Astrobiology
Summary
Astrobiology investigates the origin, evolution and distribution of life in the universe by integrating astronomy, planetary science, geology, chemistry and biology. It seeks to understand how simple organic compounds assembled into the molecular systems that underpin living cells, how environmental factors such as liquid water, energy sources and chemical composition govern habitability, and how life might be detected beyond Earth. Research ranges from laboratory simulations of prebiotic chemistry and telescopic surveys of exoplanet atmospheres to robotic exploration of Solar System bodies and analysis of returned samples. By treating life as a universal phenomenon, astrobiology not only guides the search for life-bearing worlds but also deepens our understanding of Earth’s biosphere and its future trajectories.
Research from Nature Portfolio
Analysis of material returned from the near-Earth carbonaceous asteroid Ryugu has confirmed the presence of uracil, a key RNA nucleobase, alongside nicotinic acid derivatives. Variations in uracil abundances among fragments indicate radiation-driven alteration prior to delivery and underscore the prevalence of nucleobases in primitive asteroidal matter. At Jezero crater on Mars, in-situ fluorescence and Raman measurements have revealed aromatic organic molecules preserved within clay and carbonate minerals, demonstrating that ancient aqueous settings can trap and protect carbon-rich species for billions of years. Cassini’s investigation of Enceladus plume grains identified sodium phosphates, showing that phosphorus—vital for biological systems—is readily available in the moon’s subsurface ocean under alkaline, hydrothermal conditions and linking ocean chemistry to observable plume composition.
Astrobiology publication trend
The graph below shows the total number of articles in astrobiology across all publications each year (not limited to Nature Index journals).
Technical terms
Biosignature: A measurable chemical or morphological feature that provides evidence of past or present life.
Prebiotic molecule: An organic compound capable of participating in chemical pathways leading to the emergence of life.
Carbonaceous asteroid: A primitive minor planet rich in carbon-bearing compounds, important for understanding early Solar System organics.
Polycyclic aromatic hydrocarbon (PAH): An organic molecule made of fused aromatic rings, widespread in interstellar and circumstellar environments.
Cryovolcanism: The eruption of volatile liquids or vapours (for example water or ammonia) from an icy planetary body, creating plumes or surface deposits.
References
- Uracil in the carbonaceous asteroid (162173) Ryugu. Nature Communications (2023).
- Diverse organic-mineral associations in Jezero crater, Mars. Nature (2023).
- Detection of phosphates originating from Enceladus’s ocean. Nature (2023).
- Re-exploring Molecular Complexity with ALMA (ReMoCA): interstellar detection of urea. Astronomy & Astrophysics (2019).
- Discovery of Interstellar 2-Cyanoindene (2-C9H7CN) in GOTHAM Observations of TMC-1. The Astrophysical Journal Letters (2022).
- In situ analysis of surface composition and meteorology at the Zhurong landing site on Mars. National Science Review (2023).
- What Is Astrobiology?.
About these summaries
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