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What are the main goals of astrobiology research?
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Habitable zone
The habitable zones (green) for stars that are like the Sun (middle), hotter than the Sun (top), and cooler than the Sun (bottom). The red areas are those in which liquid surface water would be lost as a result of a runaway greenhouse effect, and the blue areas are those in which liquid surface water would be completely frozen.
Astrobiology is a multidisciplinary field that integrates biology, astronomy, and geology to investigate the nature and existence of life beyond Earth. The principal goals of astrobiology research are categorized into three main areas:1
- Understanding the conditions under which life can arise: Researchers study how life originates and survives, including the role of extremophiles that thrive in harsh environments. This includes defining the habitable zone—the orbital region around a star where a planet can maintain liquid water on its surface—and exploring alternative habitats, such as subsurface oceans on icy moons.12
- Looking for habitable worlds: Scientists search for extrasolar planets and analyze their potential to support life. This involves identifying Earth-sized worlds and using space-based telescopes to spectrally analyze their atmospheres for biosignatures like oxygen or methane.1
- Searching for evidence of life: This includes robotic exploration of bodies within our solar system, such as Mars, and the use of telescopic searches for extraterrestrial intelligence (SETI).1