NGC 6558
| Kugelsternhaufen NGC 6558 | |
|---|---|
 (c) ESA/Hubble & NASA, R. Cohen, CC BY 4.0 | |
| Aufnahme des Zentrums des Kugelsternhaufens mithilfe des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Schütze |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 18h 10m 18,4s [1] |
| Deklination | -31° 45′ 49″ [1] |
| Erscheinungsbild | |
| Helligkeit (visuell) | 8,6 mag [2] |
| Winkelausdehnung | 4,2' [2] |
| Physikalische Daten | |
| Entfernung | 24,1 kLj |
| Geschichte | |
| Entdeckung | John Herschel |
| Entdeckungsdatum | 3. August 1834 |
| Katalogbezeichnungen | |
| NGC 6558 • C 1807-317 • GCl 89 • ESO 456-62 • Mel 194 • VDBH 259 • Cr 368 | |
NGC 6558 ist ein 24.100 Lichtjahre entfernter Kugelsternhaufen im Sternbild Schütze. Der Kugelsternhaufen wurde im Jahr 1834 von dem Astronomen John Herschel mit seinem 18,7-Zoll-Teleskop entdeckt und die Entdeckung später im New General Catalogue verzeichnet.[3]
Einzelnachweise
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(c) ESA/Hubble & NASA, R. Cohen, CC BY 4.0
Hubble Spies a Glittering Gathering of Stars
This glittering gathering of stars is the globular cluster NGC 6558, and it was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys. NGC 6558 is closer to the centre of the Milky Way than Earth is, and lies about 23 000 light years away in the constellation Sagittarius.
Globular clusters like NGC 6558 are tightly bound collections of tens of thousands to millions of stars, and they can be found in a wide range of galaxies. As this observation shows, the stars in globular clusters can be densely packed; this image is thronged with stars in a rich variety of hues. Some of the brightest inhabitants of this globular cluster are surrounded by prominent diffraction spikes, which are imaging artefacts caused by starlight interacting with the inner workings of Hubble.
Globular clusters equip astronomers with interesting natural laboratories in which to test their theories, as all the stars in a globular cluster formed at approximately the same time with similar initial composition. These stellar clusters therefore provide unique insights into how different stars evolve under similar conditions. This image comes from a set of observations investigating globular clusters in the inner Milky Way. Astronomers were interested in studying these globular clusters to gain greater insight into how globular clusters in the inner Milky Way form and evolve.
Credit:
ESA/Hubble & NASA, R. Cohen
Coordinates Position (RA): 18 10 13.36 Position (Dec): -31° 45' 52.91" Field of view: 3.41 x 3.10 arcminutes Orientation: North is 3.1° left of vertical
Colours & filters Band Wavelength Telescope Optical V 606 nm Hubble Space Telescope ACS Optical I 814 nm Hubble Space Telescope ACS Optical V 606 nm Hubble Space Telescope ACS Optical I 814 nm Hubble Space Telescope ACS.