This artwork depicts the personified Sol floating in space, quietly observing the Milky Way. Their path took them above the galactic plane, exposing the gigantic star-forming regions that the Solar System had come from located closer to the galactic centre, behind the dust clouds.

A Stop in the Solar Migration

The age and elemental abundance patterns of sun-like stars, and our understanding about how the Galaxy's chemistry evolves, hints that the Sun and maybe like them are immigrants to this part of the Galaxy.

#ACelestialJournal #art #astronomy #space #Sun

This artwork depicts a personification of Mars, with a notable difference: the north polar cap is much more extensive than it is today. Mars is tilted by 35 degrees, and has a relaxed expression. The tiny moon Phobos is visible in this image.

Mars's axial tilt oscillates with time due to gravitational interactions with other planets. When the tilt was higher than today, the polar ice sheets may have reached the mid-latitudes. Today, it is buried underground.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Mars

Artwork inspired by https://iopscience.iop.org/article/10.3847/2041-8213/adf06f This artwork depicts, to the right side, a picture of the candidate planet transiting its K3.5V host star HD 137010. The top left contains the image's title, "HD 137010's single transit" (with the word "single" underlined for emphasis), and the distance is 44.86 parsecs. Beneath the title is a depiction of HD 137010 b as an icy planet. Below the depiction of HD 137010 b is Enceladus excitedly drawing on their clipboard with some tools floating in the air. There is an information box introducing them as "Enceladus, Moon of Saturn". Terra, standing outside the image, questioned Enceladus's excitement by asking "Is it not too early to be depicting them?"

HD 137010 b

In which the little Enceladus excitedly draws a Terra-sized exoplanet candidate in Terra-like orbit that Terra told them about just now.

#ACelestialJournal #art #gijinka #astronomy #space #exoplanet #SolarSystem #planet #Enceladus #Terra #Earth

Enceladus really likes to brighten everyone's days up...or rather, their surfaces. I wonder why the same isn't true for Miranda or Ariel in the Caelus system.

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The Sun wears a pretty skirt so long that all the planets sleep in it at day.

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This artwork depicts a personification of Earth (Terra), as imaged by Apollo 17 in the famous "Blue Marble" photo. Terra looks pensive in this image.

The Blue Marble

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Mars, 4540 Ma ago. The personified Mars is sitting on a boulder on their moon, looking at the Sun. The abundant interplanetary dust lights up the orbital plane, a number of comets are observable, and a number of planets orbit interior to them. One shines luminously. Mars: "Another giant impact..."

2023-11-12: Ancient Mars 4540 Ma

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Mars

Personifications of Uranus (Caelus) and Neptune.

2023-11-06: Caelus and Neptune

The twin ice giants of the Solar System.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Caelus #Uranus #Neptune

4500 million years ago, Venus is shocked to see Terra with an oceanic hair. Venus: "YOU GOT LIQUID WATER ON YOUR SURFACE?" Terra: "Yes! Pretty cool, right?"

2023-10-29: When Terra first acquired ocean

Comic. Venus, 4500 million years ago, getting shocked when Terra showed that their entire surface has been submerged in water.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Terra #Earth #Venus

Personification of Venus, along with some doodles of them looking sad as Terra greeted them, Venus spending quality relax time with Mars, and them laughing with Io.

2023-10-27: Venus

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Venus

Personification of the Moon, drawn as photo taken by Apollo 12 (IIRC).

2023-10-12: AS11-44-6667 Luna

I think this one is from Apollo 12?

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Luna #Moon

Personification of Earth, drawn as the photo taken by Apollo 17.

2023-10-09: The Blue Marble (take 1)

Terra as seen from Apollo 17's famous photo. Outdated.

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Sol's rotation is mildly misaligned by 6 degrees. Tau Ceti's debris disc is moderately misaligned by 35 degrees. Ran's debris disc is misaligned by 95 degrees, and the young star is using their disc like a hamster wheel. These misalignments for Tau Ceti and Ran may be due to bad measurements one way or another, and should not be taken as accurate measurements.

