4
Space Numbers
Our Solar System is made up
of eight major planets that
orbit one Sun. We live on
Earth, which only has one
Moon. But beyond this,
space soon makes us think
of really big numbers.
Talking
Billions
Scientists believe that the
Solar System has existed
for about 4.5 billion years,
and there are more stars
in the
Universe
than
grains of sand on all the
beaches on Earth. That’s
more than a billion trillion!
This book will take you on a
journey through the world of
numbers—from zero to
infinity
—demonstrating how we
use numbers and how math
shapes our world. To make
sense of really big numbers,
you need to relate them to
your everyday life.
Sun
Mercury
Venus
I
T’S
A
LL
A
B
O
UT
M
AT
H
!
