07 March, 2026
Anxious Crows in Space
09 March, 2023
SCIENCE&ARTWORK | BINARY STAR SUNDIAL | PART 2
WHAT ABOUT DIFFERENT STARS?
Given this solution, any ordinary Earth sundial works in such world, for as long you consider this modified equation of time for your planet, just look for the darker shadow whenever checking the time.
KEEPING TIME AROUND AN 8-SHAPED ORBIT???
Now, since it is not the goal of the project to be 100% Interstelar-level physics plus some magic dust sprinkled on top, I'm not getting into how to plan those orbits, or how no planets could form under such conditions, let's just exercise and have fun, because some realities are just sad.
At different points of the orbit, the night/dark sections of the planet would point towards different constellations of the local zodiac, ex; some constellations appear on the east only if you're approaching the smaller stars, while the same constellation appears on the west as you leave that star - because the planet is now facing the other direction.
As the planet races from one star to another, the apparent size of the stars in the sky changes, and a safe way to measure this is through a pinhole projection, since the projection size is always proportional to the object's true size in relation to its distance from the observer.
R/D = r/d
SCIENCE&ARTWORK | BINARY STAR SUNDIAL | PART 1
IS IT POSSIBLE TO CONSTRUCT A BINARY STAR's SUNDIAL?
WHY?
So this last week I've been trying to work on my own sundial to settle up an argument (with a flatearther, ugh), It works pretty nicely and got bit damaged by rain since it is made of paper, but my brief study of Gnomonics got me pretty interested in the craft as a whole, there are 'easy' and 'hard' ways to make sundials and solar calendars. You can scroll right to the end if you're not interested in the whole thought process behind its end design.
If you look at my design, you will notice a straight line, and two opposing hyperbolae, the straight line is called the Line of Equinoxes, it is where the shadow of the gnonomon falls during the Autumn and Vernal equinox days (Equinox or Equinoctis meaning "equal nights") - the two opposing hyperbolae are the Solstice lines, where the shadow falls during the summer and winter soltices respectively, by marking intermediary hyperbolae one can mark the passsages of months and weeks through the solar cycle.
Because of the Earth's tilt, one can draft a simple grid like the one I did by constructing a spherical grid marked 23.5° north and south of the equator, then putting a light source at its center, then tilting said spherical grid to the user's latitude - the resulting projection onto a sheet of paper will be your markings, and the distance from the paper to the center of the sphere is the same from the plate to your gnomon's tip, which is what you can see I rendered in the 3D software, then printed.
Without a 3D grid (physical or virtual), it takes a lot of math to traditionally work out the specific lines you'll need for you sundial, that's why the ancients often cut the middle-man and just projected their sundials onto convex hemispheres and rings!
There is a whole bunch of other types of sundials each specific to what their projectionists wanted to be told by the sun as well, but do any of those work for a world with two suns?
THE SETTING
First of all, a quick googling of "Binary Star Sundial" retrieves not a lot of material, if someone has ever worked on anything like that, they didn't publish it on the internet, there are a couple posts on stackexchange and reddit dating back to 2016 but no solutions, most of them assume you can get away with a normal sundial since the shadows created onto a circumbinary planet would mostly be off by about 10° maximum - but this would only work as an approximation, depending on the specifics of the system, this would mean the clock could be offset by about 1h of the actual time (assuming the planet has 24h day/night cycle).
So before tackling the problem as a whole, let's see what changes from the traditional Terran sundial, so we can better know what challenges lie ahead:
DIFFERENCES BETWEEN SOLAR AND BISOLAR CLOCKS
In the traditional solar clock, one can assume an inertial reference point, that could be either the static Earth with the Sun moving around it, or the static Sun-Earth system, with the Earth rotating around its axis.
On a bisolar clock, we have to consider not only either of those scenarios, but also that the suns are not static in the sky, they revolve around a common center of mass. Which means that for either scenario, the suns would always move significantly on a day to day basis - what would in itself, create a solar subcycle our natives to work with.
On Earth, the Ecliptic plane is the apparent path of the Sun across the sky throughout the year, it is pretty easy to follow through and it is what defines the constellations of the zodiac. On a circumbinary system however, one could either define the ecliptic as the planet's orbital plane, or the star's own orbital plane, in either case, both stars would constantly fall above and below the ecliptic as they orbit each other. Which means that the difference in orbital inclination between the stars and observer planet would change throughout the year as well. Anyone familiar with tracking the movements of Mercury and Venus in the sky will known how crazy the paths can look.
