- Update to 0.21.0:
* Added accurate planet axis orientation and rotation
* Added lunar libration (GH: #877)
* Added lines for the Invariable Plane and Projected Solar Equator
* Added solar altitude to planetary feature nomenclature
* Added describe planetary coordinates and changes in the nomenclature
display into Stellarium User Guide
* Added new language: Spanish (Latin America)
* Added ability to scaling of Sun and planets (GH: #1263)
* Added new magnitude algorithms for planets from Mallama&Hilton 2018
* Added Earth shadow circles for topocentric observer (GH: #430)
* Added new 4k texture for the Moon
* Added lower limit for aFOV parameter of ocular in the GUI to avoid
input wrong data
* Added visibility of an antisolar point for other planets
* Added ability to get all designations of DSO in scripts
* Added ability to show hourly motion in decimal degrees
* Added more cardinal points (GH: #1522, #1529)
* Added ability to switching off drawing of Solar glare
* Added a new sky culture based on Al-Sufi
"Book of Fixed Stars" written ~ 964 AD
* Added Old Hindu calendars
* Added Islamic (algorithmic) and Hebrew calendar.
* Added French Revolution calendar (arithmetic version)
* Added Persian (arithmetic) calendar
* Added button to set standard atmosphere
* Added ability to translation/transliteration of Roman (latin) terms
* Added ability to use UTC time when navigational stars are displayed
* Added acknowledgment section into Help/About window (GH: #1568)
* Added cosmetic fix for radio communication data: no need extra