Comets: Why study them? What can they teach us about finding life beyond Earth?

Image of Comet 67P/Churyumov-Gerasimenko taken by the European Space Agency’s Rosetta spacecraft on Jan. 31, 2015. , and what this myriad of scientific disciplines can teach scientists and the public regarding the search for life beyond Earth.

Along with their spectacular displays, comets have been hypothesized to have brought the necessary ingredients to Earth for life to emerge in a process called panspermia, and some scientists evento disperse the ingredients for life throughout the Milky Way Galaxy. Regarding the ingredients, the European Space Agency’s Rosetta spacecraftthat comet 67P/Churyumov–Gerasimenko contained phosphorus, which is one of the most crucial ingredients for life to emerge.

Composite image of the surface of Comet 67P/Churyumov–Gerasimenko taken by the ESA Rosetta spacecraft’s OSIRIS instrument in 2016. , “Observations show us that comets carry the chemical building blocks of life, and those chemical species can also be found in exo-solar systems; they are ubiquitous. Many classes of organic compounds have been detected in comets, compounds that are also found in spectra of exo-systems.

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