There Might Not Be Sound In Space, But There Is Quite A Lot To Listen To In The Radio Frequencies (especially

This is a picture of the hydrogen and dust cloud surrounding the star Sadr (the bright white dot near the center) also known as IC 1318. The bright parts represent hydrogen clouds and the dark parts dust clouds. Those types of clouds are the birthplace of new stars. This particular photo is in black and white because it was made by using a filter that lets only the light emitted by ionised hydrogen (the H alpha spectral line) pass through it. This increases the visibility of the hydrogen clouds. Since this light is at 656 nm, it would appear bright red if coloured. Together with H beta (496 nm) also from hydrogen and O III (around 500 nm) from oxygen both cyan in color, they represent the majority of light emitted by gas clouds. So in conclusion if you were able to see this gas cloud directly it would appear a reddish-magenta color (H alpha being the dominant emission).

Photo of Pickering's triangle (also known as Fleming's triangle) and NGC 6979 / NGC 6974 (the more diffused clouds at the top center/left). This is the third part of the Cygnus loop / veil nebula, this part of the supernova remnant is fainter than the previous two parts of the loop I photographed. This explains in part why it was only discovered by in 1904 by Williamina Fleming (whereas the two writer part were discovered in 1784 by William Herschel). Williamina Fleming was a pioneer in stellar classification, she worked with other women at the Harvard college observatory. Their work in star classification resulted in the Henry Draper Catalogue, an extensive (225 300 stars in the first edition) classification of stars with their position and their spectra. Williamina is also credited with the discovery of 59 nebula (including the famous hors head nebula) more than 300 variable stars as well as (with Henry Norris Russell and Edward Charles Pickering) the discovery of white dwarfs (the remnants of dead sun-like stars).

For those not in the US wanting to search for dark skies near you, this website is quite useful.

The black areas represent the remaining natural dark skies in the United States

Photo a few galaxies, M81 / bode's galaxy (centre), M82/the cigar galaxy (left) and NGC 3077 (right)

In addition to those three galaxies, there are many other (much) smaller ones hidden among the stars (a few examples):

The red-ish filament visible around M82 are ionised hydrogen gas and dust pushed outwards by galactic-superwind

Those are tough to be a combination of solar winds created by young stars and the shockwaves of frequent supernovas. They mostly occur in starburst galaxy a type of galaxies that experience heightened stars formation generally due to recent gravitational interaction with other galaxies, in the case of M82 the trigger is most likely its neighbour M81.

(Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera ZWO LRGB filters and Baader 6.5nm Ha filter. 12x180s image for each colour filter (RGB), 6x300s for the Ha filter, total imaging time 2h 54min, stacking and processing done in PixInsight.)

“the arts and sciences are completely separate fields that should be pitted against each other” the overlap of the arts and sciences make up our entire perceivable reality they r fucking on the couch

Picture of IC59 and IC63. This is a pair of nebula located near the star γ Cassiopeia, the big star at the bottom, which is responsible for making the nebula glow. Both nebula are composed of ionise hydrogen responsible for the red colour (especially on IC63) and colder dust/gas responsible for the blue colour (most visible on IC59). γ Cassiopeia can make taking photos of those nebula difficult due to the halos it produces, I did my best to limit its impact during processing, but there is still a faint blue halo around it. IC63 is also known as the Ghost of Cassiopeia due to its shape, it was discovered in 1893 by the German astronomer Max Wolf.

Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera. 12x300s image for each filter (LRGBHa), total imaging time 5h, stacking and processing done in PixInsight. Details of both objects: IC63

IC59

Photo of the Iris nebula / Caldwell 4 / NGC 7023, I'm very pleased with this one since I finally managed to capture the surrounding dust (barely visible in the 2 previous attempts). This is a reflection nebula, this means that it's a dust cloud reflecting the light from a nearby star. Being one of the brightest reflection nebula visible in the northern hemisphere it's visible in relatively small telescopes (4-6 inch / 100-150mm diameter), unfortunately the outer dust clouds can only be seen on photos. Reflection nebula generally tend to be blue due to a more efficient scattering of blue light compared to red by the dust particles (M45 in my previous post is another good example).

I've worked in a chemistry lab, they had a room with all the analysis and purification equipment. There was a constant noise due to the various pumps (vacuum, solvent, ...) and valves. After just a few days working there I could telle exactly with machin was doing what task and at what point it was in that process just based upon the noise they made.

Photo of the NGC 2237, the Rosette nebula and the star cluster inside it, NGC 2244.

The star cluster, which is estimated to be about 5 million years old, is responsible for the ionisation of the surrounding gas. The mass of the nebula is estimated to be about 10 000 times the mass of our sun, which is relatively massive for a diffuse nebula.

This image uses a SHO palette, I quite like the colours I manage to get, both as the normal and starless images.

I also tried using the Foraxx palette, I think it's a bit less interesting visually, but the dark dust structures seam a bit more visible.

(Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera ZWO LRGB filters and Baader 6.5nm SHO filter. 5x120s image for each colour filter (RGB), 15x300s for the Ha filter 20x300s for the SII filter and 18x300s for the OIII filter, total imaging time 4h 25min, stacking and processing done in PixInsight.)

A photo of the comet 12P ponce-brook, taken from my bedroom window. In the middle ages, comets were regarded as omens of great change, generally bad ones. It's only after the discovery of their periodic return (during the 15's to 16's hundred) and later discovery of their nature (big balls of mostly ice and some rocks orbiting the sun) that comets stoped to be feared. Despite that, I still find them to be awe-inspiring.

For those interested, this comet is currently visible with a good pair of binoculars or a telescope if you look in the Andromeda constellation (more information on positions and visibility: https://theskylive.com/12p-info) I would have taken more pictures or a better one if the clouds had not been consistently thwarting any attempts at observation in the last week and a half.