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Via: @aaronjenkin ...
The Crab Nebula.
A bit of history:
In the summer of the year 1054 AD, Chinese astronomers saw a new "guest star," that appeared six times brighter than Venus. So bright in fact, it could be seen during the daytime for several months.
This "guest star" was forgotten about until 700 years later with the advent of telescopes. Astronomers saw a tentacle-like nebula in the place of the vanished star and called it the Crab Nebula.
Today we know it as the expanding gaseous remnant from a star that self-detonated as a supernova, briefly shining as brightly as 400 million suns. The explosion took place 6,500 light-years away. If the blast had instead happened 50 light-years away it would have irradiated Earth, wiping out most life forms.
In the late 1960s astronomers discovered the crushed heart of the doomed star, an ultra-dense neutron star that is a dynamo of intense magnetic field and radiation energizing the nebula. Astronomers therefore need to study the Crab Nebula across a broad range of electromagnetic radiation, from X-rays to radio waves.
This image combines data from five different telescopes: the VLA (radio) in red; Spitzer Space Telescope (infrared) in yellow; Hubble Space Telescope (visible) in green; XMM-Newton (ultraviolet) in blue; and Chandra X-ray Observatory (X-ray) in purple.
📷: NASA, ESA ...
550 light years away in the constellation Scorpius there is a very bright yellow star called Antares, very easily seen with the naked eye. If placed within the solar system it would extend out to between mars and Jupiter’s orbit. What you can’t see with the naked eye is all this excellent yellow reflection dust illuminated by the star. This dust is apart of the Rho Ophiuci molecular complex (the objective best place in the sky). This was imaged over one night in the Kofa mountains of Arizona. Hope you all enjoy :) ...