okt 012013
 
Anne's Image of the Day: Globular Cluster Messier 71

October 1, 2013 Messier 71, a globular cluster in Sagitta  Image Credit: ESA/Hubble and NASA Messier 71 (also known as NGC 6838) is a globular cluster of about 27 light-years across, located on the edge of our Galaxy around 12,500 light-years away from Earth in the small constellation of Sagitta (the Arrow). It has a [continue reading]

aug 282013
 
Anne's Image of the Day: Globular Cluster Messier 19

August 28, 2013 Messier 19, a globular cluster in Ophiuchus Image Credit: Doug Williams, REU Program/NOAO/AURA/NSF Messier 19 (also known as NGC 6273) is a globular cluster of some 140 light-years across, located about 28,700 light-years away from Earth in the constellation of Ophiuchus (the Serpent-bearer). It is receding form us at approximately 135 kilometers [continue reading]

aug 182013
 
Anne's Image of the Day: Globular Cluster Messier 12

August 18, 2013 Messier 12, a globular cluster in Ophiuchus Image Credit & Copyright: Michael Gariepy/NOAO/AURA/NSF & Adam Block/Mount Lemmon SkyCenter/University of Arizona (http://skycenter.arizona.edu/gallery) Messier 12 (also known as NGC 6218) is a globular cluster of approximately 75 light-years across, located about 15,700 light-years away from Earth in the constellation of Ophiuchus (the Serpent-bearer), while [continue reading]

aug 072013
 
Anne's Image of the Day: Globular Cluster Messier 14

August 7, 2013 Messier 14, a globular cluster in Ophiuchus Image Credit & Copyright: Robert Gendler (http://www.robgendlerastropics.com) Messier 14 (also known as NGC 6402) is a slightly elliptical globular cluster of about 100 light-years across, located some 30,300 light-years away from Earth in the constellation of Ophiuchus (the Serpent-bearer). It is one of Charles Messier’s [continue reading]

jul 272013
 
Anne's Image of the Day: Globular Cluster Messier 2

July 27, 2013 Messier 2, a globular cluster in Aquarius Image Credit: NASA/ESA /HST/STScI, via WikiSky Messier 2 (also known as NGC 7089) is a globular cluster of about 175 light-years across, located some 37,500 light-years away from Earth in the constellation of Aquarius (the Water-Bearer), five degrees north of the star Beta Aquarii. It [continue reading]

jul 202013
 
Link Between Stars' Ages and Their Orbits in Dense Cluster

  Astronomers using NASA’s Hubble Space Telescope have for the first time linked two distinct populations of stars in an ancient globular star cluster to their unique orbital dynamics, offering proof that the stars do not share the same birth date. The globular cluster 47 Tucanae. Image Credit & Copyright: Michael Sidonio (http://www.pbase.com/strongmanmike2002) The analysis of the [continue reading]