... msb . A blue reflectionnebula, HII region and dust lanes . 11c . Lagoon zoom . ... 40 inch . msb . Interesting reflectionnebula with dust clouds . 14a . NGC 3603 . ...
... Reflectionnebula, NGC 1999 in Orion. Reflection nebulae are much less dense than emission nebulae. ... may be old enough to have dispersed most of the surrounding dust and gas but still have traces left as a reflectionnebula ...
... The reflectionnebula NGCб 2023 is one of the brightest sources of fluorescent molecular hydrogen in the sky, making it a ... of the cloud, some 450 pc from us, producing both a bright visual reflectionnebula and a UV-excited photodissociation region ...
... hydrogen line emission from two locations in the reflectionnebula NGC 2023 ... sources (NGC 2023) 1 Introduction The reflectionnebula NGC 2023 is one of the ... 450 pc from us, producing both a bright visual reflectionnebula and a UV-excited ...
... reflectionnebula . This type of nebula is associated with hot, young stars, typically B2 or hotter. ... The classic example of a reflectionnebula is that surrounding the Pleiades cluster. resolution . ...
... Figureб 7 is a map of the H / H intensity ratio in the reflectionnebula Parsamyanб 18, obtained from scans of the 2.12 and 2.25б m lines with UNSWIRF (Ryder etб al. ...
... We have measured over 100 lines of H from 1-2.5 m at two positions in the reflectionnebula NGCб 2023, selecting 35 for which reliable line fluxes and column densities can be inferred. ...
... 2 HH 49/50 Figure 1 shows IIIaJ, IIIaF and IVN images of the region near the visible reflectionnebula Ced Astronomical Society of Australia 1998 110 and ob jects HH 49/50. ...