Jason Nishiyama

@evilscientistca.bsky.social

Teacher, astronomer, political scientist and father. I wrote a book once: http://evl.link/df Alberta, Canada

NGC 6826 is a planetary nebula located about 2000 ly away in the constellation Cygnus. The two brighter parts coming from centre are FLIERs. Fast Low-Ionization Emission Regions are basically jets of fast moving gas moving from the centre of the nebula. #astronomy

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NGC 2438 is a planetary nebula located about 1400 ly away in the constellation of Puppis. Though it appears in the open cluster M46, it is not a member of the cluster. It is considerably closer as the cluster is about 5000 ly away and so is a foreground object. #astronomy

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M6 is an open cluster located about 1600 ly away in the constellation of Scorpius. Open clusters help us understand how stars evolve as their members were formed more or less at the same time. It allows a snapshot of how different masses of stars evolve compared to others in the cluster. #astronomy

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Stephan's Quintet is a group of 5 galaxies located about 250 Mly away in the constellation of Pegasus. Only 4 of the 5 galaxies are members of the same galactic group. NGC 7320 (galaxy lower right) is only about 39 Mly away and is a foreground object. #astronomy

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NGC 6058 is a planetary nebula located about 11 kly away in the constellation of Hercules. It is a star that has blown off it's outer layers. What was the star's core is now a central star that emits much UV light which causes the blown off gas to glow as the nebula. #astronomy

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Uranus is the 7th planet of our solar system. With Neptune, Uranus is one of two ice giant planets in our solar system. Uranus' rotational axis is highly tilted to its orbital plane at about 82 degrees (the Earth's is at 23.5 degrees) meaning that it rotates on its side. #astronomy

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M28 is a globular cluster located about 18 kly away in the constellation of Sagittarius. It is reddish in this image as from the telescope location it was very close to the southern horizon. The Earth's atmosphere scattered away much of the blue light, making the objects appear redder. #astronomy

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M78 is a reflection nebula located about 1350ly away in the constellation of Orion. M78 appears blue because it is a reflection nebula, which appear blue because the particle size in the nebula is such that it scatters blue light towards us. The red light goes through away from us. #astronomy

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The band of faint light we see across a portion of the night sky is the Milky Way. It is our Galaxy, a barred spiral galaxy that we see from inside the disk. When you look at the constellation Sagittarius you are looking towards the core of our Galaxy. #astronomy

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IC1747 (small blue dot at centre) is a planetary nebula located about 9800 ly away in the constellation of Cassiopeia. Planetary nebula are stellar remnants, stars around the mass of the Sun in their death throes. Eventually only a white dwarf star will remain. #astronomy

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Pillars of creation 🤩 These columns of gas and dust are being sculpted, illuminated, and destroyed by ultraviolet light from massive stars. Within a few million years, they will be gone forever. Read more: https://www.eso.org/public/news/eso0142/ 🔭 📷 ESO/M.McCaughrean & M.Andersen (AIP)

A star field set against faint clouds of interstellar gas and dust. Dark, finger-like dust structures wind through the centre of the image