Because all of those movements are specific to the times and cycles at play, I will outline my process with an example so you can work out your own models of bisolar clocks. Since we cannot experience such a place, I will be using 3D software to simulate what it should look like based on the model stats given in my sketch.
UNDERSTANDING THE SKY
To keep things simple, I will work with geocentric coordinates, swapped the Sun in the solar system by a pair of twin stars with 80% of the mass, just so the brightness matches just the same on our planet, which had its tilt reduced to 20°. The star's also orbit each other at an angle of 5° from the planet's orbit.
Although for an external observer, the twin suns orbit each other every 36.1 days, the planet which is also orbiting the stars do not perceive this as being 36 Earth-days, we need to calculate the synodic period of the stars by using:
Which works out to be 41.25 Earth-days, or 990 hours, now we can use this information to set up the planet's rotation into some neat value that's easier to work with.
I will set the planet's rotational period to about 36 hours, this gives us a simple 10° per hour rotation, it approaches the solar subcycle to roughly 27.5 sidereal days (similar to a lunar month) - and makes the year about 192½ days. Meaning our stars move 13.1° over the course of a day, and half as much during daytime.
The maximum elongation or separation between the suns in the sky would be about 14.5°, and this gives us another interesting alternative to measure the solar day, Mean Solar Time, which is measured from the barycenter, considered static while the suns orbit around it.
DESIGNING THE HOROLOGIUM BISOLARII
PRELIMINAR EXPERIMENT
An anallematic sundial consists of a vertical gnonom which marks the time throughout the day, but also tracks the months through the solar anallema by the length of the gnomon's shadow.
On Bisolaria, such an anallematic clock would produce two shadows which dance with twice the speed of the suns orbital period.
So throughout the years, we would see the suns eclipse each other only during the planet's passage through the nodal line, where the sun plane crosses the ecliptic plane. We would also see the sun plane appear to tilt north or south as we cross the south and north pointing sides of the orbit, which by itself would be a good teller of seasons.
05 October, 2022
NON-FICTION | THE ONLY UFO THEORY I'M NOT SO SKEPTICAL OF
DO I WANT TO BELIEVE?
Falsifiability, is the capacity for some proposition, statement, theory or hypothesis to be proven wrong.
THE ALIENS ARE STRANDED IN THE SOLAR SYSTEM
VARGINHA AND ROSWELL INCIDENTS
The Roswell Incident (1947) doens't require much presentation, but I wanna drag your attention to its less known counterpart, the Varginha Incident (1996). Much like the american incident, there was heavy military involvement, and attempts to keep curious and civilians away from the case, and apart from the movie stereotype of aliens arriving to speak to the president of the US, it happened in a third world country with no spectacle, and several civilizan witnesses with no previous history of such events in the very interior of Brazil, too serious to be ignored.
THE CONSPIRACY TIMELINE
You guys remember the black object that interacted with the Sun back in 2012? Here's official footage in case you doubt it is real. And here it appears again in 2018, and here is a report of it appearing again for 8 days during last month. How long has this object been around? How long have we been really watching the Sun to look for it? I know many artifacts and errors can occur in instruments and this could be diagnosed as such, maybe, somehow, but what if it doesn't? Should we expect the huge 10 Earth-radius object to appear again in the following years? In my opinion, we won't see it again after 2030-2040.
The theory of planet Vulcan really took off in the 1800s, when again, two objects were seen crossing the sun's disk through telescope, although the objects seen between 1818 and 1837 were much smaller, if you assume a distance of 100 million km from Earth (close to the Sun), the size of the larger object is around 1500 km wide, half the size of our Moon.
HIGHLIGHTS
SCIENCE&ARTWORK | BINARY STAR SUNDIAL | PART 1
IS IT POSSIBLE TO CONSTRUCT A BINARY STAR's SUNDIAL? WHY? So this last week I've been trying to work on my own sundial to settle up ...
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IS IT POSSIBLE TO CONSTRUCT A BINARY STAR's SUNDIAL? WHY? So this last week I've been trying to work on my own sundial to settle up ...
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Last updated: August 22nd 2026 GENERAL GEOGRAPHY The Dominion is a region of space located behind the Coalsack Nebula as seen from Earth...





