Contents Welcome to Space Earth’s a Planet That’s Revolutionary Geocentric vs Heliocentric Where Is Uranus Planets Found and Kicked Out Finding a Planet Without Even Looking Search for Planet X Pluto Found in Pictures How Planet X Got Its Name Pluto the Shrinking Planet Pluto the Eccentric Planet Pluto’s Long-lost Brothers and Sisters Pluto’s Siblings Not Planets Pluto Not a Planet in New York So What Is a Planet What Astronomers Meant to Say Space Object Classification Guide What Is Pluto Then 1 7 13 15 16 18 20 23 25 27 30 32 35 41 47 52 54 55
Fast Facts About Pluto Postcard From Pluto What to Do If Your Grown-ups Fight Back Moons in the Solar System Nature of Science Number of Planets Throughout History Introducing Sedna Fast Facts About Sedna Planet Nine The New and Improved Solar System Time Line of Discovery What Type of Solar System Object Are You Test Your Grown-ups Sources Index Glossary Meet the Author 57 58 63 74 76 78 80 81 84 87 90 92 94 96 98 100 104
Welcome to Space Do your grown ups seem to be under the illusion they’re always in the right Do they think it’s always they who should be doing the teaching and you who should be doing the listening Well it’s time for a fresh approach especially when it comes to the cutting edge science of our solar system Before we begin this important education of your grown ups let me introduce myself I’m Dean and I’m an astronomer Being an astronomer is the greatest job in the universe I study everything from the Moon to the stars planets to galaxies comets and even the Sun And by working WOW Astronomer Dean Regas
