Emerald Observatory – Celestial Poetry for your iPad

Emerald Observatory for iPad is a one of a kind astronomical app for your iPad. The app displays a wealth of astronomical information, and simply looks amazing, almost like if it was a physical object – the app even offers an option to constantly stay on if you feel like using it as a screensaver.

Main features include:
- Times of rise and set for the Sun, the Moon, and the 5 classical planets
- Times of the beginning and ending of twilight
- Heliocentric orrery (display of the planets in orbit around the Sun)
- Altitude and azimuth for the same bodies (one body at a time)
- Current phase and relative apparent size of the moon
- Current regions of day and night on a world map
- The Equation of Time, solar time, UTC time, and sidereal time
- Month, day, year, and leap-year indicator
- Displayed times are synchronized via NTP to “atomic clock” standard
- Uses iPad location, or the latitude and longitude may be set manually

If you are into astronomy, this is the one app to have. Best of all, Emerald Observatory for iPad costs less than a buck.