2023-09-03: Disk Misalignment

Measurements of disc and stellar rotational inclinations hints at misalignments. While erroneous measurements are likely, I decided to make a comic out of it.

#ACelestialJournal #art #gijinka #astronomy #space #star

Personifications of two stars: Chara (Beta Canum Venaticorum; right), and Beta Comae Berenices (left).

2023-08-17: Chara and Bet Com

Two neighbouring stars, Chara (Beta Canum Venaticorum; right), and Beta Comae Berenices (left).

Although I learned about the fact from the Undertale fandom, the star is my namesake.

#ACelestialJournal #art #gijinka #astronomy #space #star #Chara #BetaComaeBerenices

Personifications of the Luhman 16 binary brown dwarfs. Both are depicted as pink banded objects where the poles are brighter and the equator is darker. Luhman 16 B is additionally depicted as stormy.

2023-08-16: Luhman 16 Siblings

#ACelestialJournal #art #gijinka #astronomy #space #browndwarf #Luhman16

Cuancoá (LTT 9779 b) responding to the announcement of the results of NameExoWorlds Contest 2022 Cuancoá: "So my new name refers to your sibling. Should I act like one now?" Terra: "Thanks, but no." "I have enough siblings already." Cuancoá: "Now, now. Don't be shy. I even look like them." Terra: "You don't." Voice from beyond the panel says "LESS SKIT, MORE ANNOUNCING PLEASE" To the left of Cuancoá is Kua'kua (LHS 3844 b), an airless rocky planet. Both are labeled by a white box with name and designation in it.

2023-07-11: Cuancoá, the Morning Star?

My third comic, a response to a paper finding very high albedo for Cuancoá (LTT 9779 b) (www.aanda.org/articles/aa/...)

#ACelestialJournal #art #gijinka #astronomy #space #planet #exoplanet #LTT9779b

Ran (Epsilon Eridani) is greeting Sol to their "Three Belts Club". Ran: "WELCOME TO THE THREE BELTS CLUB, SOL! Have fun with the stay!" Sol: "...Ran, what did you do to Fomalhaut?" Fomalhaut is seen in the background, head resting against the table. A holographic projection of a galaxy is present in front of them; it seems Fomalhaut had just lost a grand-strategy game against Ran.

2023-05-28: Three Belts Club

My second comic, a response to the tentative discovery of the "third belt" of the Solar System (really just scattered disc objects chillin' out there).

#ACelestialJournal #art #gijinka #astronomy #space #star #Sol #Sun #EpsilonEridani #Fomalhaut

Personification of Epsilon Indi A b. They are waving and smiling at the viewer, and the text says "See you in July!". Beneath it is the planet's name "Epsilon Indi A b" with an underline.

2023-05-17: Epsilon Indi A b JWST 2023-07

Inspired by JWST imaging this planet in 2023-07. This makes it, IIRC, the first solar-aged planet orbiting a main sequence star to be directly imaged.

#ACelestialJournal #art #gijinka #astronomy #space #planet #exoplanet #EpsilonIndiAb

Head-only views of the five inner planets: Terra, Venus, Mars, Luna, and Mercury.

2023-05-14: The Rocky Planets

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Earth #Terra #Venus #Mars #Moon #Luna #Mercury

2023-05-11: GJ 1214 b

Inspired by arxiv.org/abs/2305.06240

#ACelestialJournal #art #gijinka #astronomy #space #exoplanet #GJ1214b

Copernicus (55 Cancri A), as well as its five known planets.

2023-05-04 to 2025-05-16: Stars (extra)

Copernicus (55 Cancri A)

#ACelestialJournal #art #gijinka #astronomy #space #star

Ran (Epsilon Eridani), Sol’s Young Old Friend One of Sol’s closest interstellar friends at the moment. An active and immature star, they often cause concern and annoyance for the older star. Sometimes tease their much older neighbor, Tau Ceti.

