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This new guide for astronomers, known as the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) shows the Milky Way in submillimetre-wavelength light (between infrared light and radio waves [1]). Images of the cosmos at these wavelengths are vital for studying the birthplaces of new stars and the structure of the crowded galactic core.

" the starting point for access to data from the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS).  This page provides a brief summary of the facilities and data products to guide Pan-STARRS archive users.  More complete information is provided on linked pages (see below)."

A guide on buying used astronomy equipment online, very handy tips on what to look out for.

Despite all warnings, and sane advice not to buy a telescope, but rather start with a good pair of binoculars, you decided that you want one, no matter what. It's all right; I did the same thing. I think most amateur astronomers did that too

These study guides were created based on undergraduate courses taken at UC Berkeley from 1997-2001 and graduate courses taken at Harvard University in 2002-2003. They are posted as a public service to anyone interested in physics or taking college level Physics/Astronomy/Math courses.