Seeing the Universe

You can see what x-ray astronomy adds to the other wavelengths if we take a close-up look at a galaxy known as "Centaurus A."

The National Solar Observatory at Kitt Peak
Association of Universities for Research in Astronomy

This is one of the best optical images...


In radio light these jets shoot out from the galaxy a distance about 6 diameters of our milky way galaxy!!!

(Very Long Baseline Array)


(Space Telescope Science Institute-Hubble)

This is what Hubble's powerful eye sees... a dark disk left over from what may have been a collision between an elliptical galaxy and a smaller spiral galaxy...


(HST: Near Infrared Camera and Multi-Object Spectrometer)

Zooming further in, even Hubble's eye gets blocked by all the gas and dust


But using infrared light, Hubble can see through the dust to the hot gas researchers think is swirling around a black hole many millions of times more massive than our Sun!


Earlier, the "Einstein" X-ray Observatory had been able to see deep down, to where the energetic jets begin...


Now Chandra can resolve still finer details of this active galactic nucleus...




Electromagnetic Spectrum
The electromagnetic spectrum explained in simple terms using real-life examples.

Imagine the Universe
An introduction on the electromagnetic spectrum including why we need to go into space to see the entire spectrum.

Electromagnetic Spectrum
This site explains each type of electromagnetic radiation, its uses and the dangers from too much exposure to the radiation.

Interactive Multimedia Adventures for Grade-school Education Using Remote Sensing (IMAGERS)
A simple explanation of electromagnetic radiation including each type of radiation, how we "see" using that type of radiation and what that type of radiation shows us.

NASA's Observatorium
An introduction to the electromagnetic spectrum.

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