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Ask an Astrophysicist
Library of Past Questions


First time visitors: Please be sure to read our main page!

  • 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. 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?

  6. How can you separate multiple exoplanets in radial velocity measurements?

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.

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

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