Solar System Field Notes

Why Comets Grow Tails Near the Sun

A comet develops its bright coma and tails as sunlight warms volatile material near the Sun. Follow the dust and ionized gas to see why the two tails behave differently a

How We Know Europa Has an Ocean Beneath Its Ice

Europa's hidden ocean cannot be photographed directly, but several lines of evidence point beneath the ice. Explore the magnetic measurements, surface geology and physica

What We Know About Jupiter's Great Red Spot

Jupiter's Great Red Spot is a vast, persistent storm observed across centuries, yet important questions remain. Explore what spacecraft and telescopes reveal about its wi

How Mars Preserves Ancient River Evidence

This episode explores Channels, deltas, minerals and sedimentary structures that record past flowing water. The story keeps the mechanisms clear and the research grounded

How Scientists Learn What Asteroids Are Made Of

This episode explores Spectra, meteorites, spacecraft measurements and the limits of remote interpretation. The story keeps the mechanisms clear and the research grounded

What Saturn's Rings Are Made Of

This episode explores Ring particles, gaps, orbital structure and how observations reveal their composition. The story keeps the mechanisms clear and the research grounde

Why Venus Has Such a Thick Atmosphere

This episode explores Composition, pressure, greenhouse warming and the evidence gathered by spacecraft and telescopes. The story keeps the mechanisms clear and the resea