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Showing 1–10 of 10 results
Advanced filters: Author: Jessie L. Christiansen Clear advanced filters

  • The past three decades have seen the number of known exoplanets grow by over three orders of magnitude. To mark the milestone, the Lead Scientist of the NASA Exoplanet Archive, Jessie Christiansen, looks at the history, the contents and the future of this community resource.

    • Jessie L. Christiansen
    Comments & Opinion
    Nature Astronomy
    Volume: 6, P: 516-519

  • Two double-sun exoplanets have been discovered by the Kepler spacecraft, establishing a new class of ‘circumbinary’ exoplanets and suggesting that at least several million such systems exist in our Galaxy.

    • William F. Welsh
    • Jerome A. Orosz
    • William J. Borucki
    Research
    Nature
    Volume: 481, P: 475-479

  • The authors report on a temperate Earth-sized planet orbiting the cool M6 dwarf LP 791-18 with a radius of 1.03 ± 0.04 R⊕ and an equilibrium temperature of 300–400 K, with the permanent night side plausibly allowing for water condensation.

    • Merrin S. Peterson
    • Björn Benneke
    • Thomas Barclay
    Research
    Nature
    Volume: 617, P: 701-705

  • Stellar data from the Kepler spacecraft are used to infer the existence of a sub-Mercury-sized exoplanet, the smallest yet discovered, in orbit around a Sun-like star.

    • Thomas Barclay
    • Jason F. Rowe
    • Susan E. Thompson
    Research
    Nature
    Volume: 494, P: 452-454

  • A giant planet candidate roughly the size of Jupiter but more than 14 times as massive is observed by TESS and other instruments to be transiting the white dwarf star WD 1856+534.

    • Andrew Vanderburg
    • Saul A. Rappaport
    • Liang Yu
    Research
    Nature
    Volume: 585, P: 363-367

  • A 4.8σ exomoon candidate is found around gas giant Kepler-1708 b, which orbits at 1.6 au around its star. It is the only candidate from a dedicated survey that analysed 70 cool giant exoplanets discovered by Kepler. Kepler-1708 b-i has a radius of 2.6 Earth radii and orbits its planet at 12 planetary radii.

    • David Kipping
    • Steve Bryson
    • Alex Teachey
    ResearchOpen Access
    Nature Astronomy
    Volume: 6, P: 367-380

  • When an extrasolar planet passes in front of its star (transits), its radius can be measured from the decrease in starlight and its orbital period from the time between transits. This study reports Kepler spacecraft observations of a single Sun-like star that reveal six transiting planets, five with orbital periods between 10 and 47 days plus a sixth one with a longer period. The five inner planets are among the smallest for which mass and size have both been measured, and these measurements imply substantial envelopes of light gases.

    • Jack J. Lissauer
    • Daniel C. Fabrycky
    • Jason H. Steffen
    Research
    Nature
    Volume: 470, P: 53-58

  • LTT 9779 b is Neptune-sized planet rotating around its star with a period of 0.79 days and an equilibrium temperature of 2,000 K. It is not clear how it retained its atmospheric envelope, which contains ~10% of H/He, as it should have been photoevaporated by now.

    • James S. Jenkins
    • Matías R. Díaz
    • Andrew W. Mann
    Research
    Nature Astronomy
    Volume: 4, P: 1148-1157