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Showing 1–3 of 3 results
Advanced filters: Author: M. Birlan Clear advanced filters
  • Asteroids are much 'redder' than meteorites (which come from asteroids); the accepted explanation is 'space weathering', though the actual processes and timescales involved have remained controversial. Vernazza et al. report observations of two young asteroid families, revealing that 'space weathering' must be a very rapid process, which favours solar wind implantation as the main mechanism; they further demonstrate an apparent weathering dependence on olivine abundance.

    • P. Vernazza
    • R. P. Binzel
    • M. Birlan
    Research
    Nature
    Volume: 458, P: 993-995
  • SPHERE at the VLT observed Hygiea, the fourth largest body in the main belt and the parent body of a big asteroid family, at unprecedented spatial resolution. Its unexpected spherical shape without any impact crater is explained by numerical simulations with a big impact that fluidized the body, reassembling it in a rotational equilibrium regime.

    • P. Vernazza
    • L. Jorda
    • J. L. Maestre
    Research
    Nature Astronomy
    Volume: 4, P: 136-141