Resources
Q & A
Glossary
Acronym Guide
Further Reading
Outside the Site
Google Sky
WWT
Facebook
Youtube
Vimeo
Twitter
Flickr
Pinterest
Multimedia, Etc
Images/Illustrations
Animation & Video
Special Features
Chandra Podcasts
Chandra Mobile
Desktop Images
The Big Chandra Picture
High Res Prints
Presentations
Handouts
Screen Savers
Audio
Web Shortcuts
Chandra Blog
RSS Feed
Chandra Mobile
Chronicle
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Glossary

A | B | C | D | E | F | G | H | I | J K L | M
N | O | P | Q | R | S | T | U V | W X Y Z



Q

quantization The fact that light and matter on small scales behave in a discontinuous manner, and manifest themselves in the form of tiny "packets" of energy, called quanta.

quantum A discrete physical unit into which something can be divided, for example a photon, or the difference in energy states in an atom.

quantum mechanics The framework of laws governing the behavior of particles on atomic and subatomic levels. It starts with the assumption that energy is not infinitely divisible, but comes in quanta.

quark A fractionally charged, basic building block of protons, neutrons, and other elementary particles.

quasars Originally, a distant, highly luminous object that looks like a star. Strong evidence now exists that a quasar is produced by gas falling into a supermassive black hole in the center of a galaxy. [More Info: Field Guide]

Quasi-periodic Oscillations (QPO's) Variations in the intensity of X-radiation from sources that show periodic behavior for short time intervals, and a variety of periods.

A | B | C | D | E | F | G | H | I | J K L | M
N | O | P | Q | R | S | T | U V | W X Y Z