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  1. No Access

    Article

    Charon's size and an upper limit on its atmosphere from a stellar occultation

    Stellar occultations, when a Solar System object passes between us and a star and blocks its light, are eagerly awaited by astronomers as they provide a chance to make measurements that are not normally possib...

    B. Sicardy, A. Bellucci, E. Gendron, F. Lacombe, S. Lacour, J. Lecacheux… in Nature (2006)

  2. No Access

    Article

    Near-infrared flares from accreting gas around the supermassive black hole at the Galactic Centre

    Recent measurements of stellar orbits1,2,3 provide compelling evidence that the compact radio source Sagittarius A* (refs 4, 5) at the Galactic Centre is a 3.6-million-solar-mass black hole. Sgr A* is remarkably ...

    R. Genzel, R. Schödel, T. Ott, A. Eckart, T. Alexander, F. Lacombe, D. Rouan… in Nature (2003)

  3. No Access

    Article

    Large changes in Pluto's atmosphere as revealed by recent stellar occultations

    Pluto's tenuous nitrogen atmosphere was first detected by the imprint left on the light curve of a star that was occulted by the planet in 1985 (ref. 1), and studied more extensively during a second occultation e...

    B. Sicardy, T. Widemann, E. Lellouch, C. Veillet, J.-C. Cuillandre, F. Colas… in Nature (2003)

  4. No Access

    Article

    A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way

    Many galaxies are thought to have supermassive black holes at their centres1—more than a million times the mass of the Sun. Measurements of stellar velocities2,3,4,5,6,7 and the discovery of variable X-ray emissi...

    R. Schödel, T. Ott, R. Genzel, R. Hofmann, M. Lehnert, A. Eckart, N. Mouawad… in Nature (2002)