Q2019‘Quadrants’ was part of my worldbuilding series on the AtoZ Challenge for 2016.  I’m doing flashbacks from my seven challenges in honour of the Tenth Anniversary.

I have a science fiction series that goes by the name of the Viridian System series.  In the second book, our heroes get stranded in the Delta Quadrant after accidentally going down a wormhole.  I decided that this phenomenon needed further explanation.

Quadrants (2016)

My theme this year is ‘world-building’ and for Q I’m going as far as the whole galaxy!

QIn my Viridian System series, I decided to define the structure of my Milky Way galaxy, just in case my characters decided to locate planets and star systems at any time.  It may not be necessary for the story, but I know the four quadrants of the galaxy. The Delta quadrant is least explored by the inhabitants of the Alpha quadrant, who are the ones who think they matter, and then mostly only in the innermost sector, near the heart of the galaxy.

Most of the action is focused on the Alpha quadrant. This is home to the Imperium, the Federation, and most of the ‘known’ trade and enterprise.  The Delta quadrant is home to the Jakochi Alliance, which becomes important to me in Book 2. This book also includes a foray into the Gamma quadrant, and a note that there are extraordinary aliens in the Beta quadrant, so nobody goes there much!

Galactic Quadrants

Wikipedia gives a lovely account of the Galactic Quadrant system as we have it today, which is geocentric – the sectors are based on observations made from Earth, so have Earth at the centre.  I have assumed that in 800 years we have mapped the galaxy from the centre and not an obscure star in an outer spiral arm.  My approach has some resonance with the Star Trek approach, but is not identical.

Quadrants are shaped like a segment of an orange, their narrowest edges meeting at the axis of the galaxy. The core of the galaxy is a fifth navigation area, but is generally too dense to allow useful space travel. Each quadrant is divided for navigation purposes into sectors; innermost (primary sector), 6 secondary sectors (equator, medial and pole, each labelled North or South, and usually referred to by letter e.g. NE is north equator). Outside each secondary sector there are nine tertiary sectors with no outer limit, designated by their secondary sector followed by a designation according to position, so, NP1 is one of 12 tertiary sectors that meets on the north axis of the galaxy: Alpha NP1-3, Beta NP 1-3, Gamma NP1-3 and Delta NP 1-3 all surround the northern axis – it is virtually empty space.

Off the spiral arms

Any star system in the tertiary system off the plane of the galaxy – the spiral arms – is bound to be a long way away from anywhere else.  The Viridian System falls into this category. It isn’t far above the plane, and gets a good view of the Milky Way (side on) at night.  Distances take a long time to traverse, even using warpshift.  I made a table for myself of how long it would take to travel various numbers of light-years at different warp factors (times the speed of light).  Weeks, months, years, centuries… so there are some useful wormholes around the place, artificial ones that are stable conduits between one part of a quadrant and another. One called The Sleeve provides a short-cut between the Alpha and Gamma quadrants (through the Delta quadrant).  It’s not the safest of places right now.

There are also unstable wormholes.  They are definitely not safe.  Nobody would want to encounter one of those.  You never know where you might end up.  Possibly in Book 2 of the Viridian System series, being written at Camp NaNoWriMo right now!! [Curved Space to Corsair]

PS.  Most maps of the Star Trek universe have the Beta and Gamma quadrants on either side of the Alpha, and Delta opposite.  This one, from Strait.org, has the same layout as mine, which harmonises with graphical quadrant concept in mathematics.


First posted 20th April 2016



centre of galaxy
An image of the area surrounding Sagittarius A*, the supermassive black hole at the center of the Milky Way galaxy, in X-ray and infrared light. X-ray: NASA/UMass/D.Wang et al.; IR: NASA/STScI

In the 3 years since I wrote this, we have managed to get pictures of the theoretically expected black hole at the centre of our galaxy.  See this article from Astronomy magazine.


More strange is that the plane of the galaxy is not flat, but sort of wavy, like a slightly twisted toroid.  Thinking about that, it’s not really surprising. Have you ever seen those dancers called the ‘whirling Dervishes’? They spin madly and have skirts that fly out.  There is a tendency to have undulations in the skirt as it spins.  It’s probably all part of the same thing.

This article from EarthSky.org tells more.

warped galaxy quadrants
This galaxy – labeled ESO 510-G13 – is an edge-on warped spiral galaxy. Similar to the Milky Way it has a pronounced warp in its gaseous disk and a less pronounced warp in its disk of stars. Image via NASA/Space Telescope Science Institute.
Mapping the galaxy - Q for Quadrants - fictitious and recent developments in research #atozchallenge #science Click To Tweet
Quadrants – an #AtoZchallenge #Flashbackfriday post

2 thoughts on “Quadrants – an #AtoZchallenge #Flashbackfriday post

  • 19 April, 2019 at 11:51 am

    Ooooh, spacey!!! I love images of space and discussions on what’s out there based on what we’ve seen and what has been guessed. Love this!

    J Lenni Dorner~ Co-host of the #AtoZchallenge, Debut Author Interviewer, Reference& Speculative Fiction Author

    • 19 April, 2019 at 9:23 pm

      Thanks, J. I often pop these links into blog posts on my Viridian System series website… as much for some content as anything else, since if I’m not working on it, there’s nothing much to report to my readers 🙂


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