Messier 28: Difference between revisions
(Created page with "Messier 28 (also known as M28 or NGC 6626) is a globular cluster in the constellation Sagittarius. It was discovered by French astronomer Charles Messier on July 27, 1764....") |
No edit summary |
||
| Line 2: | Line 2: | ||
M28 is at a distance of about 17,900 light-years away from Earth. It has a combined 551,000[3] times the mass of the Sun and is 12 billion years old.[7] 18 RR Lyrae type variable stars have been observed in this cluster. In 1986, M28 became the first globular cluster where a millisecond pulsar, PSR B1821–24, was discovered with the Lovell Telescope at Jodrell Bank Observatory. A total of 11 additional millisecond pulsars have since been detected in the cluster with the Green Bank Telescope. As of 2011, this is the third largest known population of pulsars in a cluster following Terzan 5 and 47 Tucanae.<ref>[http://en.wikipedia.org/wiki/Messier_28 Messier 28]</ref> | M28 is at a distance of about 17,900 light-years away from Earth. It has a combined 551,000[3] times the mass of the Sun and is 12 billion years old.[7] 18 RR Lyrae type variable stars have been observed in this cluster. In 1986, M28 became the first globular cluster where a millisecond pulsar, PSR B1821–24, was discovered with the Lovell Telescope at Jodrell Bank Observatory. A total of 11 additional millisecond pulsars have since been detected in the cluster with the Green Bank Telescope. As of 2011, this is the third largest known population of pulsars in a cluster following Terzan 5 and 47 Tucanae.<ref>[http://en.wikipedia.org/wiki/Messier_28 Messier 28]</ref> | ||
==References==<references/>Found in HGS Manual on Page 108 [[Category: Ascension]][[Category: HGS Manual]] | ==References== | ||
<references/> | |||
Found in HGS Manual on Page 108 | |||
[[Category: Ascension]][[Category: HGS Manual]] | |||