How are planets detected in other solar systems?
Google NASA or astronomy,, “extra solar planets” everything we know about the universe outside our solar system, and most of what we knew before 1970, is by the light or other rays reaching our telescopes We know about light form our laboratories, Electricity and magnetism and and LOTS of MATH that we can be very sure of light can tell us: how hot a thing is, what chemicals are in it and how it is moving very sensItive space telescopes can tell large planets are moving around a star by very tiny “wiggles” in the motion of the stars recently they have been able to see the tiny change in brightness as a planet passes between us and the star. a very small effect so far no one has actually seen the planet.
