Hubble reveals previously unseen shocks

This new, detailed, Hubble image shows a planetary nebula in the making of a proto-planetary nebula. A dying star (hidden behind dust and gas in the centre of the nebula) has ejected massive amounts of gas. Parts of the gas have reached tremendous velocities of up to one-and-a-half million kilometres per hour. Shown in blue is light from hydrogen and ionised nitrogen arising from supersonic shocks where the gas stream rams into the surrounding material. The image shows for the first time these complex gas structures which are predicted by theory. The Hubble image was taken shortly before Christmas 2000 with the WFPC2 instrument (Wide Field and Planetary Camera 2) in four different filters. Here, light from 791 nm is displayed in red (exposure time 900 s), 675 nm in green (900 s), while combined light from hydrogen (656 nm) and ionised nitrogen atoms (658 nm) are shown as blue (14, 700 s).

Credit:

ESA & Valentin Bujarrabal (Observatorio Astronomico Nacional, Spain)

About the Image

Id:heic0111a
Type:Observation
Release date:24 August 2001, 15:00
Related releases:heic0111
Size:843 x 794 px

About the Object

Name:Calabash Nebula, OH 231.8+4.2
Type:• Milky Way : Nebula : Type : Planetary
• X - Nebulae Images/Videos
Distance:4500 light years

Colours & filters

BandWavelengthTelescope
Optical
H-alpha + Nii
658 nm Hubble Space Telescope
WFPC2
Optical
R
675 nm Hubble Space Telescope
WFPC2
Infrared
I
791 nm Hubble Space Telescope
WFPC2

Image Formats

Large JPEG
267.9 KB
Screensize JPEG
255.1 KB

Print Layout

Screensize JPEG
283.2 KB

Wallpapers

1024x768
318.5 KB
1280x1024
475.3 KB
1600x1200
624.9 KB

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