KStars is an open source desktop planetarium for KDE.
It depicts an accurate simulation of the night sky, including stars, constellations, star clusters, nebulae, galaxies, all 8 planets, the Sun, the Moon, comets and asteroids. You can see the sky as it appears from any location on Earth, on any date.
The user interface is highly intuitive and flexible. The display can be panned and zoomed with the mouse, and you can easily identify objects and track their motion across the sky. KStars includes many powerful features, yet the interface is clean and simple and fun to use.
Key Features
- 130,000 stars to 9th magnitude.
- 13,000 deep-sky objects (Messier, NGC, and IC catalogs).
- Milky Way.
- 88 constellations.
- Guide lines such as the celestial equator, the horizon and the ecliptic.
- Control telescopes and cameras, using the elegant and powerful INDI protocol:
- Supports several popular telescopes including Meade’s LX200 family and Celestron GPS.
- CCD cameras, webcams, and computerized focusers.
- Interface to a number of tools with which you can learn more about astronomy and the night sky:
- Astrocalculator tool provides direct access to many of the algorithms the program uses behind the scenes, including coordinate converters and time calculators.
- AAVSO Lightcurve Generator tool will download a lightcurve for any of the 6000+ variable stars monitored by the American Association of Variable Star Observers (AAVSO).
- Plan an observing session using our Altitude vs. Time tool, which will plot curves representing the Altitude as a function of time for any group of objects.
- What’s Up Tonight? tool that summarizes the objects that.
you will be able to see from your location on any given night. - Solar System Viewer, which shows the current configuration of the major planets in our solar system.
- Jupiter Moons Tool which shows the positions of Jupiter’s four largest moons as a function of time.
- Context-sensitive popup menu.
- Provides an observation planner, a sky calendar tool, and an FOV editor to calculate field of view of equipment and display them
- Supports adjustable simulation speeds in order to view phenomena that happen over long timescales.
- KStars Astrocalculator to predict conjunctions.
Website: kstars.kde.org
Support:
Developer: Jason Harris, Heiko Evermann, Thomas Kabelmann, Pablo de Vicente, Jasem Mutlaq, Mark Hollomon
License: GNU General Public License v2.0

KStars is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| Astronomy Software | |
|---|---|
| Stellarium | A virtual planetarium |
| Gaia Sky | Astronomy visualization desktop and VR program |
| Celestia | Real-time space simulation |
| AstroImageJ | Tool for astronomical image analysis and precise photometry |
| Skychart | Prepare different sky maps for a particular observation |
| KStars | Desktop planetarium for KDE |
| OpenSpace | Interactive data visualization software |
| Aladin Desktop | Interactive sky atlas |
| Virtual Moon Atlas | Real-time moon observation |
| Ginga | FITS image viewer and toolkit |
| Digital Universe Atlas | Standalone 4-dimensional space visualization application |
| XEphem | Motif based ephemeris and planetarium program |
| mars-sim | General purpose simulator |
| Cosmonium | 3D astronomy and space exploration program |
| Tenmon | FITS and XISF image viewer, converter and indexer |
| Kosmorro | Calculate your ephemerides |
| Astra | Observatory control system |
| astroterm | Terminal-based star map |
| Skyviewer | Displays HEALPix-based skymaps |
| skyterm | Terminal-based astronomy program |
| ORSA | Framework for celestial mechanics investigations |
Read our verdict in the software roundup.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

