Exposed Cranium Nebula (NIRCam and MIRI annotated images)

These images of the “Exposed Cranium” nebula PMR 1, captured by the James Webb Space Telescope’s NIRCam (Near-Infrared Camera) and MIRI (Mid-Infrared Instrument) include compass arrows, scale bar, and colour key for reference. Note that the relationship between north and east on the sky (as seen from below) is flipped relative to direction arrows on a map of the ground (as seen from above).

The scale bar is labeled in light-years, which is the distance that light travels in one Earth-year (it takes 6 months for light to travel a distance equal to the length of the bar). One light-year is equal to about 9.46 trillion kilometres. The field of view shown in this image is approximately 3.5 light-years across.

These images show invisible near-infrared and mid-infrared wavelengths of light that have been translated into visible-light colours. The colour key shows which NIRCam and MIRI filters were used when collecting the light. The colour of each filter name is the visible light colour used to represent the infrared light that passes through that filter.