Astrobiology is the scientific field that studies the possibility of life beyond Earth.

Mars is considered the most likely place to harbor life beyond Earth due to its proximity to Earth, its past geological activity, and the presence of water.

A habitable planet is a planet that has the right conditions to support life, including a stable temperature, liquid water, and an atmosphere.

Exobiology is the scientific method that involves searching for signs of past or present life on other planets or celestial bodies.

Protobionts are hypothetical first self-replicating molecules that may have given rise to life on Earth.

The transit method is an astronomical technique used to detect exoplanets by observing the dimming of a star's light as the planet passes in front of it.

Panspermia is the hypothesis that life on Earth originated from material that came from outer space.

Venus is considered the most extreme environment in our solar system, with a surface temperature of over 450 degrees Celsius.

Abiogenesis is the hypothetical process by which life could arise from non-living matter.

The Viking Program was a space mission designed to search for signs of life on Mars.

Directed Panspermia is the hypothetical process by which life could be intentionally spread from one planet to another.

The Galileo Mission was a space mission designed to search for signs of life on Europa, a moon of Jupiter.

Cosmic Ancestry is the hypothetical process by which life could arise from non-living matter in the universe.

The Cassini-Huygens Mission was a space mission designed to search for signs of life on Titan, a moon of Saturn.

Panspermia is the hypothetical process by which life could spread from one planet to another through natural means.