About the Object

Distance: 2 million light years
Constellation: Sagittarius
Category: Galaxies
Picture of the Month


Position (RA):19 44 58.17
Position (Dec):-14° 48' 20.68"
Field of view:6.77 x 1.85 arcminutes
Orientation:North is 92.9° right of vertical

Colours & filters

7.7 μmJames Webb Space Telescope
10 μmJames Webb Space Telescope
Infrared 15 μmJames Webb Space Telescope
Infrared 21 μmJames Webb Space Telescope

NGC 6822 (MIRI image)

This image shows the irregular galaxy NGC 6822, as observed by the Mid-InfraRed Instrument (MIRI) mounted on the NASA/ESA/CSA James Webb Space Telescope. MIRI probes the mid-infrared, which in this case makes it perfectly suited to observe the dense regions of gas that suffuse this galaxy.

At mid-infrared wavelengths the emission of light by galactic dust is prominent, obscuring the galaxy’s stars which themselves are faint at these longer wavelengths. Brilliant blue gas indicates light emitted by organic compounds called polycyclic aromatic hydrocarbons, which play a critical role in the formation of stars and planets. Cyan marks cooler patches of dust, while warmer dust is more orange.

Distant galaxies far beyond NGC 6822 are displayed in orange. The few galaxies that are relatively closer, meanwhile, are marked in green by their own light-emitting dust, which MIRI can pick out. Bright red and magenta colours indicate active areas of star formation in the galaxy. With so many stars, supernova explosions are routine, and an amazing example of a supernova remnant is visible in this image: a red ring just below the centre.

[Image Description: A dark field covered by many layers of billowing clouds, made of gas and dust, spread out in complex patterns. In the centre the clouds are dense and glowing; out towards the edges, they become dark and faint. Bright galaxies with various shapes and sizes shine through the clouds. Many bright stars with visible diffraction spikes are spread throughout the image.]



ESA/Webb, NASA & CSA, M. Meixner

About the Image

Id: potm2307b
Type: Observation
Release date: 31 July 2023, 10:00
Size: 3653 x 1000 px

Image Formats

Download IconLarge JPEG 1.8 MB
Download IconScreensize JPEG 167.9 KB



Download Icon1024x768 465.3 KB
Download Icon1280x1024 618.4 KB
Download Icon1600x1200 818.4 KB
Download Icon1920x1200 980.7 KB
Download Icon2048x1536 1.1 MB

Also see our