i don't know why this popped into my head this morning.
i've read lots of articles about what might happen if a large asteroid were to strike earth, and a BAUT podcast that speculated that our own moon may have been formed by a collision with another large body that knocked the future moon chunks into orbit around Earth.
BUT, for some reason today i'm wondering what would happen if an extremely large asteroid struck one of the other planets, like maybe Venus or Mars. could either planet's orbit be significantly disturbed? and if so, could it in turn significantly affect Earth's orbit?