Architects of software designed to expedite the study and application of ancient astrology.
Lux in Tenebris
Our tools are crafted for the curious soul, designed to be a companion in your exploration of the ancient arts. Discover the timeless laws that have been passed down through the millennia and weave the ancient wisdom into the fabric of a better tomorrow.
1macOS with Apple M-Series processors supported
2Internet needed only for license activation
Free ephemeris generator
Generates standard geocentric, topocentric, and heliocentric ephemerides across any date range, with a time resolution down to hours. Select celestial bodies, choose tropical or sidereal zodiac and reference planes, then export to CSV or copy as Markdown or tab-delimited text. Free to use—available on the Downloads page.
Advanced ephemeris generator
Everything Ephy can do, plus a finer time resolution down to minutes and seconds, Diurnal Cardinal Points, and Aspect Ephemeris study types that compute the angular relationships between celestial bodies from each perspective.
Astrological event generator
Generates tables of astrological events across any date range—a configurable, high-precision event generator built for serious research and study that includes over 40 mundane and natal study types. Everything from Mundane and Transiting Aspects to Heliacal Phenomenon and Planetary Cycles is featured.
License activation utility
Used to activate and deactivate licenses for purchased Rhythm Seven Software applications across your computers. Enables the deactivation of a license on a computer and then the reactivation on another without having to contact support.
Built for astrological research, Cygnus is a high-precision desktop application for generating ephemerides. It computes planetary positions across any date range, delivering publication-grade tabular data you can trust for serious work.
Choose from multiple calculation perspectives including geocentric, heliocentric, and topocentric viewpoints, each available in standard and aspect variants, giving you the flexibility to approach your research from exactly the angle you need.
Take Cygnus for a test-drive and see if it's the right fit for you. A 15-day trial license will be automatically created when the application is installed for the first time.
Download for Windows 11 (x64) Download for macOS (M-Series)Cygnus provides six distinct study types to cover every aspect of ephemeris research. Generate standard geocentric, topocentric, and heliocentric ephemerides, or switch to their aspect variants to compute angular relationships between celestial bodies from each perspective.
Tailor every study to your exact requirements. Define custom date ranges and time intervals, select from a comprehensive list of celestial bodies, choose between tropical and sidereal zodiac systems, and configure reference planes to produce the precise data your research demands.
Explore your ephemeris data in a professional tabular display designed for serious research. Control displayed metrics, resize and reorder columns to suit your workflow, search by date to jump to any point in time, and monitor record counts to stay oriented within large datasets.
Take your data wherever it needs to go. Export complete studies to CSV files for use in spreadsheets and external analysis tools, or copy selections to the clipboard as formatted Markdown tables or tab-delimited text for seamless integration into your documentation workflow.
Accelerate your workflow with a comprehensive preset system. Save and apply ephemeris presets and body list presets to instantly configure new studies with your preferred settings, and set application defaults so every new study starts exactly the way you want.
Organize your ephemeris studies within workspace files for clean, structured research. Activity indicators keep you informed of running calculations, and unsaved changes protection ensures you never lose work. Navigate, reorder, copy, and manage studies with ease.
Aquila is a desktop application that generates tables of astrological/astronomical events with stunning speed and accuracy thanks to the highly optimized search algorithm under the hood.
Gain the bird's eye perspective that you need to quickly determine critical dates and periods of time by utilizing Aquila's diverse set of study types that cover a vast range of astrological and astronomical phenomena.
Study the past and soar into the future with Aquila! A 15-day trial license will be automatically created when the application is installed for the first time.
Download for Windows 11 (x64) Download for macOS (M-Series)A Workspace is your container for every line of astrological inquiry. Dedicate an entire Workspace to a client, group of people, the trajectory of a financial instrument, the destiny of a nation, or even the narrative arc of novels and movies. Workspaces enable you to organize complex research and explore any subject while remaining organized.
Aquila is built upon a flexible study architecture. Use Generator Studies to unearth vast datasets of specific cosmic events. Then, weave those findings together with Timeline Studies to reveal the overarching narrative, transforming raw data into profound astrological insight.
Generator Studies allow you to scan centuries in seconds, pinpointing everything from Mundane Aspects and Retrograde Cycles to complex configurations like Grand Trines, T-Squares, and Yods.
Your results materialize in a fully customizable table built to manage millions of events with blazing speed. Tailor your view by including only columns that you need and reorder columns by dragging and dropping.
Achieve surgical precision in your research with the optional Event Filter. Go beyond standard searches and ask the cosmos hyper-specific questions. This powerful tool empowers you to test the most nuanced astrological theories with definitive clarity.
Witness the convergence of disparate events and see the grand design emerge. Timeline Studies aggregate events from a customizable selection of Generator Studies into a timeline, providing the comprehensive bird's eye view that is essential for seeing the bigger picture.
The event data is elegantly simplified into a clean, two-column view containing only dates and event descriptions. This clear presentation empowers you to rapidly understand the confluence of key events, all without the disruptive process of switching back and forth between individual studies.
Gain absolute confidence with Aquila's timekeeping system. Powered by a comprehensive, professional-grade global time zone atlas, the system eliminates the complex task of managing time zones and DST rules, freeing you to focus purely on your astrological work.
Simply enter a location's coordinates, and Aquila does the rest. The correct local time zone will be automatically applied, along with any historical DST rules, for any date anywhere in the world. Your calculations are now faster, easier, and more accurate than ever.
Streamline event documentation by right-clicking a selection of events in the events table to open a context menu that provides options for copying the selection.
Events can be copied as a formatted Markdown table (ideal for note-taking apps like Obsidian, Notion and Joplin) or as a tab-delimited list for seamless integration into spreadsheet programs such as Microsoft Excel.
The testimonials that appear below have been kindly provided by genuine users of our software products.
Mundane Planetary Aspects from 1792 til 2050. Exported to Excel and all-important days for the next few months easy to see, so easy to plan for the upcoming week.Erik
I have been able to test it out over the last few days and am really excited at the kinds of lists you can create with it. It's a huge time saver for me.Henry
I'm enjoying using Aquila. Thanks for writing such a great program!Richard
Pay once and own forever with no nasty surprises. You will be up and running in a matter of minutes thanks to our automated licensing system.
Generate professional grade ephemerides with a Cygnus lifetime license.
Study the past and soar into the future with an Aquila lifetime license.
