Switch images

Tap the "mode switch button" to change the displayed image.
[Sun, earth and moon illustration]
It is a view from the top of the earth's orbit.
You can change the angle by flicking up and down.
By changing the inclination of the earth's axis and the position of the earth, it is possible to visually observe that the sunshine hours change depending on the season.
[Earth and moon illustration]
View from above of the moon's orbit
It is a figure that makes it easy to understand how the sunlight hits the moon. The red pin is the observer's position on Earth.
[Celestial sphere]
Conceptual diagram centered on observers on the earth
This is a diagram that makes it easy to understand the position of the sun and moon, and the direction from the observer's perspective.
It is possible to change the direction by flicking left and right, and change the distance from the observer to the camera by flicking up and down.
If the sun is above the horizon, the sky will be bright.
It is the state closest to the observer in the celestial sphere.
It feels like looking up at the sky.
[Moon illustration]
Illustration of the moon seen from above the earth
You can observe the actual phases of the moon.
[Change to 2 screens]
Tap the down button.
There will be 2 screens.
To display the operation screen, tap the up button.

Change speed

You can change the speed of star movement by operating the slider on the upper left.
(When operating the lower dial, operate in the stopped state.)
[Play/Stop]Switch with tap
[Fast forward]Swipe right
[Rewind]Swipe left

Operate the position of the star

Select the answer you want from "Moon phases" "Solar position" "Moon position".
The dial of the selected item cannot be operated.
[Moon phases dial]
Represents the shape of the moon as seen from the earth.
The upper side is the full moon and the lower side is the new moon.
[Solar position dial]
Indicates the position of the sun.
The left side is east, the upper side is culmination, and the right side is west.
[Moon position dial]
Indicates the position of the moon.
The left side is east, the upper side is culmination, and the right side is west.
[Season dial]
Represents the orbital position of the earth.
The lower right is spring equinox, the upper right is summer solstice, the upper left is autumn equinox, and the lower left is winter solstice.


Click the setting button to open the setting screen.
Click the close button to close the setting screen.
Change the latitude and longitude of the observer. Tap the button to display the map.
Move the pin by tapping the observer's position on the map.
The location information will be changed by tapping the ok button.
Tap the margin to close the map screen.
Switching English and Japanese
[Text display]
Display/non-display of supplementary characters
[More Apps]
Other apps created by Digital Gene
Link to this help page