Earth’s interior
Structure, water and rock chemistry, magnetic-field power, and seismic signals from deep inside Earth.
8 problemsInside planets and stars
Composition, structure and internal dynamics of planets and stars.
Subjects: Planetary science · Earth science · Astrophysics
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Stellar explosions
How stars explode, what they leave behind, and where heavy elements form.
5 problemsStars and stellar remnants
Rotation, magnetic fields, cluster chemistry and the remnants of stellar evolution.
14 problemsPlanets and rings
Planet formation, atmospheres, thermal histories, distant orbits and Saturn’s moons and rings.
15 problemsProblems in this collection
6 problemsJupiter’s interior
Juno’s measurements suggest that Jupiter’s core blends gradually into its hydrogen-rich surroundings. How large is this region, what is it made of, and how did it form?
Earth’s core composition
Earth’s core is mostly iron and nickel, but these alone do not explain its measured properties. Which lighter elements are mixed in, and how are they distributed?
Uranus’s internal heat
Uranus does release heat from its interior, despite older claims that it does not. How does its interior lose heat and produce the seasonal energy budget we observe?
Solar modelling problem
Measurements of the Sun’s composition and interior do not all agree with standard solar models. Which changes would make the different lines of evidence fit together?
Solar dynamo
Where and how does the Sun regenerate the magnetic field underlying its activity cycle?
Saturn’s tidal dissipation
Saturn transfers spin to its moons, moving them outward. The strength and frequency pattern of this transfer point to unusually effective internal energy loss. Which interior processes set those rates and their evolution?