Exoplanets and Fermi paradox: can we ever get an answer from other civilizations?

"Main) The dense star cluster Omega Centauri as seen by the La Silla Observatory; (inset top) an intermediete mass black hole; (inset bottom) a cluster of stellar mass black holes. (Image credit: ESO/Robert Lea)" (LiveScience, Missing link' black hole found? Not so fast, new study says) The intermediate-mass black hole in Omega Centauri is only the stellar-mass black hole cluster. That thing means that the intermediate-mass black hole waits for its finder. The intermediate-mass black holes might be far rarer than nobody imagines.  When the black hole collides with another black hole it raises its mass. That means the intermediate-mass black hole can be the intermediate stage for the black hole.  If an intermediate-mass black hole exists its event horizon area versus volume is far smaller than in a stellar-mass black hole. That means intermediate-mass black hole vaporization is slower than stellar-mass black hole. That thing causes a situation in the intermediate-mass blac...

The antigravity can be the "dark energy".  That means the gravity wave's wavelength can change when it hits some other gravity wave or quantum field. If that wavelength changes the gravitational effect of that (gravity) wavelength ends.  Is the wavelength transformation in gravity waves the reason for the effect called dark energy? Maybe gravity waves can transform into X-or gamma rays and that is the thing called dark energy or "antigravity".  The term "antigravity" can mean a situation where a gravity wave's wavelength changes. If the gravitational- or gravity wave's wavelength changes.  That means that. When a gravity wave's wavelength changes gravity wave is not a gravity wave anymore.  So if a gravity wave can transform or stretch to the gamma- or X-ray that explains dark energy. The simplest way to think about that thing is that dark energy can be a gravitational wave that impacts something. And that turns the gravitational waves into...