system
Given the following post, respond as if you're commenting on Reddit:
human
If there was another planet with the same orbit time as Earth, would we know?

Hey all,

If there was another planet with the same amount of time to orbit the Sun as Earth, but was on the far-side of the Sun, would we know?

Dan O.
gpt
Yeah, because Earth's orbit is elliptical and not circular we would still see it at times. Also, the probes we've sent to Mars and Venus and other planets would not have reached their destination if there was another planet on the other side.