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Ask an Astrophysicist
Library of Past Questions


  • 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.

Resources for this Topic

  1. NASA's Astrobiology Institute (

  2. The Extrasolar Planets Encyclopaedia (

Library of Past Questions and Answers

  1. Can you tell me more about those new planets that were found?

  2. How common are planetary systems around other stars?

  3. Can you tell me about the new solar system that has been found?

  4. How are solar systems created?

  5. Can you tell me the differences between exoplanets and brown dwarfs?

    Life in Space

  1. What are the remote indicators of life on Earth from space?

  2. Has evidence been found for life on Mars?

  3. What would an alien be like on Europa?

  4. Is there any other form of life out there?

  5. What are the chances of life existing outside our solar system?

  6. Where can I find information on extraterrestrial life?

  7. Could life based on an element other than carbon exist?

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
Acting Project Leader: Dr. Barbara Mattson
All material on this site has been created and updated between 1997-2012.

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