@crazywhenisleep is referencing this gif that alternates between these two images, one in visible light and one in infrared, asking which is the one in infrared:
It’s the second one.
FUN SIDE NOTE
“infrared” is a wavelength of light just below what humans can see. Red is the color we perceive when we see the longest wavelength we can, and ‘infra’ means ‘below.’ Hence, “infrared”–“below red”
FUN SIDE NOTE 2:
In movies (or maybe in real life?) you’ve probably seen strip clubs depicted as having red lights. This isn’t an accident, and they often use red light; as the wavelength of light gets longer, it is harder and harder for humans to see detail. Further, we can’t see as well in red light since we didn’t evolve to see in such conditions. Thus, red light effectively “covers up” small defects and marks on your skin.
Strip clubs, and other such places, use that color light because of this.
The Lores Nebula
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Center of the Milky Way
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NGC 6823: Cloud Sculpting Star Cluster : Star cluster NGC 6823 is slowly turning gas clouds into stars. The center of the open cluster, visible on the upper right, formed only about two million years ago and is dominated in brightness by a host of bright young blue stars. Some outer parts of the cluster, visible in the featured images center as the stars and pillars of emission nebula NGC 6820, contain even younger stars. The huge pillars of gas and dust likely get their elongated shape by erosion from hot radiation emitted from the brightest cluster stars. Striking dark globules of gas and dust are also visible across the upper left of the featured image. Open star cluster NGC 6823 spans about 50 light years and lies about 6000 light years away toward the constellation of the Fox . via NASA
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NGC 6302- The Butterfly Nebula
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Supernova 1994D in galaxy NGC 4526
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False-color image of Saturn shows the planets reflected infrared light. The blue colors indicate a clear atmosphere down to a main cloud layer. Different shadings of blue indicate variations in the cloud particles, in size or chemical composition; Erich Karkoschka /NASA/ESA
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