NGC 6565
| Planetarischer Nebel NGC 6565 | |
|---|---|
 (c) ESA/Hubble, CC BY 4.0 | |
| Aufnahme des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Schütze |
| Position Äquinoktium: J2000.0 | |
| Rektaszension | 18h 11m 52,6s [1] |
| Deklination | −28° 10′ 42″[1] |
| Erscheinungsbild | |
| Scheinbare Helligkeit (visuell) | 10,0 mag [2] |
| Scheinbare Helligkeit (B-Band) | 12,5 mag [2] |
| Winkelausdehnung | 0,23′ × 0,23′ [3] |
| Zentralstern | |
| Bezeichnung | HD 166468 [2] |
| Scheinbare Helligkeit | 20,0 mag [4] |
| Spektralklasse | Pc [4] |
| Physikalische Daten | |
| Rotverschiebung | −0,000016 ± 0,000007 [2] |
| Radialgeschwindigkeit | (−4,9 ± 2) km/s [2] |
| Entfernung | 15.400 Lj (4.714 ± 943 pc) [5] |
| Geschichte | |
| Entdeckung | Edward C. Pickering |
| Datum der Entdeckung | 14. Juli 1880 |
| Katalogbezeichnungen | |
| NGC 6565 • PK 3-4.5 • ESO 456-PN70 • Hen 2-362 | |
NGC 6565 ist ein planetarischer Nebel im Sternbild Schütze, welcher etwa 7000 Lichtjahre von der Erde entfernt ist.
NGC 6565 wurde am 14. Juli 1880 von dem US-amerikanischen Astronomen Edward Charles Pickering entdeckt.[6]
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(c) ESA/Hubble, CC BY 4.0
A dying star’s final moments are captured in this image from the NASA/ESA Hubble Space Telescope. The death throes of this star may only last mere moments on a cosmological timescale, but this star’s demise is still quite lengthy by our standards, lasting tens of thousands of years!
The star’s agony has culminated in a wonderful planetary nebula known as NGC 6565, a cloud of gas that was ejected from the star after strong stellar winds pushed the star’s outer layers away into space. Once enough material was ejected, the star’s luminous core was exposed and it began to produce ultraviolet radiation, exciting the surrounding gas to varying degrees and causing it to radiate in an attractive array of colours. These same colours can be seen in the famous and impressive Ring Nebula (heic1310), a prominent example of a nebula like this one.
Planetary nebulae are illuminated for around 10 000 years before the central star begins to cool and shrink to become a white dwarf. When this happens, the star’s light drastically diminishes and ceases to excite the surrounding gas, so the nebula fades from view.
A version of this image was entered into the Hubble’s Hidden Treasures basic image competition by contestant Matej Novak.