Best Planetarium Alternatives & Competitors in 2025

Real-time 3D visualization of space.

Key Celestia features:

Open Source Realistic 3D Views Cross-Platform Extensible

Open Source

Stellarium is a free open source planetarium for your computer.

Key Stellarium features:

User-Friendly Interface Realistic Sky Simulation Extensive Database Open Source

Open Source

FlexiQuiz is a powerful online test generator that enables you to create engaging online quizzes, tests, or exams in minutes. Choose from 100's of features to create a customized quiz that meets your objectives for business, education, or fun. .

Key FlexiQuiz features:

Question bank Groups Courses Add media

Try for free freemium $25.0 / Monthly (Essentials plan)

3D model of the Solar System and night sky in real time.

Key Solar System Scope features:

Educational Resource User-Friendly Interface Detailed Visualizations Accessibility

Aladin is an interactive sky atlas allowing the user to visualize digitized astronomical images or...

Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...

Key Sky Map features:

Open Source Free to Use Educational User-Friendly Interface

Google Earth Pro allows you fly anywhere around the earth to view satellite imagery, maps, 3D building, and terrain, from galaxies in outer space to the canyons of the ocean.

Key Google Earth Pro features:

High-Resolution Imagery Historical Imagery GIS Data Import Measurement Tools

Stellarium is a planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free. Read more about Star Chart.

Key Star Chart features:

User-Friendly Interface AR Compatibility Comprehensive Database Offline Availability

Solar Walk is a 3D model of our solar system, bringing the universe to the palm of your hand.

World Wind permits any client to zoom from satellite height into wherever on Earth, utilizing great determination Landsat symbolism and SRTM rises information to experience Earth in outwardly beautiful 3D, pretty much as though they were truly there.

Key NASA World Wind features:

Open Source Comprehensive Data Cross-platform Support Developer Support

SkEye is an advanced Planetarium that can also be used as a PUSHTO guide for telescopes.

KStars is a Desktop Planetarium for KDE.

Key KStars features:

Open Source Cross-Platform Comprehensive Features Educational Tool

A window to the stars has never been more beautiful and easy to use.

Key Sky Guide features:

User-Friendly Interface Augmented Reality Offline Capability Detailed Information

SkyView is powerful, easy-to-use app that answers questions about stars, constellations, and more.

Key SkyView features:

User-Friendly Interface Augmented Reality Offline Mode Comprehensive Database