Tau Ceti, the Third of the Trio The complete opposite of Ran, Tau Ceti is an old, silent, and reserved star, who is a more recent visitor of the Solar neighborhood. Their similar circumstances as solitary stars led Sol to befriend them.

Sol. A solitary, mature, and inactive star. Sol often spends time with Ran and Tau Ceti, but surprisingly their closest friends are instead Xi Boötis, a more distant pair of young stars. Despite what humans often believe, Sol’s color is white.

Tabit (Pi3 Orionis)

2023-05-04 to 2025-05-16: Stars

Ran (Epsilon Eridani), Tau Ceti, Sol, Tabit (Pi3 Orionis)

#ACelestialJournal #art #gijinka #astronomy #space #star

Personifications of Jupiter, Saturn, Uranus (Caelus), and Neptune.

2023-04-15: The Giant Planets

First designs for the four Solar System giant planets.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Jupiter #Saturn #Uranus #Caelus #Neptune

Classic Venus bantering with Terra. Terra: "Venus, why are you staring at me every time." Venus: "I admire you! Don't like it?" Terra: "IT'S CREEPY. STOP." Venus: "No can do~" Venus (outside speech bubbles): "Having a pleasant time?" Note: Venus's "admiration" for Terra seems to be an act. Terra does not reciprocate this.

2023-04-15: Venus's Stare

My first foray into comic-making: a single-image comic inspired by Venus's rotation causing it to point nearly the same face towards Earth during closest approaches.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Venus #Terra #Earth

2023-04-30: Introducing Intergalactic Crusaders Earth

My Earth character introduces the then-brand new Earth character (warning: Twitter link): twitter.com/Orion5Stella...

#IntergalacticCrusaders #ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Earth

Personified Sol looking at the viewer, who was reading a text. The text reads: An optical effect observed on stars. It causes the center of the stellar disk to appear brighter than the limb (edge) of the disk. This effect is caused by absorption of light by material in the photosphere - the further the photon has to travel within the photosphere, the more likely it is to get absorbed. The distance where the light is reduced to 1/2.718 is known as optical depth. Due to the spherical shape of the star, this distance passes through the most light-emitting material at the center of the stellar disk, and decreases towards the limb, as depicted in Figure 1. Additionally, materials at lower altitude have higher temperature. Blackbody radiation is proportional to the temperature to the power of 4, and thus hotter material that can be observed near the center of the stellar disk but not at the edge emits much more light. Figure 1: Idealized visualization of limb darkening.

2023-04-07: Sol - Limb Darkening

Half infographic, half experiment at blurring for depicting stellar limb darkening. It looked terrible, and I dropped that idea.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #Sol #Sun

Pluto. With a pensive expression, the dwarf planet gazes upon the images of their friends (Charon, Eris and Dysnomia, Makemake, Sedna, Orcus) and fragments of siblings lost to the giant planet instability. The personified character is standing on Pluto (celestial body).

Same as the other image, but with original brightness.

2023-04-04: Pluto ~ For the Present and the Bygone

Pluto is a bit of a tragic character. Their old home was destroyed, and they ended up subservient to the very person who destroyed it.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Pluto #Charon #Eris #Makemake #Sedna

Neptune, alongside a number of doodles, featuring: them being similar to Uranus (Caelus), being close to Saturn in the past, their moon Triton, their rings. There are also graphs of their relationships with dwarf planets. Neptune's hairstyle is actually roughly consistent with their modern hairstyle. More importantly, this artwork demonstrates the concept of mapping planets' dynamical interactions and relationships into relationships between their respective personified characters.

2023-03-31: Neptune.

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Io (left) looking excited, and Europa (right) looking more calm. Their clothes are meant to represent the aurora they both possess, with Io having yellow for sodium aurora (which makes them look a bit monk-like I guess), and both having red and green.

2023-03-23: Io and Europa. I distinctly remember hating drawing all the details on Io. I still do.

#ACelestialJournal #art #gijinka #astronomy #space #SolarSystem #planet #Io #Europa

Mercury, Venus, Earth, Mars.

2023-03-19: The Inner Planets

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