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Ask an Astrophysicist
Library of Past Questions

Satellites & Space Technology

  • We no longer answer questions on this topic, to concentrate our limited resources on questions on space based astrophysics and closely related areas (see this page for more explanation).
  • Check out the resource links. These are the sites we used to point to in answering your questions.
  • Browse through the library of questions below. We may have already answered your questions.
  • Also try our Ask an Astrophysicist Search Engine!.

Library of Past Questions and Answers

    Rockets and propulsion

  1. What are the types of rocket propulsion?

  2. What's in rocket fuel ?

  3. What kind of fuel is used in spacecraft?

  4. Do today's rockets use the same fuel as the Apollo missions used in the late 60's and early 70's?

  5. How fast do our current spacecraft travel?

  6. Is a solar powered rocket possible?

  7. Can Helium particles push a solar sail better than sunlight?

  8. Is it possible for a satellite to piggy-back onto a comet?

  9. Can you tell me about new space propulsion systems?

  10. Tell me about ion propulsion

  11. Is an anti-matter or nuclear propulsion drive possible?

    Satellites
  1. How many artificial satellites are there and who owns them?

  2. What is the altitude required for a geostationary orbit?

  3. What are the conditions and requirements for a Sun-synchronous satellite orbit?

  4. Where can I find information on the newest missions?

  5. Can you help me find information on two Soviet Satellites that reentered our atmosphere?

    Future Possibilities

  1. Would you have any information on possible NASA projects to do astronomy from the Moon?

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Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Jim Lochner
Curator:Meredith Gibb
Responsible NASA Official:Phil Newman
All material on this site has been created and updated between 1997-2008.
Last Updated: Monday, 07-Apr-2008 15:22:28 EDT

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