No Atmosphere, Atmosphere, Greenhouse Gas Atmosphere

[jc456]

what is all the junk out in space? Does space debris enter the earth?

Yes indeed, many things hit the earth from outer space. You are probably not aware of it because cosmic rays are invisible to you. And meteorites seldom hit near you. Look for meteor shower alerts in the paper, go outside and you can see them for yourself. I hope this answers your question.

I already knew it thanks. It's why earth is not a closed system.

 

[Crick]

As far as mass transfer goes, however, the rate of change as a percent of the planetary mass, is absolutely microscopic.