Decades of space exploration have yielded countless claims of "first contact" with extraterrestrial life, but humanity's biggest question remains: Are we alone in the universe?

Ancient cultures like the Egyptians and Greeks pondered the existence of aliens and other worlds centuries before the modern search began. In recent times, scientists and researchers have used telescopes, satellite systems, and spacecraft to search for extraterrestrial life. But all we still have are signs.

Searching for Life Beyond the Stars

But from what it looks like, humanity may be taking the first significant steps toward discovering alien life through a new body of knowledge called astrobiology.

From the Greek word astron, or "star," astrobiology is a multidisciplinary field of science that seeks to understand the origins, evolution, and distribution of life in the universe, seeking life beyond the stars.

Experts at the University of Washington say that the field includes many different types of science, such as biology, astronomy, chemistry, geology, atmospheric science, oceanography, and aeronautical engineering.

Astrobiology seeks to address the questions of how, where, and whether life originated on Earth and is present elsewhere in the universe. If "first contact" ever happens in the future, the chances are it will be with an astrobiologist.

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Astrobiologist: What's in the Job?

The search for extraterrestrial intelligence is an important aspect of astrobiology (SETI). SETI Institute astronomers are searching for radio signals that could indicate the existence of life elsewhere in the universe. They also look into how life began on Earth and evolved.

The search for life beyond Earth is a crucial area of study in astrobiology. Astrobiologists may be experts in biology, but they may also be trained in various other scientific disciplines, such as astronomy and chemistry.

Soon, these individuals may be able to answer questions such as:

• What kind of environment do alien living organisms require to survive?
• What are the limits of these environments?
• What kind of "extremes" could life still exist in?
• What shape would life take on another world?
• What clues would indicate a planet is habitable.

But most of the time, some answers are already available here on Earth.

According to a Space.com article, astrobiologists may study the most basic forms of life on Earth or those that can survive in harsh environments like high pressures and extreme temperatures. They can now consider whether these organisms could endure in space or on an alien planet's harsh environment. A lot more hypotheses can spring from that.

Astrobiology Today

NASA has made significant contributions to the field of astrobiology. In 1959, the space agency launched its first astrobiology mission, initially referring to the field as "exobiology."

NASA also created an instrument to search for signs of microbial life in extraterrestrial environments, which led to the establishment of NASA's life sciences program.

The space agency is still conducting astrobiology research today, including missions to Mars, Europa, and Enceladus to look for signs of past or present life.

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