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A cosmic blue iris nebula blooms among the brown dust

26 Jun 2019, 13:00 UTC
A cosmic blue iris nebula blooms among the brown dust Adam Block/Steward Observatory/University of Arizona​​

Two things to keep in mind when you’re looking for cool things in our galaxy to observe: The Milky Way is flat, and it’s full of gas and dust.

Because it’s a flat disk, and the Sun (and the Earth and us) is in that disk, if you look around in the plane of the disk you’re looking right through the galaxy itself (if you look up and down, perpendicular to the disk, you’re looking out of the disk). And because it’s filled with interstellar junk, when you look in the plane of the disk you’re seeing the most stuff.

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