What is a black hole? How do we know that stars and galaxies are billions of years old? What is the difference between stars and planets? Glenn Murphy, author of Why is Snot Green?, answers these and a lot of other brilliant questions in this funny and informative book.

Packed with doodles and information about all sorts of incredible things, like supermassive black holes, galaxies, telescopes, planets, solar flares, constellations, eclipses and red dwarfs, this book contains absolutely no boring bits!

This book is part of a book series called Science Sorted .

This book has been graded for interest at 7-9 years.

There are 280 pages in this book. This book was published 2013 by Pan Macmillan .

Mary Murphy is the author and illustrator of many books for young children, including "I Like It When. "and" Some Things Change. " She lives in Dublin, Ireland.