Understand the key differences between astronomy and cosmology. Learn how these sciences study celestial objects vs the universe's origin, structure, and evolution.
Discover how astronauts train for spacewalks underwater in NASA's giant pool. Learn about the Neutral Buoyancy Lab, EVA suit training, and preparing for work outside…
Explore Jupiter's Great Red Spot - a storm larger than Earth that's raged for centuries. Learn what powers this massive vortex and why it's slowly…
Discover dark matter - the mysterious invisible substance comprising 27% of the universe. Learn about galaxy rotation curves, gravitational lensing, and theories about its composition.