Here's why:
* We've found planets around other stars: Astronomers have discovered thousands of exoplanets (planets outside our solar system) orbiting other stars. Many of these stars are visible to the naked eye.
* Planets are common: The Kepler space telescope has shown that planets are incredibly common. Most stars likely have at least one planet orbiting them.
However, we can't directly see most exoplanets. They're too small and faint to be seen with our current telescopes. Instead, we use indirect methods like:
* Transit method: Detecting the slight dimming of a star's light as a planet passes in front of it.
* Radial velocity method: Detecting the wobble of a star caused by the gravitational pull of an orbiting planet.
So, while we can't be absolutely sure for every star, it's highly likely that many of the stars you see at night have planets orbiting them. It's a mind-boggling thought!
