C.A. Beichman

The TESS-Keck survey. II. An ultra-short-period rocky planet and its siblings transiting the galactic thick-disk star TOI-561

E. J. Gonzales, A. Fukui, J.N. Winn, Daniel Huber et autres

We report the discovery of TOI-561, a multiplanet system in the galactic thick disk that contains a rocky, ultrashort- period planet. This bright (V = 10.2) star hosts three small transiting planets identified in photometry from the NASA TESS mission: TOI-561 b …

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An ultrahot Neptune in the Neptune desert

R. Vanderspek, G. Ricker, J.N. Villaseñor, S. Gill et autres

About 1 out of 200 Sun-like stars has a planet with an orbital period shorter than one day: an ultrashort-period planet1,2. All of the previously known ultrashort-period planets are either hot Jupiters, with sizes above 10 Earth radii (R⊕), or apparently rocky …

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Exploring the universe - The origins of planets, stars and galaxies

C.A. Beichman

The missions related to NASA's Strategic Plan and other missions are reviewed that address fundamental cosmological issues regarding the origins of celestial objects. Study of the primordial solar system is addressed by the Comet Rendezvous and Flyby spacecraft and the IRAS; the …