Cosmic Collisions: Asteroid vs. Comet (EBook)
What happens when two massive hunks of hurtling space debris slam into each other? Welcome to round one in the Cosmic Collisions series—an exciting children’s debut from an expert astrophysicist.

Cosmic Collisions: Asteroid vs. Comet (Paperback)
What happens when two massive hunks of hurtling space debris slam into each other? Welcome to round one in the Cosmic Collisions series—an exciting children’s debut from an expert astrophysicist.

Cosmic Collisions: Asteroid vs. Comet (Hardback)
What happens when two massive hunks of hurtling space debris slam into each other? Welcome to round one in the Cosmic Collisions series—an exciting children’s debut from an expert astrophysicist.