Question: what are cool facts about space?
Answer: Space is completely silent. ...  The hottest planet in our solar system is 450° C. ...  There may be life on Mars. ...  Nobody knows how many stars are in space. ...  Halleys Comet won't orbit past Earth again until 2061. ...  A full NASA space suit costs $12,000,000. ...  Neutron stars can spin 600 times per second.