You can count numbers all around you, from the eight legs on a spider to the one nose on your face. But can you count the stars in the sky? Explore SPACE in THE BIG COUNTDOWN from galaxies and stars to the planets in our solar system, including Earth, and our own satelite, the Moon. The Big Countdown looks at popular topics and investigates the great many numbers that make them fascinating. From the mind-bogglingly large to smallest and most precious, this series helps us understand that it's not just our days that are numbered.