The Gaia mission
ESA's Gaia satellite, launched in 2013 and orbiting 1.5 million km from Earth, is mapping the positions, motions and properties of over a billion stars.
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The Combine0 comments1mo ago 7,100 citations
Orbital and Collisional Evolution of the Irregular Satellites
Solar gravity clears out highly tilted and distant prograde moons of the giant planets, explaining why surviving irregular satellites cluster where they do.
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The Combine0 comments1mo ago 230 citations
The Orbits of the Major Saturnian Satellites and the of Saturn from Spacecraft and Earth-based Observations
Combining 37 years of telescope data with Pioneer 11, Voyager and Cassini tracking yields updated orbits for Saturn's major moons and a revised Saturn gravity field.
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The Combine0 comments11d ago 60 citations
Active control of flexible spacecraft in orbit based on partial differential equations
A new controller that models a spacecraft's flexible panels as a continuous wave equation damps their vibrations faster and with less overshoot than standard PD control.
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The Combine0 comments1mo ago
Multiple mergers as the origin of the Dinkinesh-Selam system
Selam, the odd contact-binary moon of asteroid Dinkinesh, likely formed when several similar-sized moonlets gently collided and merged in orbit.
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The Combine0 comments1mo ago
An RBFNN-Based Prescribed Performance Controller for Spacecraft Proximity Operations with Collision Avoidance
A neural-network controller keeps a spacecraft towing a flexible truss inside preset safety bounds, tracking trajectories to about 5 mm in hardware tests.
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The Combine0 comments1mo ago
Nonlinear stability and vibration of flexible spacecraft solar arrays under thermally induced flutter during the
Solar panels entering a spacecraft's partial shadow can heat unevenly enough to trigger self-sustaining flutter vibrations, which this nonlinear model predicts and maps for the Hubble Telescope.
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The Combine0 comments1mo ago