Title: Evidence for universality in the initial planetesimal mass function Author: Jacob B. Simon, Philip J. Armitage, Andrew N. Youdin, Rixin Li Planetesimals may form from the gravitational collapse of dense particle clumps initiated by the streaming instability. We use simulations of aero...
Newly Discovered World Is Most Like Jupiter A team of astronomers, including half a dozen from the Space Telescope Science Institute (STScI) in Baltimore, Maryland, have used the Gemini Observatory's new Gemini Planet Imager to find the most solar system-like planet ever directly imaged around...
Title: Discovery of Multiple Shells Around the Planetary Nebula IC 418 Authors: Gerardo Ramos-Larios, Roberto Vazquez, Martin A. Guerrero, Lorenzo Olguin, R.A. Marquez-Lugo, Hector Bravo-Alfaro We have analysed optical, near-, and mid-IR images of the bright planetary nebula (PN) IC 418. Th...
Title: K2-66b and K2-106b: Two extremely hot sub-Neptune-size planets with high densities Author: Evan Sinukoff, Andrew W. Howard, Erik A. Petigura, Benjamin J. Fulton, Ian J. M. Crossfield, Howard Isaacson, Erica Gonzales, Justin R. Crepp, John M. Brewer, Lea Hirsch, Lauren M. Weiss, David R....
Negribreen on the move Rapid acceleration of an Arctic glacier over the past year has been detected by the Copernicus Sentinel-1 satellites. Sitting on Norway's Spitsbergen island in the Svalbard archipelago, the Negribreen glacier has recently seen a surge in ice surface speed, increasing fro...
Asteroid (80) Sappho is at Opposition on the 9th May, 2010. Distance to Sun=2.527 AU Distance to Earth=1.518 AU Magnitude=11.0 mag Ephemeris Date UT R.A. (J2000) Decl. Delta r El. Ph. V h m s 2010 05 09 000000 15 06 24.1 -14 59 37 1.518 2.527 177.6 1.0 11.1 2010 05 10 000000 15 05 24.4 -14 51 54 1.516 2.525 1...
CXO J101527.2+625911: Astronomers Pursue Renegade Supermassive Black Hole Supermassive holes are generally stationary objects, sitting at the centers of most galaxies. However, using data from NASA's Chandra X-ray Observatory and other telescopes, astronomers recently hunted down what c...
Title: Seismic wave propagation in icy ocean worlds Author: Simon C. Stähler, Mark P. Panning, Steve D. Vance, Ralph Lorenz, Martin van Driel, Tarje Nissen-Meyer, Sharon Kedar To date, seismological efforts have been limited to terrestrial objects: Earth, the Moon, and soon Mars. All have in com...
NGC 4656 (also Hockey Stick Galaxies, IRAS 12417 + 3228, MCG 5-30-66, UGC 7907 and PGC 42863) is a magnitude +10.2 irregular spiral galaxy located 25 to 30 million light-years away in the constellation Canes Venatici. The galaxy can be found about 4.5 degrees NE of the star gamma Comae Berenices. Tel...
Title: DW UMa and the Irradiation Modulated Mass Transfer Model for Superhumps Author: J. Smak The light curves of the permanent superhumper DW UMa are analysed in order to determine the amplitudes of its superhumps, A_SH, and the amplitudes of the periodic light variations with the beat period --...
Winning plans for CubeSats to the Moon If you could fly a CubeSat to the Moon, what could such a tiny satellite do there? ESA posed this question - and now four proposals will be studied in more detail for possible flight over the coming decade. These miniature missions variously involve probing lunar...
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