• See the International Space Station ISS as it silently transits the sky, or even crosses the Moon, Sun, or encounters/occults planets or stars. Transits during twilight make ISS an obvious and easy target to the naked eye.
• Try out our E-mail Alert Manager. You first need to register and give your e-mail address; it's free − then you can subscribe to aurora alerts, good ISS passes and Iridium flares, satellites and ISS transiting the Sun or planets, your detailed daily celestial calendar, or simply get warned of the full Moon by e-mail.
• Zoom into weather satellite images, as if the satellite were above your site.
• Observe the star chart of your observing site.

Highlights

• You can receive your daily personal celestial calendar - selected from thousands of events. Then import events into Outlook, your PDA or other personal planner software - to be notified before an event takes place.
• Do you just want to find out the exact times of Sunrises or Moon phases?
• Explore the eclipses of our solar system! You can see solar and lunar eclipses; or explore how the moons of Jupiter play with their shadows.
• You can specify your observation site using an interactive interface - using our highly accurate map coordinate transformations, or simply query our geographic database containing 10 million names.
• Find and see the maximum phase of any solar eclipse from 1900 - 2100 from any place on Earth using our interactive eclipse maps.
• The more experienced amateur-astronomer will find much, much more information at her or his fingertips - your valuable tool from astronomers.