Red and blue in the sky seems right for the 4th of July!
This is another image from the fabulous dark skies of Dell City, Texas. This is two nebulae – M8 Lagoon and M20 Trifid – from the constellation Sagittarius. M8 is an emission nebula of ionized hydrogen gas where star formation is taking place. It is 5200 light years away from us, has apparent dimensions of 90 x 40 arcmin, and has an apparent magnitude of 4.6. M20 is a combination of three types of nebulas: the red side is an emission nebula of ionized hydrogen gas where star formation is taking place, the blue side is a reflection nebula of a cloud of dust reflecting light from a nearby star, and the black lines are a dark nebula of an interstellar cloud dense enough to block the light from behind it. It is 4100 light years away from us, has an apparent dimension of 28 arcmin, and an apparent magnitude of 6.3.
Although they’re in the same direction from us, imagine living at the midpoint between them! They’d be much larger and brighter since they’d only be 550 light years away, but they’d be in opposite directions in the sky.
Given their size, brightness, and proximity to one another, this pair is a great target for a small telescope.
This image was generated from about 3.8 hours of data.
On my first round of processing, I messed up the color processing and switched colors, making everything look purple instead of red and blue. An interesting effect, even if “wrong”. Isn’t the universe beautiful?
Happy 4th of July!
Camera geek info:
Canon EOS 60D in manual mode, 2 minute exposure, ISO 2000, custom white balance 3500K