# Do inelastic or elastic collisions have any effect on a large bodies movement (like the Earth)

Recently read a question regarding the temperature of the CMB & one of the comments got me thinking...

From what I understand, collisions between subatomic particles and objects out in interstellar space affect the objects energy and movement. So I have assumed that similar collisions happen between larger bodies (such as Earth/Moon/sun) and the space around them. That said, is the movement of our Earth affected or changed in any measurable way? If the Earth loses enough energy from these collisions (over a very long period of time of course) could its orbital path eventually "collapse" and get sucked in towards the Sun"?

Or is some type of conservation of momentum still in play which keeps these bodies in their correct path?

-And please if you are going to downvote my question, provide a relevant explanation for it-