apr 192014
Anne's Image of the Day: Globular Cluster Messier 92

  April 19, 2014 Messier 92, a globular cluster in Hercules Image Credits: NASA, ESA, the Hubble Heritage Team and WikiSky’s snapshot tool Messier 92 (also known as NGC 6341) is a globular star cluster of some 109 light-years across. It is located about 26,700 light-years away from Earth in the northern constellation of Hercules, around [continue reading]

sep 072013
Anne's Image of the Day: Galaxy Cluster Abell 2261

September 7, 2013 Abell 2261, a galaxy cluster in Hercules Image Credit: NASA, ESA, M. Postman (STScI), T. Lauer (NOAO), and the CLASH team Abell 2261 is a massive galaxy cluster that lies some three billion light-years away from Earth in the constellation of Hercules (after a Roman mythological hero). Abell 2261 is speeding away [continue reading]

jul 062013
Anne's Image of the Day: Elliptical Galaxy SDSS J162702.56+432833.9

July 6, 2013 SDSS J162702.56+432833.9, an elliptical galaxy in Hercules Image Credit: ESA/Hubble & NASA SDSS J162702.56+432833.9, also known as 2MASX J16270254+4328340, (why hasn’t it been given a proper name?) is a faint and diffuse elliptical galaxy, located roughly 500 million light-years away in the northern constellation of Hercules, while it is speeding away from us at [continue reading]

jul 112012
Ghost Galaxies Unmasked

  Astronomers have puzzled over why some puny, extremely faint dwarf galaxies spotted in our Milky Way galaxy’s back yard contain so few stars. Simulation of dark matter in the Milky Way halo These ghost-like galaxies are thought to be some of the tiniest, oldest, and most pristine galaxies in the universe. They have been [continue reading]