Blog

Learn how telescopes collect light, magnify distant objects, and reveal detail with lenses, mirrors, and modern optical design.

Redshift reveals that distant galaxies are moving away, providing key evidence that the universe is expanding and helping astronomers measure its history.

Learn how astronauts prepare for weightlessness using aircraft, pools, simulations, and survival drills before entering space.

Learn the education, experience, fitness, and application steps needed to become an astronaut, plus the skills that improve your odds.

Learn how astronauts train for landing through simulations, emergency procedures, G-force preparation, and spacecraft-specific return drills.

Learn what a meteor shower is, how it happens, and the best ways to watch one with confidence.

Explore how astronomy uses observation, mathematics, and testable theories to explain the universe as a true science.

Explore how astronauts train for Mars through simulations, isolation, robotics, space medicine, and survival drills that prepare crews for deep-space flight.

A radio telescope detects invisible radio waves from space, revealing galaxies, pulsars, and cosmic gas that optical telescopes cannot see.

Learn what an astronomical unit is, how it is defined, its exact value, and why astronomers use it to measure the Solar System.