Genel olarak, dünyadaki suyun kuyrukluyıldızlarla çarpışmalardan geldiği düşünülür.
- It is generally thought that the earth's water came from collisions with comets.
Kuyrukluyıldız ve asteroitleri karıştırmayın.
- Don't mix up comets and asteroids.
... comet? No one understands comets, they're a mystery. They've been fascinating people ...
... every day with my reflecting telescope and the path of that comet conforms to my mathematics ...