Photo Of The NGC 2237, The Rosette Nebula And The Star Cluster Inside It, NGC 2244.

Ok, so I was searching for information on some of the objects visible in my photo of the horse head nebula and I found these two posts (Reddit and Astrobin) by DanielZoliro that also used a SII and Ha combination but with a slightly different processing (Notably, the RGB combination being R: SII, G: 0.6xHa + 0.4xSII, B: Ha). I loved his results and I had to try it with my own data. Did turn out great, but there was a reflection of a star on the SII data and this processing amplified it (the big reddish round/donut thing on right of the full image).

(Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera and Baader 6.5nm SHO filter. 5x120s image for each colour filter (RGB), 22x300s for the Ha filter and 32x300s for the SII filter, total imaging time 5h, stacking and processing done in PixInsight.)

can I read posts on the internet lightning speed ? yes.

can I read a scientific publication quickly ? also yes !!!

now, can I read a normal book at a somewhat regular speed ? no, I have to re-read the previous page, hell the previous chapter because I forgot what the conversation between the character was about !

This is a photo of the Andromeda galaxy I took nearly 5 years ago. The dark parts of the galaxy are gigantic clouds of dust and gas in which no stars and planets are born. This galaxy is one the closest one to our own, and yet it's 2.55 million light years from us, It's composed of about 1000 billion stars, in a few billion years it will collide with our own galaxy.

The two lighter blotches around Andromeda are two satellite Galaxys that orbit around Andromeda and are also composed of millions of stars.

Those numbers are so big they start to get inconceivable, and that's only a small fraction of what exists out-there. We are not much in the grand scheme of the universe, but when you look at the night sky and the wonders of the universe you can feel at least for a little while that you're part of it.

Picture of the bubble nebula and surrounding objects : Top left (the vague group of stars): M52 an open cluster

Center right: NGC 7538 an emission nebula (also known as the northern lagoon nebula)

Bottom center: NGC 7635/the bubble nebula and the surrounding hydrogen cloud

The ''bubble'' part of this nebula is created by the stellar wind (flow of gas, plasma and particle) emitted by the central star at nearly 650 million km/h hitting and compressing the surrounding interstellar gas. The central star (BD +602522) is currently estimated to be about 45 times heavier than our sun and about 4 million years old. Being so massive and thus very hot (it's a type O star) its lifespan is very limited for a star and it should go supernova in about 10 to 20 million years.

BD +602522 is slightly off center from the bubble, this is due to the interstellar gas being a bit more dense on one side and thus slowing the stellar wind more efficiently.

Single exposure to make the central star more visible.

Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera. 12x300s image for each colour filter (LRGB) and 12x300s for the Ha filter, total imaging time 5h, stacking and processing done in PixInsight.

Starless version of the same image:

Older image where the bubble is more distinct from the background hydrogen clouds :

There might not be sound in space, but there is quite a lot to listen to in the radio frequencies (especially when it comes to the planets of the solar system).

(the full article : https://www.jpl.nasa.gov/news/nasas-juno-spacecraft-enters-jupiters-magnetic-field ) Some ''similar'' sounds are also present on earth with for example the reverberation if radio waves emitted by lightning.

I'm trying to find a clean, concise, factual video of pulsar pulses but the top results on youtube are all fake clickbait bullshit. Where are the videos from professor so-and-so with 10 subscribers of simple black and white graphs.

(this page has what I'm looking for but afaik none of these videos are on youtube)

Finished working on my photo of the hors head.

Technically speaking the Horse Head is only the dark nebula, is bright hydrogen cloud behind it is known as IC434 and the second nebula (bottom left) is the flame nebula. The bright star in the center left is Zeta Orionis also known as Alnitak one of the three stars of Orion's Belt. IC434 primary ionisation source is the multiple star system Sigma Orionis (a bit above the frame), the hydrogen cloud being mostly ionise by the UV coming from those blue giant stars. The streaks visible in the nebulosity are mostly likely due to magnetic field within.

The Flame nebula's ionisation source is hidden behind it's dust cloud and is most likely part of a star cluster that Is only reviled using IR and X-ray imaging.

This photo appears mostly blue/teal wear-as most photos of this nebula are red(ish) this is because this nebula emits most of it's light in the H-alpha (656 nm) and S-II (around 672 nm) wavelength both of which are red, so in classic RGB images the nebula appears red. Initially I thought of doing an SHO image (were red is SII emission, green is H-alpha and blue is OIII) but this nebula lacks OIII emission (around 500 nm), so instead a used a modified SHH palette More precisely, I used SII for the red, a combination of both Ha and SII (0.8Ha + 0.2SII) for green and Ha for blue. The stars were taken separately in RGB and added back to the SHH image.

(Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera and Baader 6.5nm SHO filter. 5x120s image for each colour filter (RGB), 22x300s for the Ha filter and 32x300s for the SII filter, total imaging time 5h, stacking and processing done in PixInsight.)

Skip Google for Research

As Google has worked to overtake the internet, its search algorithm has not just gotten worse.  It has been designed to prioritize advertisers and popular pages often times excluding pages and content that better matches your search terms 

As a writer in need of information for my stories, I find this unacceptable.  As a proponent of availability of information so the populace can actually educate itself, it is unforgivable.

Below is a concise list of useful research sites compiled by Edward Clark over on Facebook. I was familiar with some, but not all of these.

⁂

Google is so powerful that it “hides” other search systems from us. We just don’t know the existence of most of them. Meanwhile, there are still a huge number of excellent searchers in the world who specialize in books, science, other smart information. Keep a list of sites you never heard of.

www.refseek.com - Academic Resource Search. More than a billion sources: encyclopedia, monographies, magazines.

www.worldcat.org - a search for the contents of 20 thousand worldwide libraries. Find out where lies the nearest rare book you need.

https://link.springer.com - access to more than 10 million scientific documents: books, articles, research protocols.

www.bioline.org.br is a library of scientific bioscience journals published in developing countries.

http://repec.org - volunteers from 102 countries have collected almost 4 million publications on economics and related science.

www.science.gov is an American state search engine on 2200+ scientific sites. More than 200 million articles are indexed.

www.pdfdrive.com is the largest website for free download of books in PDF format. Claiming over 225 million names.

www.base-search.net is one of the most powerful researches on academic studies texts. More than 100 million scientific documents, 70% of them are free

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.

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).

Image of IC 405 aka the Flaming Star Nebula This is an emission (the red part) and reflection (the blue part) nebula. It's relatively bright for a nebula with visual magnitude of +6.

The bright star at the center of the blue reflection nebula is AE Aurigae, it's the star responsible for the ionisation of the gas in this nebula. AE Aurigae is what's known as a runaway star, those are star that moves at high speed compared to their surrounding environment. They are the result of gravitational interaction between stars or stars being ejected by nearby supernovae. In the case of AE Aurigae, it was probably ejected due to gravitational interaction, its path has been traced back to the Orion Nebula from which it was ejected about 2 million years ago.

The moon was nearly full and somewhat close by when I took the photos, so it was a bit tricky to process them. As a result, the reflection part of the nebula was not as visible as I would have liked but I think the overall result is not too bad.

Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera. 6x300s image for each colour filter (LRGB) and 12x300s for the Ha filter, total imaging time 3h, stacking and processing done in PixInsight.

Tried applying the Ortonglow script in PixInsight to give the nebula a bit more depth, but I don't like the halos it gave around the bright stars on the left.