Tag Archives: seasons

Vokhtan calendar – complete

This is the final version of the Vokhtan calendar. It shows the interactions between the two suns and the planet with respect to seasons [roughly] and the day/night cycle [also roughly].

For the days, I made an executive decision and decreed that the Vokhtan day would comprise 24 ‘turns’. I chose the number 24 because I needed to dissect a circle into ‘wedges’ of time. Now, a circle has 365 degrees and a ‘wedge’ of 15.2 degrees goes into 365 almost exactly 24 times. This is something Corel Draw does very easily:

Now, when I place these wedges of time over the visuals of the planet, I get a kind of clock that tells me how many turns of bright light, red light, orange light and dark there are in the day at different times of the year:

Bright light = yellow sun Takh alone in the sky.

Red light = red dwarf, Takhti, alone in the sky.

Orange light = both suns in the sky at the same time.

Dark = truedark, i.e. when neither sun is in the sky.

This is a representation of a day in the middle of Piihoh. The red dwarf is completely eclipsed, so Vokhtah has just a simple, day/night cycle:

This next graphic is from the middle of Tohoh:

The day begins with almost 2 turns of Takh [yellow star] alone in the sky [because the planet rotates to the east]. Then Takhti rises and creates an orangey kind of light. When Takh sets, Takhti is alone in the sky for a couple of turns and it’s like a red twilight. When Takhti finally sets, truedark begins.

This next graphic is what the Vokh see in the middle of Kohoh – half red twilight, half bright yellow day, no truedark:

And finally, the graphic from the middle of Tuhoh. This is a mirror image of the same time during Tohoh but…this time, it’s the red dwarf that ‘rises’ first [because the planet rotates to the east]. It’s alone in the sky for a couple of turns and the inhabitants experience a red, gloomy morning. Then Takh [yellow sun] rises to brighten the gloom. At the end of the day, Takh shines alone. When Takh sets, truedark begins:

So there you have it. Time on Vokhtah has been tamed. Most days start with firstlight, progress to secondlight, peak at midlight, dim with firstdark and end with truedark. Middark is the halfway point of any dark cycle, while deepdark is the ‘dead of night’ and corresponds to the time between middark and firstlight.

Was all this work worth it, given that it was all based on guesswork?

Yes, for me, because I’ve never been good at ‘fudging’ things, and I desperately needed to know what Takh and Takhti might feel like, to a creature living on the planet.

Why didn’t I just get an astronomer to help me?

Because I don’t know any, and none of the websites I visited had what I was looking for. So I made my own. 🙂

As this post is more for my benefit than yours, I’ve turned comments off. 🙂

cheers

Meeks


Binary star systems

Since starting to write the Suns of Vokhtah series again, I’ve tripped up on some unexpected hurdles, one of which is the effect the binary star system has on the day/night and seasonal changes as experienced on the planet.

I thought I’d worked it all out over five years ago, and I do have graphics to prove it, but as I looked at those graphics I realised that I couldn’t remember the thinking behind them:

Was it actually right? I no longer knew. And it niggled so much I knew I had to go back and reinvent the wheel. So these are the earliest of the new graphics:

Creating the day/night cycle in Corel Draw 8 stage 1:

As you can see, the planet obits the G2 [yellow] star in an elliptical orbit which makes EVERYTHING so much harder. The lines connecting the centre of the star to the centre of the planet are always at right angles to simulate the orientation of the planet to its star. Assuming the star and planet exist on a flat plane, I think that’s right, from the point of view of geometry. Seems logical, but I know very little about actual astronomy.

Anyway, the big yellow star is Takh and the small red one is its binary companion, Takhti.

Next step in Corel was to group the positions of the planet, and flip a copy of them horizontally. A bit of realignment was necessary to get it looking like this:

And finally, I filled in the gaps at the top and bottom:

I haven’t modelled the effect of the dwarf red star yet, so it’s hard to see the significance of the example at the very bottom, but mid-Piihoh is the time in the planetary cycle when the dwarf red sun is completely eclipsed by the G2 star.

The example at the very top is mid-Kohoh. This is when the planet experiences virtually no dark – i.e. night time. Again, this will become more obvious once I complete the red dwarf overlays. Of course, working /that/ out requires some hefty mental shifts on my part because the planet rotates in an easterly direction around its own axis, but revolves around the G2 sun in an anti-clockwise direction…

Nevermind, I sort of know what I’m doing, but it still gives me brain-ache.

cheers

Meeks

 

 

 

 

 

 

 

 


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