The Search For Life In The Universe main content.

The Search For Life In The Universe

Part of Hall of the Universe.

Panoramic view of the Museum's Hall of the Universe, with the glass ecosystem sphere in view. © AMNH/D. Finnin

Exhibition Text

In the search for life, we have barely scratched the surface of other planets in our solar system. And we have studied only a tiny fraction of planetary systems around other stars. No life has been found, but the potential for life is widespread. The chemical building blocks for life on Earth exist in the interstellar clouds that give birth to stars. Many stars have planets. There could be billions of habitable planets in our galaxy. Yet we do not know how life arises, or if it can easily evolve to intelligence. Life may be plentiful - the only way to find out is to search.

How do we find other planets?

For life in the universe to be abundant, planets must be abundant. But planets are hard to detect because they are small, and much fainter than the stars they orbit.

How does life begin? 

Scientists do not yet know how the first living things arose on Earth. The geological record shows that life appeared on Earth almost as soon as the young planet was cool and stable enough for living things to survive. This suggests that life may exist wherever conditions allow it. 

The chemical building blocks of life, such as amino acids, are easily made by su