Search results
Results from the WOW.Com Content Network
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 ...
See also: Globular cluster, List of globular clusters Messier 79 (also known as M79 or NGC 1904 ) is a globular cluster in the southern constellation Lepus . It was discovered by Pierre Méchain in 1780 and is about 42,000 light-years away from Earth and 60,000 light years from the Galactic Center .
It contains several hundred thousand stars, and ranks among the densest globular clusters in the Milky Way. [9] It is at more than twice the distance of the Galactic Center in regions considered the Galactic halo. It hosts relatively many blue stragglers, stars that appear to be much younger than the cluster. It is thought these have lost part ...
Image taken by ESO's VISTA of the Globular Cluster VVV CL001. On the right lies the globular star cluster UKS 1 and on the left [where?] lies a much less conspicuous new discovery, VVV CL001. [1] The two are not physically located close to each other; this is a line-of-sight coincidence. [2] This is a list of globular clusters.
Messier 3 is the prototype for the Oosterhoff type I cluster, which is considered "metal-rich". That is, for a globular cluster, Messier 3 has a relatively high abundance of heavier elements. [15] Arcturus and Cor Caroli can be used to help locate M3
Neutrophils are the most abundant white blood cells in the human body (approximately 10 11 are produced daily); they account for approximately 50–70% of all white blood cells (leukocytes). The stated normal range for human blood counts varies between laboratories, but a neutrophil count of 2.5–7.5 × 10 9 /L is a standard normal range.
Hemoglobin is an iron-containing protein that gives red blood cells their color and facilitates transportation of oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs to be exhaled. [3] Red blood cells are the most abundant cell in the blood, accounting for about 40–45% of its volume. Red blood cells are circular ...
The glomerulus is a small tuft of capillaries containing two cell types. Endothelial cells, which have large fenestrae, are not covered by diaphragms. Mesangial cells are modified smooth muscle cells that lie between the capillaries. They regulate blood flow by their contractile activity and secrete extracellular matrix, prostaglandins, and ...