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.