Search results
Results from the WOW.Com Content Network
Messier 68 (also known as M68 or NGC 4590) is a globular cluster found in the east south-east of Hydra, away from its precisely equatorial part. It was discovered by Charles Messier in 1780. William Herschel described it as "a beautiful cluster of stars, extremely rich, and so compressed that most of the stars are blended together".
These are globular clusters within the halo of the Milky Way galaxy. The diameter is in minutes of arc as seen from Earth. For reference, the J2000 epoch celestial coordinates of the Galactic Center are right ascension 17 h 45 m 40.04 s, declination −29° 00′ 28.1″.
The first known globular cluster, now called M 22, was discovered in 1665 by Abraham Ihle, a German amateur astronomer. [4] [5] [6] The cluster Omega Centauri, easily visible in the southern sky with the naked eye, was known to ancient astronomers like Ptolemy as a star, but was reclassified as a nebula by Edmond Halley in 1677, [7] then finally as a globular cluster in the early 19th century ...
Miles M.68, a 4 engined development of Miles Aerovan; Soltam M-68, a 1968 155 mm 33 calibre towed howitzer manufactured in Israel; Messier 68, a globular cluster in the constellation Hydra; M68 Close Combat Optic, referring to the Aimpoint CompM2 or its later version the Aimpoint CompM4; M68 (tank gun)
The cluster has a half-light radius of 9.1 ly (2.80 pc) [6] with a core radius of about 1.6 ly (0.5 pc) and appears not to have undergone core collapse yet. The mass density at the core is 7.9 × 10 4 M ☉ ·pc −3. [b] [2] There are 38 RR Lyrae variable stars and the cluster appears to be Oosterhoff-intermediate in terms of metallicity.
Messier 28 or M28, also known as NGC 6626, is a globular cluster of stars in the center-west of Sagittarius.It was discovered by French astronomer Charles Messier in 1764. [11] [a] He briefly described it as a "nebula containing no star... round, seen with difficulty in 3 1 ⁄ 2-foot telescope; Diam 2′."
NGC 6496 is a globular cluster which is in the direction of the Milky Way's galactic bulge based on observations collected with the WFPC2 on board the Hubble Space Telescope. NGC 6496 was originally believed [ who? ] to be a member of the disc system of the Galactic Center , but scientists questioned this classification.
This implies that NGC 362 is a relatively young globular cluster. [6] It also has an overabundance of binary stars, and an exceptionally tight core 13 light-years in diameter. [ 6 ] The orbit of NGC 362 is highly eccentric, taking it to within 3,260 light-years of the Galactic Center .