@CosmoSidewalk@astrodon.social
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CosmoSidewalk

@CosmoSidewalk@astrodon.social

Amateur astronomer and astrophotographer, member of AAVSO.

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CosmoSidewalk, to astrophotography Spanish
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Globular clusters not only exist in galaxy’s halos. M71 is practically embedded in Milky Way’s disc, just halfway (apparently) in between Albireo and Altair. This globular cluster has another peculiarity: it is rich in metals which is unusual for an old object like this.

CosmoSidewalk, to astrophotography Spanish
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Had the chance to capture this galaxy, M51, from my obsevatory in Mexico City this very week! Zoomed in beforehand to show you the details of this magnificent pair of interacting galaxies.

CosmoSidewalk, to Astro Spanish
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M16’s region close to the galactic center. Famous for featuring the Pillars of Creation, M16, popularly known as the Eagle Nebula, here resembles the face of a bearded man (can you make it out?).
Took this picture from my rooftop in Mexico City.

CosmoSidewalk,
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@stevenray @photography yes! More than 12 hours if integration of 5 minutes subexposures.

CosmoSidewalk, to Astro Spanish
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This turned out to be the last picture with my 130 mm Newtonian telescope. Unfortunately, high winds knocked it out despite my ZWO Mount had more than 11 pounds of counterweights to hold it in place. Anyway, the fact that I was able to capture 3 galaxies that are about 35 M-ly away makes me love my hobby no matter what.

CosmoSidewalk, to Astro Spanish
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I published a few weeks ago a widefield view of the Omega Glob Cluster with my Rokinon 135 mm lens. Couldn’t resist to try a closer look with my 130 mm newt, so I shot it again! Wouldn’t you have done the same? Love this yaw dropping cluster!

CosmoSidewalk, to Astro Spanish
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There are better pictures of NGC4216, a Galaxy you can find in Virgo’s Constellation. My idea, however, to capture it was two-folded: to capture it “as it appears to be” from my rooftop in Mexico City, but mostly to capture and understand the supernova explosion that happened there a few weeks ago and that you can find (WOW!) in my photograph.

CosmoSidewalk,
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SN 2024gy was discovered by Koichi Itagaki this year, on January 4. It was swiftly identified as a type 1a supernova. Let me tell you a little bit more about this type of star explosion. It turns out that type 1a supernovae happen only in binary star systems, normally consisting of a red giant star and a white dwarf, but it can also consist of two white dwarfs or a white dwarf and a not so big main sequence star.

CosmoSidewalk,
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Due to its density, the white dwarf steals mass from the fluffy, less dense star, producing an accretion disk around itself. This way, the small white dwarf gains slowly more and more mass, until it reaches a critical mass limit, known as the Chandrasekhar limit in honor of its discoverer. The deal is that at this limit the “repulsive” pressure exerted by the electrons of the white dwarf no longer resists the extra gravitational push of the extra mass gained.

CosmoSidewalk,
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A few moments after this collapse happens it explodes in a very luminous supernova. This way an ephemeral “new star” (that is why they are called “novae”) appears in our night sky. You can easily find this supernova in the inverted version of my picture.

CosmoSidewalk,
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But, how do we know that this explosion corresponds to this type of supernova? We can tell that thanks to spectroscopy. Spectroscopy allows us to measure, through the study of the star’s light, what elements (and some other awesome facts) are present in a star, a galaxy or, in this case, in the early remnants of a supernova. When silicone is present, in those specific peaks shown in the spectrum taken by Robin Leadbeater, we can tell for sure that the explosion corresponds to a type 1a supernova

CosmoSidewalk,
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Perhaps the most awesome part of this, is that these type of supernovae are very helpful to measure large distances in our cosmos. In fact, by measuring them we were able to tell that the Universe in which we live is not only expanding, but actually accelerating its expansion.
To be able to learn things like this, and by actually be capable of capturing them with my own means, is what it keeps me going in this amazing hobby.

