Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties (luminosity, density, temperature, and chemical composition) of celestial objects and the interstellar medium, as well as their interactions.
Space science blog by Dr Ian O'Neill discussing astrophysics concepts in an informed yet informal way.
E-Print archive since April of 1992.
A short introduction to astrophysics with associated articles on a number of topics.
Wikipedia article on this branch of astronomy that deals with the physics of the universe, including the physical properties of celestial objects and the interstellar medium, as well as their interactions.
Introductory essays on astrophysics and astronomy.
Beginner's guide to all the basic concepts of Astrophysics written by active scientists at Cambridge University, UK.
Nationally supported research centre. Find out about current research, upcoming seminars and job opportunities.
Hypothesis which attempts to explain the characteristics of quasi-stellar objects as optical illusions created by gravitational lensing and other phenomena.
A list of frequently asked questions with answers.
Comprehensive archive of explanatory articles on all key Astrophysics topics, categorised and fully searchable; actively updated by the Institute of Physics.
A free peer-reviewed online publication written by scholars from around the world.
Partially funded by a NASA Astrophysics Theory grant, find information about the group's past and future meetings.
Text of the 1999 Oppenheimer lecture at UC Berkeley given by professor Freeman Dyson on the origin of life and other subjects.
Astronomical Institute, Ondrejov. Focuses on the research of cosmic objects in X-ray and gamma spectra region. General information, projects and workshops.
Michael Lewis provides an equation describing the Hubble red shift light decay curve using existing mathematics.
A peer-refereed, solely online journal publishing invited reviews covering all areas of solar and heliospheric physics research. Published by the Max Planck Institute for Aeronomy, Katlenburg-Lindau, Germany.
Search system for abstracts in astrophysics, planetary sciences and solar physics.
Generates astrophysical reaction rates online using an extended database.
An area for providing nuclear data for astrophysics calculations, such as nucleosynthesis, stellar evolution, the Big Bang, and super-nova dynamics.
A well know problem from astrophysics, Olber's paradox (Why is the night sky dark?), solved. As well as Newton's related Gravity paradox.
Teaching notes on celestial mechanics, classical mechanics, and stellar atmospheres.
A research institute of the Smithsonian Institution headquartered in Cambridge, MA, where it is joined with the Harvard College Observatory (HCO) to form the Harvard-Smithsonian Center for Astrophysics (CfA).
A free online introduction to space physics in the areas of plasma physics, regions, phenomena, instrumentation and modeling. Last updated October 7, 2008.
Information mostly on the fourth dimension and theoretical physics.
Devoted to recent developments, discoveries, and theories in astronomy and astrophysics.
Articles published on this site cover current research in astronomy and astrophysics, describe our current understanding of astronomical phenomena, and comment on issues related to astronomical research.
Physics knows four forces; 20th-century scientists were convinced that one of those, the electric force, played no macroscopic role in the Universe; site explains why that is incorrect.
The Astrophysics Data System (ADS) is a NASA-funded project which maintains four bibliographic databases containing more than 4.0 million records: Astronomy and Astrophysics, Instrumentation, Physics and Geophysics, and preprints in Astronomy.
An interactive Astrophysics textbook from Louisiana State University.
Instrument pages for the transportable receiver designed for atmospheric and astrophysical observations in the mid infrared spectral region (7-28 µm). Developed by the University of Cologne.
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