space

Constellations Fermi Paradox Galaxies Planets Space Stars Zoo hypothesis The zoo hypothesis speculates on the assumed behavior and existence of technically-advanced extraterrestrial life and the reasons they refrain from Gravity well A gravity well or gravitational well is a conceptual model of the gravitational field surrounding a body in space — the more massive the body, the Face of Mars https://www.space.com/17191-face-on-mars.html Drake equation Dr. Frank Drake conceived an approach to bound the terms involved in estimating the number of technological civilizations that may exist in our The Overview effect The overview effect is a cognitive shift in awareness reported by some astronauts during spaceflight, often while viewing the Earth from outer