Planet Fun2.1 - App Store

PlanetFun is a 4D solar system simulation (3D + time)
Sun, planets, Moon and star positions are calculated using
various astronomical methods.

App source code (Delphi Firemonkey) is available at:

https://github.com/omarreis/vsop2013

PlanetFun features:

* Solar system animation with configurable speed
* Set any local date and time
* Choose camera target (Sun, planets, etc)
* Configurable camera distance-to-target
* Touch gestures: one finger pan, two finger zoom, two finger rotation
* show planet orbits. Each orbit is represented by 52 dots (for Earth it is one dot per week)
* Heliocentric axis (x and z)
* VSOP2013 and VSOP87 planet position calculations
* Moon positions calculations ELP2000
* Star background image with 42455 stars of the Hipparcos Input Catalogue
* Star and constellation lines and names ( a celestial sphere image )
* Constellation drawings ( 31 constellations )
* actual 3D spheres for the 150 brightest stars
* Lighthouse on Earth on your GPS position
* phone in the scene is positioned according to phone sensors (Azimuth,Elevation,Roll)
* click the phone button to enter augmented reality mode.
* Almanac module allows exploring the ephemeris calculators (stars, planets, Sun, Moon, Earth)

controls:
* camera distance and angle of view.
* planet scales
* local time, time animation speed
* control visibility of various interface elements
* app uses sensors compass, gyro and GPS - requires permission

This app collects no user data.

Version History - Added program translations: French, Portuguese, Italian, Spanish
- Fixed phone model roll direction ( phone was rolling to the wrong side ) 2.1 08/11/2023 * Fixed near plane/far plane clipping, so nearby planets are not clipped
* moved Camera and Time editors out of the way ( to the top ) 2.0 06/14/2023 - constellation drawings on the sky background ( 31 constellations ) - set option in Visibility config 1.9 04/29/2023 * Fixed error in ecliptic obliquity ( introduced in v1.7 )
* Almanac module with various calculation engines: Planets VSOP2013, VSOP87. Star catalogs: Navigation and Hipparcos 150. Moon ELP2000.
* A selection of bright stars added as white 3d spheres. These are positioned on the surface of the celestial sphere ( at 200 AU )
* Click a 3D object to see object data (coordinates).
* Animated solar system diagram ( in the Almanac module ) 1.8 04/11/2023 * PlanetFun Almanac module with various calculation engines: Planets VSOP2013, VSOP87. Star catalogs: Navigation and Hipparcos 150. Moon ELP2000.
* A selection of bright stars added as white 3d spheres. These are positioned on the surface of the celestial sphere ( at 200 AU )
* Click a 3D object to see object data ( coordinates and calculations ).
* Animated solar system diagram ( in the Almanac module ) 1.7 04/07/2023 - Moon realistic positions ( based on Astronomical Algorithms )
- Toolbar for camera manipulation 1.4 11/07/2020 - Added two 3D objects: lighthouse and phone. These are positioned at user position using geographical coordinates (GPS)
- 3d phone attitude in the scene is controlled by phone sensors. Select phone as camera target to see the sky pointed by the phone ( augmented reality ) 1.3 10/28/2020 * Fixed Polaris position
* Config dialog was split in 3 smaller dialogs ( time, camera and visibility )
this improves interactive configuration.
* Changed axis from ecliptic to celestial reference.
* Textures moved to external files to simplify source code publication on github. 1.2 10/03/2020 * Sky star background now shows star names
* constellation lines and names
* 42455 stars of the Hipparcos Input Catalogue
* heliocentric axis ( RA and Decl ) 1.1 09/26/2020 1.0 08/16/2020