July 20, 2019 marks the 50th Anniversary of Apollo 11’s historic landing on Earth’s Moon.
In WorldWide Telescope, you can visit the Moon in context in “Solar System” mode, or see what the Apollo astronauts saw on their various missions to the Moon during the 1960s and 1970s, in “Panorama” mode.
This is a tour developed by Professor Alyssa Goodman at Harvard University. This tour introduces cepheid variable stars and how the relationship between their pulsation periods and their luminosities has helped to estimate cosmic distances.... Read more about Cepheid Variable Stars and the Cosmic Distance Ladder
