Interactive simulator without taking pictures:
Use this to help understand how the camera settings work.
Will help understand shutter speed, aperture, and ISO.
Try both links: DSLR CAMER SIM & DSLR EXPLAINER (top of screen, next to HOME)
The United States Naval Observatory (USNO) provides a wide range of astronomical data and products, and serves as the official source of time for the U.S. Department of Defense and a standard of time for the entire United States.
Complete sun and moon data for one day
Use these forms to obtain rise, set, and transit times for the Sun and Moon; civil twilight beginning and end times; and, lunar phase information. First, specify the date and location in one of the two forms below. Then, click the "Get data" button at the end of the form.
Use Form A for Marlton, NJ