planetary nebula
51Red Rectangle Nebula — Protoplanetary nebula caption = name = Red Rectangle Nebula epoch = J2000 ra = RA|06|19|58.2160Harv|SIMBAD|2007] dec = DEC| 10|38|14.691 dist ly = 2.3 ± 0.3 kly (710 ± 100 pc)Harv|Men shchikov|Schertl|Tuthill|Weigelt|2002] appmag v = 9.02 size v …
52Double Helix Nebula — Spitzer Space Telescope image with artificial coloration Observation data: J2000 epoch Type …
53Dumbbell nebula — Astron. the planetary nebula in the constellation Vulpecula, which in photographs appears to have the shape of a dumbbell. [1975 80] * * * Dumbbell Nebula, a nebula of the planetary type in the constellation Vulpecula, having the shape of a… …
54Ring Nebula — Astron. a planetary nebula in the constellation Lyra that has a ringlike appearance surrounding its central star. * * * ▪ astronomy (catalog numbers NGC 6720 and M 57), bright nebula in the constellation Lyra, several thousand light years from… …
55Butterfly Nebula (disambiguation) — A butterfly nebula is a two lobed nebular object that, when viewed in visible light or in false color images, takes on an apparent structure resembling the appearance of a butterfly.Specific nebulas commonly referred to by the name Butterfly… …
56protoplanetary nebula — noun A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula. Syn: preplanetary nebula …
57preplanetary nebula — noun A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula. Syn: protoplanetary nebula …
58stellar nebula — noun Etymology: stellar + nebula 1. : the nebulosity surrounding a star : a star s shell or envelope of nebulosity 2. : planetary nebula …
59Dumbbell nebula — Astron. the planetary nebula in the constellation Vulpecula, which in photographs appears to have the shape of a dumbbell. [1975 80] * * * …
60Orion Nebula — The entire Orion Nebula in visible light. Credit: NASA/ESA Observation data: J2000 epoch …
