Microwave Limb Sounder (MLS) - Measures naturally-occurring microwave thermal emission from the limb (edge) of Earth's atmosphere to remotely sense vertical profiles of atmospheric gases, temperature, pressure, and cloud ice. Find instrument background, data, and images. - http://mls.jpl.nasa.gov/
Tropospheric Emission Spectrometer (TES) - Information about the project, instrument specifications, data products, images and animations. - http://tes.jpl.nasa.gov/
Ozone Monitoring Instrument (OMI) - Find instrument specifications, data products, validation, science background, and news. - http://www.knmi.nl/omi/
Wikipedia - Aura (satellite) - Includes an overview of the program and summary of specifications. - http://en.wikipedia.org/wiki/Aura_%28satellite%29
Earth Observatory Library: Aura - Offers an overview of the program, discussion of science results, and instrument details. - http://earthobservatory.nasa.gov/Library/Aura/
Aura - Researches the Earth's atmospheric chemistry, including ozone, air quality, and carbon content. Find details about the spacecraft, instruments, mission operations, data validation, images, and science results. - http://aura.gsfc.nasa.gov/
NASA - Aura - Includes mission news, fact sheets, press kits, and featured multimedia. - http://www.nasa.gov/mission_pages/aura/main/index.html