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Questions and Answers

Each category below contains a brief description about that topic.

The Chandra Mission Cosmology/Universe
Questions about the Big Picture: the size, age, mass and origins of the universe. Q&A

X-Ray Sources
Questions about specific types of cosmic X-ray sources. Dark Matter
WIMPS, extra-solar planets and other possibilites for the dark matter mystery. Q&A

X-ray Astronomy
Questions that have to do specifically with X-ray Astonomy. Q&A

General Astronomy and Space Science
Questions about astronomy and space science that don't fit in the above categories. Q&A

Questions about the Harvard-Smithsonian Center for Astrophysics, NASA, our image use policy, obtaining hard copies of images, job opportunities. Q&A

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We attempt to answer as many questions as possible, but because of the volume of email we receive, we are unfortunately often unable to answer all of them.

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