IC 4634
This process has been far from orderly or calm, however, as revealed by the distinct, separate waves of thrown-off gases. One is more distant and therefore was spewed first, followed by a more recently ejected tide of matter that formed the tighter S-shape. The result is remarkably symmetric on each side of the central star.
The NASA/ESA Hubble Space Telescope’s Wide Field Planetary Camera 2 (WFPC2) captured this image of IC 4634, which is found more than about 7500 light-years away in the constellation of Ophiuchus (the Serpent Holder). IC 4634 and other objects like it are known as planetary nebulae due to their appearance through early telescopes as rounded, faintly luminous discs similar to the distant planets Uranus and Neptune. The picture was created from images through five different filters (F487N, F502N, F574M, F656N and F658N) that captured light emitted by different elements in the gaseous features. The total aggregate exposure time was 4000 seconds and the field of view is just 29 arcseconds across.Relevante Bilder
Relevante Artikel
IC 4634IC 4634 ist ein Planetarischer Nebel im Sternbild Schlangenträger am Südsternhimmel, der schätzungsweise 7.500 Lichtjahre von der Sonne entfernt ist. Er hat eine punktsymmetrische, s-förmige Struktur, worin seine innere Hülle sich mit 20 km/s ausbreitet. Die innere Hülle zeigt eine intensive H-alpha-Emission, während die S-förmigen Bänder eine NII-Emissionlinie aufweisen. .. weiterlesen
Liste planetarischer NebelDer folgende Abschnitt enthält Eigenschaften bekannter Planetarischer Nebel. .. weiterlesen