Astronomy Calculators 2.0

The program calculates planetary/lunar ephemerides, orbit properties, and downloads live images of the Sun, satellite tracks and auroral ovals from the internet.
Features:

- As seen on the Sky at Night magazine's CD-ROM!
- Calculate focal ratios and the optical properties of your setup.
- Calculate planetary and lunar ephemerides, and sunrise/sunset times.
- Calculate satellite and planet orbital periods.
- Unveil the true capabilities of your telescope and eyepieces.
- Easy to use and resource-friendly.
- Download data easily from the internet.