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I review some aspects related to the influence of planets on the evolution ofstars before and beyond the main sequence. Some processes include the tidaldestruction of a planet on to a very young main sequence star, on to a low massmain sequence star, and on to a brown dwarf. This process releasesgravitational energy that might be observed as a faint intermediate luminosityoptical transient (ILOT) event. I then summarize the view that some ellipticalplanetary nebulae are shaped by planets. When the planet interacts with a lowmass upper asymptotic giant branch (AGB) star it both enhances the mass lossrate and shapes the wind to form an elliptical planetary nebula, mainly byspinning up the envelope and by exciting waves in the envelope. If nointeraction with a companion, stellar or sub-stellar, takes place beyond themain sequence, the star is termed a Jsolated star, and its mass loss rates onthe giant branches are likely to be much lower than what is traditionallyassumed.

Planets, Planetary Nebulae, and Intermediate Luminosity Optical Transients (ILOTs)