Waldo Dickinson 
Discover how planetary defense science protects Earth. Explore the physics of NASA’s historic DART asteroid deflection mission and early warning surveillance networks.
Explore the breakthrough physics of Nuclear Thermal Propulsion (NTP). Discover how fission reactors will propel crewed astronaut missions to Mars in under 100 days.
Discover variable star astronomy. Learn how amateur observers estimate stellar magnitudes and contribute invaluable photometry data directly to professional astrophysics databases.
Learn how to master manual celestial navigation. Discover how to use bright guide stars, asterisms, and star hopping techniques to find deep sky objects without digital telescope apps.
Master the art of nightscape astrophotography. Learn optimal camera shutter exposure rules, ISO settings, star trackers, and dark-sky planning to capture the Milky Way core.
Discover the Cosmic Microwave Background (CMB) radiation. Learn how faint ancient photons from 380,000 years after the Big Bang reveal the age, geometry, and evolution of our universe.
Explore gravitational wave astronomy. Learn how laser interferometers at LIGO measure ripples in spacetime smaller than the width of a proton to detect colliding black holes.
Explore the terrifying physics of neutron stars, spinning pulsars, and magnetic magnetars. Learn what happens when massive stellar cores collapse into atomic nuclei the size of a city.
A complete, uncompromising safety guide to observing the Sun with telescopes. Discover the differences between White Light solar films and Hydrogen-Alpha dedicated optics.
Discover why Dobsonian telescopes remain the undisputed kings of visual stargazing. Learn about aperture-to-cost ratio, rocker box mechanics, and how to choose the right size.
Chief Astronomy & Optics Editor sharing telescope buying guides, deep space discoveries, and stargazing techniques.
