There are about 200 billion stars in our galaxy, with 40 billion of them like our sun, Marcy said. One of his co-authors put the number of sun-like stars closer to 50 billion, meaning there would be at least 11 billion planets like ours
Answer:
An individual would be unable to observe the changes in the rock cycle, which can last for tens of thousands or even millions of years.
<em>I hope this helps you</em>
<em>:)</em>
Are those suppose to be words?
