Wikipedia In the 19th century, Benjamin Apthorp Gould assigned the Greek letter ξ (Xi) to the cluster to designate it as ξ Tucanae, but this was not widely accepted and it is almost universally referred to as 47 Tucanae. The following image is a photograph of Ngc 104 from the Digitized Sky Survey 2 (DSS2 – see imprint), taken in the red channel. The following image is a photograph of NGC 104 from the Digitized Sky Survey 2 (DSS2 – see imprint), taken in the red channel. NGC 104, better known as 47 Tucanae, is the second largest and second brightest globular cluster in the sky, dwarfed only by another southern globular cluster, Omega Centauri (NGC 513). In the 19th century, Benjamin Apthorp Gould assigned the Greek letter ξ (Xi) to the cluster to designate it as ξ Tucanae, but this was not universally accepted and it is almost universally referred to as 47 Tucanae.
NGC 104, better known as 47 Tucanae, is the second largest and second brightest globular cluster in the sky, surpassed only by another southern globular cluster, Omega Centauri (NGC 513). It is about 4.0 ± 0.35 kpc from Earth and 120 light years across.
How old is NGC 104?
Finder Chart for 47 tucanae – pdf format NGC 104, better known as 47 Tucanae, is the second largest and second brightest globular cluster in the sky, dwarfed only by another southern globular cluster, Omega Centauri (NGC 513).Finder Chart for 47 tucanae – pdf format NGC 104, better known as 47 Tucanae, is the second largest and second brightest globular cluster in the sky, dwarfed only by another southern globular cluster, Omega Centauri (NGC 513).It has an extremely dense core, believed to house a giant black hole, and is one of the most massive globular clustersBullet clusters are very tightly bound together by gravity, giving them their spherical shape and the high concentration of stars at their centre. Finder Chart for 47 tucanae – pdf format NGC 104, better known as 47 Tucanae, is the second largest and second brightest globular cluster in the sky, dwarfed only by another southern globular cluster, Omega Centauri (NGC 513). it has an extremely dense core, thought to harbour a giant black hole, and is one of the most massive globular clustersGlobular clusters are very tightly bound together by gravity, giving them their spherical shape and the high concentration of stars at their centre. The cluster known as 47 Tucanae (NGC 10 ), with an absolute visual magnitude of -9.42 at a similar distance of 14 700 light years, has a different appearance with a strong central concentration.
How old is Tuc 47?
The densely packed globular cluster 47 Tuc also hosts a star with the closest known orbit around a black hole. Based on these measurements, astronomers pieced together the history of the stars and found two populations of stars with different chemical compositions and different motions. The astronomers used these Hubble observations, along with archival Hubble data from 47 Tucanae, to accurately measure the position changes of more than 30,000 stars in the cluster. Understanding the dynamics of 47 Tucanae ‘s stars can shed light on how this cluster formed its stars.
These images show the ancient globular cluster 47 Tucanae, a dense swarm of up to a million stars.
What was discovered in the globular cluster 47 Tucanae?
The constellation is home to the dwarf galaxy Tucana, the Small Magellanic Cloud, the globular cluster 47 Tucanae and several other notable deep-sky objects. It was discovered in 1751 by the French astronomer Nicholas Louis de Lacaille, who included it in his list of southern nebular objects. The Hertzsprung-Russell diagram of the cluster indicates stars that are about 13 billion years old, which is unusually old. All the stars are thought to have formed from the same gas cloud at about the same time. Globular clusters like 47 Tucanae are a wonderful study of how stars evolve and interact.
As the name “47 Tucanae” suggests, its core was first catalogued as a star and numbered 47 in Tucana the Toucan – but not for long.
Is 47 Tucanae in the Milky Way?
As its name “47 Tucanae” suggests, this object was first catalogued as a star and numbered 47th in Tucana before being recognised as a star cluster. The cluster known as 47 Tucanae (NGC 10), with an absolute visual magnitude of -9.42 at a similar distance of 14,700 light years, has a different appearance with a strong central concentration. Astronomers discovered this exceptionally close pair of stars in globular cluster 47 Tucanae, a dense collection of stars on the edge of the Milky Way, about 14,800 light years from Earth. Three telescopes – ESA’s Chandra, XMM-Newton and NASA’s Rossi X-ray Timing Explorer (RXTE) – were used to observe eight different neutron stars, including one in 47 Tucanae, a globular cluster located about 15,000 light years away on the edge of the Milky Way.
