Hi John,
Play the video in the link below. Here are a couple of key statements in the article below:
· But since all of this is moving, speed is relative.
· As Elon Musk said on Twitter, this video "makes it clear that you can only sense acceleration, not velocity."
Thanks for the kind words.
Blessings to you.......
https://www.businessinsider.com/earth-screaming-through-space-nasa-animated-video-2019-10?op=1