Discover the thermal, power, radiation, and life-support systems that let spacecraft operate in the harsh environment of space.

Learn how stellar spectra reveal the chemical elements, temperature, and motion of stars using absorption and emission lines.

Space missions cost so much because rockets, safety systems, testing, labor, and launch reliability all add up fast.

Discover how astronomers detect newborn stars, from infrared telescopes and radio surveys to star-forming regions hidden by dust.

Learn what a variable star is, why its brightness changes, and how astronomers use these stars to study the universe.

Black holes are powerful, but they do not vacuum up the universe. Learn why distance, gravity, and orbital motion keep most matter safe.

Distant galaxies act as time capsules, showing how the universe formed, evolved, and built the elements and structures we see today.

Learn what supermassive black holes are, how they form, and why they are central to galaxy evolution, active galactic nuclei, and modern astronomy.

Learn how Mars rovers move, power themselves, navigate terrain, and carry out science on the Red Planet.

Explore the engineering, materials, and life-support systems needed to build safe, long-lasting human habitats on Mars.