Contains Ads

1.[Start] page is shown app is starting.Using the page ,you can change star list shown in [Star list] page.
Tapping [conditional list] button opens [Select star list]dialog.By selecting checkboxes on the dialog ,list of the stars that have planets with specific mass range is displays in [Star list] page.

2.[Star list] page has list of star with planet(s).
Tap the star you wish to search its planet ,then [Star's detail] page opens.

3. [Star's detail] page expresses data of the star and shows a image of the star and the sun for comparison of size.(When the data of star's radius is unknown,image of the sun is not shown.)
The star is drawn on upside of the image and the sun is shown on downside of the image when the screen is portrait.
Tapping the floating action button on lower right opens [Planet's orbit] page.

4.[Planet's orbit] page displays orbit(s) of planet(s) in the star system.
Swiping screen right and left or up and down ,you can see the orbits from different directions.
You can change the size of image by pinching in /out.
Tapping long on the screen shows [Select planet] dialog. If you select a planet,[Planet's detail] page opens and the data of the selected planet will be displayed.
You can also open the page by tapping the floating action button.

5.[Planet's detail] page explains the data(mass ,radius and so on)of each planet.
[Mass Class] item is same as in choices in [Select star list]dialog.

6.Swiping from left reveals the page menu . Tapping button(三) on left top in the action bar also shows the page menu.
You can open any page by tapping on the menu.

7.The planetary system's position in the sky can be displayed using app "StarAtlas"(after Ver1.8).

8.[Select star list]dialog can be shown from menu item "Change list".
About units used in [Star's detail] and [Planet's detail]

9."Help" item is added to action menu.

About units used in [Star's detail] and [Planet's detail]
・Msun :Mass of the sun
・Rsun :Radius of the sun
・pc :persec = about 3.26 light year
・au :astronomical unit
・Mj :Mass of Jupiter

Mass class in the app classifies planetary mass to 8 categories as follows.
Earth.... less than two times Earth mass
Super earth... two times Earth mass and over and less than 15 times Earth mass
Neptune...15 times Earth mass and over and less than 40 times Earth mass
Super neptune...40 times Earth mass and over and less than 90 times Earth mass
Saturn...90 times Earth mass and over and less than 300 times Earth mass
Jupiter...300 times Earth mass and over and less than 600 times Earth mass
Jupiter*2...600 times Earth mass and over and less than 3000 times Earth mass
Jupiter*10...3000 times Earth mass and over

The source of extrasolar planet data using in the app is [The Extrasolar Planets Encyclopaedia](URL:http://exoplanet.eu/).
(At May 29,2018)
Read more
1 total

What's New

Star list can be changed based on mass of the planets belong to the star.
"Help"item is added to Menu.
In the version ,you need to permit "android.permission.INTERNET".(for advertisement)
Read more

Additional Information

June 1, 2018
Current Version
Requires Android
4.0.3 and up
Content Rating
Offered By
©2019 GoogleSite Terms of ServicePrivacyDevelopersArtistsAbout Google|Location: United StatesLanguage: English
By purchasing this item, you are transacting with Google Payments and agreeing to the Google Payments Terms of Service and Privacy Notice.