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Nebula
The definitive C++, Go, and Python reference. Explore, learn, and run — from foundations to the cutting edge.
Interactive Playground Galaxy Explorer Learning Paths
Real, runnable examples in C++, Go, and Python
Two Languages. One Reference.
Navigate C++ across 8 standards and Go across 5 topics — 835+ concepts in all.
C++ — by standard
Go — by topic
Built for Every Developer
From your first class to writing coroutines — CodeNebula has something for everyone.
Galaxy Explorer
Interactive 3D map of C++, Go, and Python concepts as star clusters. Navigate every concept visually.
Interactive Playground
Write and run C++, Go, or Python in your browser. Powered by GCC, Clang, Go, and CPython.
Instant Search
Full-text fuzzy search across every C++, Go, and Python concept. Press Ctrl+K from anywhere.
Learning Paths
Curated C++, Go, and Python journeys, from first steps to mastery. Track your progress.
Language Timeline
Visual history of C++, Go, and Python. See how each language evolved over decades.
Bookmarks & Progress
Save concepts to revisit. Track learning progress. Everything persists locally.
Ready to explore the galaxy?
Start with the interactive Galaxy Explorer or jump straight to the playground.