Knowra Planetary science Planetary science Planetary science studies planets, moons, small Solar System bodies, and planetary systems, including their origins, composition, atmospheres, surfaces, and evolution.
Planetary formation : The processes by which planets develop from gas, dust, and smaller bodies around stars. It explains how planetary systems acquire their basic architecture.
Planetary exploration : The investigation of planets and other planetary bodies using spacecraft, telescopes, and laboratory analysis. It is the broad practice through which planetary science gathers evidence.
Mars : The fourth planet from the Sun, a rocky world with a thin atmosphere and evidence of ancient liquid water. Its geology and climate history make it a central target for surface exploration.
Astrobiology : The study of the origin, evolution, distribution, and potential existence of life in the universe. Planetary environments provide settings for assessing habitability and possible biosignatures.
Origin of life : The set of scientific questions about how life first emerged from nonliving matter. Planetary environments constrain where and under what conditions life could begin.
Planetary differentiation : The separation of a planetary body's materials into layers according to density and chemical affinity. It links interior composition to planetary history and magnetic properties.
Planetary rover : A mobile robotic spacecraft designed to travel across the surface of a planetary body. Rovers analyze rocks and terrain directly, as on Mars.
Venus : The second planet from the Sun, with a dense carbon-dioxide atmosphere and an extremely hot surface. Its runaway greenhouse climate tests models of planetary atmospheres.
Astrophysics : The application of physical principles to celestial objects and phenomena. It supplies theories of stars, radiation, and planetary systems at large scales.
Ocean world : A planetary body with a substantial liquid-water ocean beneath or at its surface. These worlds raise questions about ocean chemistry, energy sources, and habitability.
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