| M5 | |
 |
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| Observation data (J2000 epoch) | |
|---|---|
| Class | V |
| Constellation | Serpens |
| Right ascension | 15h 18m 33. In Astronomy, an epoch is a moment in time used as a reference for the Orbital elements of a Celestial body. In Astronomy, an epoch is a moment in time used as a reference for the Orbital elements of a Celestial body. The Shapley–Sawyer Concentration Class is a classification system on a scale of one to twelve using Roman numerals for Globular clusters according to their concentration In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Serpens (ˈsɝpənz Latin for " Snake " is one of the 88 modern Constellations and was also one of the 48 listed by Ptolemy. Right ascension (abbrev RA; symbol α) is the Astronomical term for one of the two Coordinates of a point on the Celestial sphere 75s[1] |
| Declination | +02° 04′ 57. In Astronomy, declination (abbrev dec or δ) is one of the two coordinates of the Equatorial coordinate system, the other being either 7″[1] |
| Distance | 24. 5 kly (7. A light-year or light year (symbol ly) is a unit of Length, equal to just under ten trillion Kilometres As defined by 5 kpc) |
| Apparent magnitude (V) | +6. History The first direct measurements of an object at interstellar distances were undertaken by German Astronomer Friedrich Wilhelm Bessel in 1838 The apparent magnitude ( m) of a celestial body is a measure of its Brightness as seen by an observer on Earth, normalized to the value 65[1] |
| Apparent dimensions (V) | 23′. 0 |
| Physical characteristics | |
| Mass | kg ( M ) |
| Radius | 80 ly |
| Estimated age | 13 Gyr |
| Other designations | NGC 5904[1] |
| See also: Globular cluster, List of globular clusters | |
Globular Cluster M5 (also known as Messier Object 5 or NGC 5904) is a globular cluster in the constellation Serpens. The solar mass is a standard way to express Mass in Astronomy, used to describe the masses of other Stars and galaxies. The New General Catalogue ( NGC) is the best-known catalogue of Deep sky objects in Amateur astronomy. A globular cluster is a spherical collection of Stars that orbits a galactic core as a Satellite. This is a list of Globular clusters. The apparentmagnitude does not include an extinction correction A globular cluster is a spherical collection of Stars that orbits a galactic core as a Satellite. In common usage a constellation is a group of celestial bodies that are connected together in some arrangement typically stars to form a visible figure or picture Serpens (ˈsɝpənz Latin for " Snake " is one of the 88 modern Constellations and was also one of the 48 listed by Ptolemy. It was discovered by Gottfried Kirch in 1702. Gottfried Kirch ( Kirche, Kirkius) (December 18 1639—July 25 1710 was a German astronomer. Year 1702 ( MDCCII) was a Common year starting on Sunday (link will display the full calendar of the Gregorian calendar (or a Common year
Discovery and visibility
M5 is, under extremely good conditions, just visible to the naked eye as a faint "star" near the star 5 Serpentis. A star is a massive luminous ball of plasma. The nearest star to Earth is the Sun, which is the source of most of the Energy on Earth Binoculars or small telescopes will identify this cluster as non-stellar while larger telescopes will start to show individual stars, of which the brightest are of apparent magnitude 12. Binocular telescopes, or binoculars (also known as field glasses are two identical or Mirror - symmetrical telescopes mounted side-by-side and A telescope is an instrument designed for the observation of remote objects and the collection of Electromagnetic radiation. The apparent magnitude ( m) of a celestial body is a measure of its Brightness as seen by an observer on Earth, normalized to the value 2.
M5 was discovered by the German astronomer Gottfried Kirch in 1702 when he was observing a comet. Germany, officially the Federal Republic of Germany ( ˈbʊndəsʁepuˌbliːk ˈdɔʏtʃlant is a Country in Central Europe. Year 1702 ( MDCCII) was a Common year starting on Sunday (link will display the full calendar of the Gregorian calendar (or a Common year Charles Messier found it in 1764 and thought it a nebula without any stars associated with it. Charles Messier ( June 26, 1730 &ndash April 12, 1817) was a French astronomer most notable for publishing an Year 1764 ( MDCCLXIV) was a Leap year starting on Sunday (link will display the full calendar of the Gregorian calendar (or a William Herschel resolved individual stars in the cluster in 1791, counting roughly 200 of them. Sir Frederick William Herschel FRS KH ( 15 November 1738 – 25 August 1822) was a German -born British Year 1791 ( MDCCXCI) was a Common year starting on Saturday (link will display the full calendar of the Gregorian calendar (or a Common
M5 is not to be confused with the much fainter and more distant globular Palomar 5 which is situated nearby in the sky. Palomar 5 is a Globular cluster discovered by Walter Baade in 1950
Scientific data
Spanning 165 light-years across, M5 is one of the larger globular clusters known. The gravitational sphere of influence of M5, (ie. Gravitation is a natural Phenomenon by which objects with Mass attract one another the volume of space where stars would be gravitationally bound to the cluster and not ripped away from it by the Milky Way's gravitational pull), has a radius of some 200 light-years.
At 13 billion years old it is also one of the older globulars associated with the Milky Way Galaxy. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun The Milky Way (a translation of the Latin Via Lactea, in turn derived from the Greek Γαλαξίας (Galaxias sometimes referred to simply The distance of M5 is about 24,500 light-years away from Earth and the cluster contains more than 100,000 stars up to perhaps 500,000 according to some estimates. EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001
Variable stars
Some 105 stars in M5 are known to be variable in brightness, some 97 of them are of the RR Lyrae type. For the astronomical object see Variable star. Variable Star is a 2006 novel written by Spider Robinson RR Lyrae variables are Variable stars often used as Standard candles RR Lyrae are pulsating Horizontal branch stars with a mass of around half the RR Lyrae stars, sometimes referred to as "Cluster Variables", are somewhat similar to Cepheid type variables and as such can be used as a tool to measure distances in outer space since the relation between their luminosities and periods are well known. A Cepheid variable (pron ˈse-f(ē-id or ˈsē-f(ē-id or Cepheid is a member of a particular class of Variable stars notable for a fairly tight correlation The brightest and most easily observed variable in M5 varies from magnitude 10. 6 to 12. 1 in a period of just under 26. 5 days. A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the A dwarf nova has also been observed in this cluster. A dwarf nova (pl novae) is a type of Cataclysmic variable, consisting of a close Binary star system in which one of the components is a
External links
References
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