STEM Challenges
Explore fun and educational challenges across math, science, engineering, and coding!
Showing 6 of 209 challenges
Active Galactic Nuclei
Space ExplorerMost galaxies have a sleeping giant at their core — a supermassive black hole. But when one wakes up and begins feeding, it becomes an Active Galactic...
Measuring Galaxy Distances
Space ExplorerHow do astronomers know how far away a galaxy billions of light-years away really is? Discover the cosmic distance ladder — the brilliant chain of tec...
Dwarf Galaxies and Satellite Systems
Space ExplorerThe Milky Way is not alone — it is surrounded by a whole family of smaller satellite galaxies. Meet our nearest galactic neighbors, including the Mage...
Galaxy Interactions and Mergers
Space ExplorerGalaxies are not lonely islands drifting alone in space — they crash into each other in slow-motion cosmic collisions that reshape everything. Explore...
How Galaxies Form and Evolve
Space ExplorerGalaxies did not appear fully formed — they grew slowly from tiny seeds in the early universe. Explore the story of how the first galaxies emerged, ho...
Types of Galaxies
Space ExplorerThe universe contains hundreds of billions of galaxies, each a vast island of stars. Discover how astronomers classify these cosmic giants — from smoo...