** List of Observation Scenarios
+ Crescent Observation
https://youtu.be/JdoHzAH1AGc
+ Half Moon Observation
https://youtu.be/WPpvfXlMJt0
+ Geocentric model view
https://youtu.be/xxmMSk69N9M
+ Total Solar Eclipse
https://youtu.be/FAUIrYvrKbc
+ Motion of Jupiter and Saturn
https://youtu.be/7qB5Do-oabQ
+ Axial Tilt
https://youtu.be/3EqoGwQ19GE

** Overview
+ Planetarium used by holding the device up to the sky
+ Constellation clip arts based on the star maps of 1600 - 1800
+ By the horizontally launched sightseeing spaceship leaving the Earth
+ Inside the sightseeing spaceship see the view in the direction to hold the device
+ Confirm the relationship between the phases of the moon and the position of the sun the earth and the moon
+ Confirm the appearances and orbits of inner planets and outer planets
+ Observation of solar eclipse and lunar eclipse around the world
+ Radiant point display of the meteor shower in the activity period
+ Search for constellations stars planets etc
+ Display of artificial satellites that may be brighter than 2nd magnitude
+ Please try following with this application after forecasting.
- If the Earth's axis of rotation falls sideways what about the day and night? How do the seasons go?
- If the inclination of the earth's axis is 0 what about day and night? How do the seasons go? Where are the sunrises?
- If the Earth's rotation stops what about the day and night?
- If the Earth's revolution stops how do the seasons go?
- If the earth were the center of the universe the Ptolemaic system?
+ Astronomy application that students teachers parents children and grandchildren can enjoy together.