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Information about galaxies and their brightness. Using images of three spiral galaxies to measure galaxy flux.
The key to classifying a galaxy as a Seyfert Galaxy is the presence of broad emission lines from the bright, star-like nucleus. They are often strong radio and infrared sources. The first such active ...
Take part in real astronomy research by joining this public project classifying galaxies and taking part in citizen science.
How to draw a map of the galaxy as if viewing it from the outside.
Four ways to measure how much stuff there is in a galaxy cluster.
Martin Rees (1942 - ) has made important contributions to the theories of galaxy formation, galaxy clustering, and the origin of the cosmic background radiation.
Explore the milky way in 3D
A fun game to try to see if you can tell what's older just by looking at it, and how we can tell the age of galaxies from the light they emit.
A visual tour of our galaxy.
Measuring the red shift for several galaxies from spectral lines.
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