Read the November issue

This month we revisit the Drake equation, listen towards Proxima Centuri for technosignatures, look to a lensed supernova as a cosmological probe, and much more...

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  • The Zhurong rover has explored its landing site in Utopia Planitia, Mars, and is travelling south towards the highland–lowland boundary, focusing initially on the composition and physical properties of the rocks along the way.

    • Jianjun Liu
    • Chunlai Li
    • Hongbo Zhang
    Letter Open Access
  • The authors report time-series interferometric observations of a microlensing event from the ground. The lens images rotate during the series, giving the direction of motion of the lens and a very accurate Einstein ring radius. The lens is a 1.1-solar mass object at a distance of 5–6 kpc.

    • Arnaud Cassan
    • Clément Ranc
    • Olivier Wertz
    Letter
  • The 20-million-year-old, solar-type star V1298 Tau hosts a multiplanet system. The two outermost planets, gas giants with masses of 0.64 and 1.16 Jupiter masses, respectively, defy current formation models as their mass–radius relationship should be reached much later in the stages of planetary evolution.

    • A. Suárez Mascareño
    • M. Damasso
    • M. Mallonn
    Letter
  • Water and hydroxyl enrichment in the solar-wind-irradiated rim of an olivine grain from asteroid Itokawa suggests that its regolith could contain ~20 l m−3 of water from solar wind—a potential water source for airless planetary bodies.

    • Luke Daly
    • Martin R. Lee
    • Michelle S. Thompson
    Article
  • The resonant chain of the TRAPPIST-1 planets is dynamically fragile, as small perturbations during its lifetime would have disrupted it. N-body simulations show that the system could not have interacted with more than 0.05 Earth masses of material after its formation. Thus, any water in the planets must come from the planets’ original accretion.

    • Sean N. Raymond
    • Andre Izidoro
    • Simon L. Grimm
    Letter

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