CosmoSidewalk, to astrophotography Spanish
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The steep learning curve to ! Like most of us, I started out with a very modest rig and an unmodified DSLR camera. We have to add that my processing skills were also not the best. And although all this, I enjoyed the hobby as much as I am enjoying it now.

image/png

CosmoSidewalk, to Astro Spanish
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If I understood well, our cosmos at the beginning was a very dense but chaotic nebula. With inflation, it started to break into smaller clouds. Gravity pulled some of this gas and started to form stars. These stars, thanks to their energy, carved and shaped these nebulae.
Lower’s nebula, depicted in my attached picture, is a small remnant of this lengthy process.

CosmoSidewalk, to Astro Spanish
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It was the end of an astrophotography session, about 3:30 in the morning. I looked at Stellarium and found out that the huge globular cluster, the biggest we know of in this galaxy, with approximately 10 million stars, was out but low in my southern horizon. Decided then to take an hour and a half of one minute exposures just for fun, and this is the result: Omega Centauri from my rooftop!!!

CosmoSidewalk, to Astro Spanish
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Yesteryear did not take a picture of this big celestial rose. Yesterday I decided to give it a shot with my Rokinon 135 mm lens to capture it wide field. Though I used a OSC camera, I could through process create a Hubble-ish pallette. The central cluster of huge and very hot stars is catalogued as NGC2244.

CosmoSidewalk, to Astro Spanish
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This weekend I was able to escape to a dark site after a long time. The destination was a hidden getaway in the state of Guanajuanto, Mexico. I was able to see, with my naked eye the Andromeda Galaxy and, of course, the Milky Way. So I decided to shoot NGC1999. An object that is impossible for me to capture in my city’s observatory.
Only had the opportunity to capture a couple of hours, due to the unstable weather.

CosmoSidewalk, to Astro Spanish
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The idea is to present in a kind of unusual way an usual target, such as the well known Soul Nebula (SH2-199). This picture tries to achieve that.

First light of my brand new camera ASI533MC-PRO. My first cool camera! Took this from my rooftop in Mexico City.

CosmoSidewalk, to Astro Spanish
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Happy holidays, everybody! To celebrate, I share with you’ll my best picture ever of the Pacman Nebula (NGC 281)!

CosmoSidewalk, to Astro Spanish
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Couldn’t resist the temptation to reprocess my Trifid nebula (Messier catalogue number 20). Taken from the bottom of the profound light pollution sea of Mexico City last June.

CosmoSidewalk, to Astro Spanish
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I did not know that it is very probable that M74 galaxy hosts in its core not a supermasive but an intermediate size black hole of about 10000 solar masses. Though, this has not been confirmed yet. If indeed this is the case, then it will be the first intermediate black hole we have observed.
This was taken from my roof, in Mexico City. It is amazing that we're able to capture a distant object with off the shelf astronomy gear.

CosmoSidewalk, to Astro Spanish
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Lame picture, right?

Guess how many galaxies are in it...

(Slide to the right to get an idea)

image/jpeg

CosmoSidewalk, to Astro Spanish
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On June, during my birthday (or should I say birth-night?), I took the data to get this picture of the globular cluster M5. Although it was a few months ago, I did not have some "tools" in my Pixinsight arsenal, neither the bit of extra processing knowledge I have now (in this hobby you're continously learning something new). So, this is my today's version of that "old" picture. I do not want you to see the previous version -is kind of embarrasing.

CosmoSidewalk, to Astro Spanish
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Just enjoy this open star cluster at the center of the Heart Nebula, Melotte 15. Here you can find my favorite kind of stars: massive blue O and B type, according to Annie Jump Canon’s stellar classification. Surrounding this cluster is a good quantity of ionized hydrogen and oxygen. The false color technique I used is known as HOO, that I paired with “normal” RGB stars.
Took this from my roof (not the balcony anymore) in Mexico City.

thomasfuchs, to astrophotography
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The mythical Plane Engine Nebula

CosmoSidewalk,
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@thomasfuchs how do I dislike this nebula. Is a permanent feature of my sky.

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