Astrophysics Physics

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.

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• Space Physics Textbook - A free online textbook on space physics.
  
• AstroEngine - Space science blog by Dr Ian O'Neill discussing astrophysics concepts in an informed yet informal way.
  
• Temporal Annex - Information mostly on the fourth dimension and theoretical physics.
  
• Physics Topics - Teaching Notes - Teaching notes on celestial mechanics, classical mechanics, and stellar atmospheres.
  
• Encyclopedia of Astronomy and Astrophysics - Comprehensive archive of explantory articles on all key Astrophysics topics, categorised and fully searchable; actively updated by the Institute of Physics.
  
• You Be the Astrophysicist - Interactive site for learning about astronomy and astrophysics.
  
• Hands-On Astrophysics - Offers educational products that help students understand basic astronomy concepts.
  
• The Astrophysical Journal - Devoted to recent developments, discoveries, and theories in astronomy and astrophysics.
  
• SIMBAD Astronomical Database - The SIMBAD astronomical database provides basic data, cross-identifications and bibliography for astronomical objects outside the solar system. SIMBAD can be queried by object name, coordinates, other criteria (filters), and lists of objects.
  
• Cause of the Characteristics of Quasars - Hypothesis which attempts to explain the characteristics of QSOs (Quasi-Steller Objects), a.k.a. quasars, as optical illusions created by gravitational lensing and other phenomena.
  
• Solar System - Celestial Mechanics - Presents ideas about the rotation of the sun and planets.
  
• Gravity is Cool, or, Why our Universe is Hospitable to Life - Text of the 1999 Oppenheimer lecture at UC Berkeley given by professor Freeman Dyson on the origin of life and other subjects.
  
• Astrophysics and Astronomy - Introductory essays on astrophysics and astronomy.
  
• Virtual Institute of Astrophysics - VIA provides lectures and forums where scientists from around the world can communicate and discuss problems and ideas in astroparticle physics.
  
• Famous Astrophysicists - Profiles several prominent astrophysicists.
  
• Smithsonian Astrophysical Observatory - 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).
  
• Fermilab Theoretical Astrophysics Group - Partially funded by a NASA Astrophysics Theory grant, find information about the group's past and future meetings.
  
• University of Surrey - Department of Physics (Research) - University of Surrey abridged version of the book "Astrophysics" , with many links to relevant material on astronomy, astrophysics and cosmology.
  
• The Electric Universe - 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.
  
• Network Generator - Generates astrophysical reaction rates online using an extended database.
  
• Hubble Red Shift and Quantum Evolution - Michael Lewis provides an equation describing the Hubble red shift light decay curve using existing mathematics.
  
• Nuclear Astrophysics Data - An area for providing nuclear data for astrophysics calculations, such as nucleosynthesis, stellar evolution, the Big Bang, and super-nova dynamics.
  
• Tuneable Heterodyne Infrared Spectrometer - THIS - 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.
  
• The Structure, Stability, and Dynamics of Self-Gravitating Systems - An interactive Astrophysics textbook from Louisiana State University.
  
• Titius-Bode Law - Overview of the Titius-Bode Law.
  
• Astrophysics - 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.
  
• The Astrophysics Spectator - 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.
  
• The Titius-Bode Number Sequence Deciphered - Compares earth orbit to other planets using the Astronomical Unit as a measurement.
  
• Hyperspace - Site devoted to hyperspatial theories.
  
• Grand Challenge Problems in Computational Astrophysics - Research session at the Institute for Pure and Applied Mathematics (IPAM), Los Angeles, CA, USA; 7 March - 10 June 2005.
  
• Cambridge Relativity - Beginner's guide to all the basic concepts of Astrophysics written by active scientists at Cambridge University, UK.
  
• Canadian Institute for Theoretical Astrophysics - Nationally supported research centre. Find out about current research, upcoming seminars and job opportunities.
  
• NASA Astrophysics Data System - Search system for abstracts in astrophysics, planetary sciences and solar physics.
  
• Red Shift by Photon Decay - Author explains how Hubble's red shift of starlight spectra results from photon decay, proportional to traveled distance.
  
• Olber's Paradox - A well know problem from astrophysics, Olber's paradox (Why is the night sky dark?), solved. As well as Newton's related Gravity paradox.
  
• The NASA Astrophysics Data System - 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.
  
• Encyclopedia of Astrophysics - A free peer-reviewed online publication written by scholars from around the world.
  
• Living Reviews in Solar Physics - 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.
  
• Above the Skies, An Exploration into Our Universe Through Animated Spectroscopy - A description at the layman level about the applications of spectroscopy in the investigation of the Solar System, with interactive diagrams
  
• Modified Newtonian Dynamics - Overview of a controversial theory which is not generally accepted by the astrophysical community.
  
• High Energy Astrophysics Group - Astronomical Institute, Ondrejov. Focuses on the research of cosmic objects in X-ray and gamma spectra region. General information, projects and workshops.
  
• ADC Quick Reference: Basic Data on Galaxies - An online astrophysics catalog that helps the user toward some of the more frequently used ADC dataset holdings regarding galaxies.
  
• Dyson Sphere - A list of frequently asked questions with answers.
  
  

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