCompHome.html)

  3. Galaxies (http://www.seds.org/messier/galaxy.html)

  4. Multiwavelength Galaxy Atlas (http://astronomy.swin.edu.au/staff/gmackie/atlas/atlas_edu.html)

  5. The MultiwavelengthMilky Way (http://adc.gsfc.nasa.gov/mw/milkyway.html)

Library of Past Questions and Answers

    The Milky Way Galaxy (Our Own)

  1. How large is the Milky Way galaxy?

  2. Where is the Solar System located in the galaxy?

  3. What is our Sun's rate of speed in relation to the center of our galaxy? Is our galaxy moving as well?

  4. What is the age of the Milky Way compared to the Universe?

  5. How many stars (or what percentage) in our galaxy are 4.5 billion years old (age of the Sun) or older?

  6. What is the proof that the Milky Way is a barred spiral?

  7. Do you have any pictures of the Milky Way Galaxy from above?

  8. Why are far away galaxies visible to telescopes, but not the center of ours?

  9. Do you know where I can find information about mapping the Milky Way at different wavelengths?

  10. Are there more Pop I or Pop II stars in our galaxy?

  11. What do you know about the dwarf galaxy that is colliding with our own?

  12. Was the Milky Way galaxy once a Quasar?

    Other Galaxies

  1. How many galaxies are there in the Universe?

  2. What is the closest other galaxy to the Milky Way?

  3. What different types of galaxies are there?

  4. What type of galaxy is the most abundent?

  5. What is the average size of a galaxy?

  6. What is the nature of spiral arms in galaxies?

  7. What happens when galaxies collide?

  8. Can galaxies lose mass when they interact?

  9. Who first discovered the nature of galaxies?

  10. How accurate are the published distances to other galaxies?

  11. What are lenticular galaxies?

  12. Do all galaxies have large black holes at their center?

    Clusters of Galaxies

  1. How are the Local Group of galaxies selected?

  2. Do we need teraflop and petaflop computers for calculating the evolution of clusters of galaxies?

  3. What is the Great Attractor?

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