Encyclopedia of Astrophysics
by Søren Bertil F. Dorch
Publisher: Scholarpedia 2009
Encyclopedia of Astrophysics covers cosmology, stellar astrophysics, space exploration, extragalactic astronomy, solar physics, planetary physics, computational astrophysics, and history of astronomy. Written by researchers leading in their field.
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by Michael Perryman - arXiv
The history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy chronicle, having its origins in earliest records of astronomical observations, and extending to the high accuracy observations today.
by Dylan Steele (ed.) - NASA
From planets in our own solar system to snapshots from a time when our universe was very young, these images are presented according to their distance. Along with companion descriptions, the 25 images highlight the telescope's amazing capabilities.
by Nick Kaiser - University of Hawaii
These are the notes for an introductory graduate course. They are meant to be a 'primer' for students embarking on a Ph.D. in astronomy. The level is somewhat shallower than standard textbook courses, but quite a broad range of material is covered.
by Luis A. Anchordoqui - arXiv
University level lecture notes: distance measurements by parallax, HR diagram, distance to a star using HR, stellar evolution, the Olbers paradox, the expansion of the universe, gravitational redshift, lookback time, elementary particles, etc.