space exploration

Hi friends, There is a thought process that intrigues me. If light reflected from earth reaches a blackhole farther that formation of eath lightyear distance. Slingshot the ray back to earth, and on earth we somehow capture those radiation. Assuming signal lost is very low somehow. Any comment...

I’m a writer and currently writing a book that involves space travel to a potentially habitable planet. I’ve done lots of research of potentially habitable planets that we are already aware of and I am aware that scientists believe there to be billions of planets in the Milky Way alone. What...

Hi everybody, I read that laser propulsion could, in future, propel spaceships without carrying enormous mass of fuel. And some beams of X-rays coming from space match such a propulsion of a theoretical extraterrestrial civilization (but natural explanations are possible). Now, as fair as I...