All kinds of museums including art, science, cultural, zoos, etc. Includes observatories, societies, university departments, astronomers' personal pages. Each person's page also has links to other pages dedicated to the person. Great source of puzzles, science projects, and of course illusions. With index to other illusion and puzzle sites and a bibliography.
Images show what observers on the ship see as it approaches light speed.
Demonstrates Lorentz shift, dilation of time, aberration of light, Doppler shift, etc. A wide-ranging resource. Very large index of physics institutions and organizations. This page is part of a larger index. Mostly for primary and secondary school.