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Education

Ephemeris Sky
 +  iPhone app / iPad app 雙系統版本
Optimized for iPhone5
View In iTunes
原App Store內容轉載:
   
  
On sale for FREE! For a limited time.

Ephemeris Sky is a unique application that calculates realtime positions for objects in our solar system, demonstrating the incredible computing power of the iPhone/iPad.

You can watch a brief tutorial video by clicking on "Developer Website" link.

Ephemeris Sky calculates the following realtime values for each of the planets...

Current Altitude
Current Azimuth
Planet Rise Time
Planet Set Time
Rise Azimuth
Set Azimuth
Culmination

Distance from Sun
Distance from Earth
Orbital Velocity

Ecliptic Longitude
Ecliptic Latitude
Heliocentric Longitude
Heliocentric Latitude
Distance (angular) from Perihelion
Distance (angular) from Aphelion
Planet's Declination
Planet's Right Ascension

Planet Phase
Apparent Magnitude
Angular Diameter
Axial Tilt To Orbit

The following clocks are also included…

Local Civil Time (LCT)
Coordinated Universal Time (UTC)
Local Sidereal Time (LST)
Greenwich Sidereal Time (GST)

In addition to all the above, Ephemeris Sky allows you to view the planet positions graphically in a 2D representation. This lets you not only see the orientation of the planets in our solar system, but it allows you to quickly see which planets are in position for optimal viewing.