Back to Ay 20 Home
Cool Astronomy Links
Astronomy Picture of the Day
The NASA Multimedia Gallery
- loads and loads of pictures
What's Up?
- the week's sky highlights, from Sky & Telescope
The Leonids
always arrive during the middle of the term, and definitely vary in spectacularness from year-to-year
Moon Phases
by Chris Dolan
Nearby Stars
from SolStation.com
Space Weather News
Real Pictures of the Sun from NASA
Universe Today
- space news from around the internet
Encyclopedia of Astronomy and Astrophysics
Basic Optics
-- definitions and interactive tutorials
Gravitational Orbits
-- your basics from Kepler
Blackbody Radiation
Interactive Hydrogen energy level diagram
Atomic Spectra
(visual wavelengths)
Spectroscopy Net
Maxwell-Boltzmann velocity distribution
visualization applet
Boltzmann equation
visualization applet (population of atomic energy levels)
Visual Spec
-- spectroscopy concepts
Simulations of Stellar Nucleosynthesis
Stellar Structure and Evolution Simulator
The Once and Future Sun
-- stellar evolution in context
Web Simulations of Astrophysical Phenomena
-- highly recommended!
Orbit Animations
of the nearest stars from SolStation.com
The Nine Planets
- a Multimedia Tour of the Solar System
Solar System Orbit / Collision Simulators
An illustration of chaos in the solar system: the Double pendulum
animation of pendulum
;
animation of the orbits
Movie of the orbital motions of stars at the Galactic Center
-- highly cool!
Caltech Astronomy Homepage
Robinson/Downs Rooftop Observatories
-- Caltech's instructional telescopes