Life in the Universe

Any search for life in the universe requires that scientists develop and agree upon a basic definition of what life is. For example, according to contemporary exobiologists and biophysicists, life (in general) can be defined as a living system that exhibits the following three basic characteristics: First, a living system is structured and contains information; second, an entity that is considered alive must be able to replicate itself; third, a living system experiences few random changes in its information package—which random changes when they do occur enable the living system to evolve in a Darwinian context (that is, survival of the fittest).

The history of life in the universe can be explored in the context of a grand, synthesizing scenario called cosmic evolution. This sweeping scenario links the development of galaxies, stars, planets, life, intelligence, and

The scenario of cosmic evolution provides a grand synthesis for the long series of alterations of matter and energy that have given rise to the Milky Way galaxy, the Sun, planet Earth, and human beings. (NASA [from the work of Eric J. Chaisson])

Origin of Matter

Present

Origin of Life on Earth

Formation of Earth

Origin of Matter

Present

Origin of Life on Earth

Formation of Earth

Irtfobase Publishing

Formation of Milky Way

Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

Get My Free Ebook


Post a comment