Telescopes
Telescopes Quiz
Interferometry
What is Interferometry?
Interferometry is a technique used by scientists and engineers. Tools called interferometers add together 2 or more waves of light. When they do this, the waves of light interact (or interfere) with each other. This can add the waves together, making them brighter. It can also cancel the waves out. Interference only takes place if the waves come from the same object or have the same frequency. We call these types of wave coherent.
Timeline of Astronomy
John Johnson
Credit: NASA
Occupation: Astrophysicist & Professor of Astronomy
Year born: 1977
Research Areas: Exoplanets
Kevin Govender
Credit: IAU/Kevin Govender
All rights reserved. Used by permission.
Occupation: Director of Office of Astronomy for Development
Year born: c. 1981
Research Areas: Nuclear Physics, Astronomy, Sustainable Development
Allan Chapman
Occupation: Historian
Year born: 1946
Research Areas: History of Science, History of Astronomy, Broadcasting
"Historians of astronomy…are… people with a broad and open-minded curiosity about those forces which drove human endeavour in the past."
Galileo Galilei
Credit: J Sustermans
Occupation: Astronomer, Mathematician, Engineer
Year born: 1564
Research Areas: speed, velocity, motion, astronomy, tides
Chandra X-Ray Observatory
Credit: NASA/CXC/NGST
Image Processing
showing that what appeared to be an elliptical galaxy is actually a spiral.
Credit: NASA/JPL/Caltech/SDSS/NRAO/L. Hagen and M. Seibert
