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Birthday · August 6, 1998

Infrared Horsehead

August 6, 1998

The Moon has changed phase thousands of times since the beginning of the cosmos, but only once did it shine on the night you arrived.

Infrared Horsehead

A little universe, just for you

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APOD published August 6, 1998. Full image credits are on the original APOD entry below. A publication-date match, not a photo taken on your date. Independent of NASA.

Behind the image

Infrared Horsehead

Original APOD · August 6, 1998

This famous cosmic dust cloud was imaged in infrared light by the European Space Agency's Infrared Space Observatory (ISO) satellite. The false-color picture shows the bright infrared emission from dust and molecular gas in part of the Orion star forming region surrounding the Horsehead Nebula. In visible light, the horsehead-shaped dust cloud looks dark against a background of bright glowing gas. But in this image, the interstellar infrared glow engulfs much of the horse's head. Just above and to the right of center, only the top remains crowned by a bright, newborn star. The very bright object at the lower left is the reflection nebula NGC 2023, a dense concentration of interstellar gas and dust which is also associated with newly formed stars.

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