PLANET EARTH NATIONAL GEOGRAPHIC EARTH HOME PLANET THE ONLY PLANET SOLAR SYSTEM HARBOR THINGS NEED TO SURVIVE THIN LAYER ATMOSPHERE SEPARATES VOID MADE UP INTERACTIVE SYSTEMS CREATE CHANGING OUR SOLAR SYSTEM JOIN SCIENTISTS EMBARK JOURNEY MYSTERIES HEAR EXPERT DECIDE YOURSELF VIEWING UNIQUE PERSPECTIVE SPACE THE OPPORTUNITY SATELLITES MARS ROVER THE PLANET THE SOLAR SYSTEM FAST FACTS THE THIRD THE SUN FIFTH LARGEST MILES AWAY FROM THE SUN DIAMETER HUNDRED KILOMETERS FOUR SEASONS OF EARTH AXIS OF ROTATION LENGTH 365 DAYS LENGTH OF A DAY 23 HOURS OCEANS DEEP COVER NEARLY PERCENT MINIMUM WEATHER TEMPERATURE DEGREES FAHRENHEIT DEGREES CELSIUS MAXIMUM FRESH WATER LIQUID PHASE SPAN 100 DEGREES FULL RANGE TEMPERATURES DEGREES FARENHEIT DEGREES CELCIUS PRESENCE WATER VAPOR THE ATMOSPHERE RELATED STORIES SEA LEVEL RISE FLOOD HUNDREDS OF CITIES THE NEAR FUTURE LARSEN C ICE SHELF COLLAPSE JUST THE BEGINNING MELTING CHINESE YOUTH TOWARD WILDLIFE PROTECTIVE ATMOSPHERE THE SURFACE OCEAN INGREDIENTS CLIMATE LOCAL SHIELDS HARMFUL RADIATION METEORS REVEALED UPPER ACTUALLY SWELLS CONTRACTS BY NIGHT SOLAR ACTIVITY OUR PLANET RAPID SPIN CORE GIVE RISE MAGNETIC SOLAR WIND DISTORTS TEARDROP STREAM CHARGED PARTICLES MAGNETIC FIELD FADE VIEW IMAGES THE SILHOUETTE WOMAN SEEN NORWEGIAN ISLAND BENEATH THE NORTHERN LIGHTS PHOTOGRAPH GARCIA GETTY IMAGES TRAPPED MOLECULES ABOVE BEGIN GLOW NORTHERN SOUTHERN LIGHTS COURTESY NATIONAL GEOGRAPHIC SOCIETY