STEM Challenges
Explore fun and educational challenges across math, science, engineering, and coding!
Showing 6 of 156 challenges (filtered)
Nebulae
Space ExplorerNebulae are some of the most beautiful objects in the universe — glowing clouds of gas and dust that can mark the birthplaces or the graveyards of sta...
Giant Molecular Clouds and the Interstellar Medium
Space ExplorerThe space between stars is not empty — it is filled with a mix of gas and dust that becomes the raw material for new stars. Explore the interstellar m...
Binary and Multiple Star Systems
Space ExplorerMore than half of all star systems in our galaxy contain two or more stars. Binary and multiple star systems are not just fascinating to observe — the...
Spectral Classification
Space ExplorerEvery star leaves a fingerprint in its light. By spreading starlight into a spectrum, astronomers can read a star's temperature, composition, motion, ...
The Hertzsprung-Russell Diagram
Space ExplorerIn 1910, two astronomers independently discovered that stars are not randomly scattered by temperature and brightness — they fall into distinct groups...
Color, Temperature, and Luminosity
Space ExplorerA star's color is not just decorative — it directly reveals its surface temperature. And a star's brightness depends on both how hot it is and how big...