Voyager: A Journey Through the Cosmos with Advanced Astronomy Software

What Is Voyager?

Astrophotography is really a problem of orchestration. On any given night you might be juggling a mount, a main imaging camera, a guide camera, an electronic focuser, a filter wheel, a plate-solver, and a weather sensor — each with its own software and its own failure modes. Voyager is the conductor that makes all of them work together automatically, so the rig runs a flawless night while you sleep.

Developed by Leonardo Orazi under the Starkeeper label, Voyager is a Windows application that connects to your equipment through standard ASCOM (and ASCOM Alpaca) drivers and ties in the tools astrophotographers already rely on — PHD2 for auto-guiding, plate-solving engines such as ASTAP or PlateSolve2 for pinpoint pointing, and a planetarium of your choice for picking targets. The result is a single platform that can find a target, centre it precisely, focus, guide, dither, flip across the meridian, and capture a full multi-filter sequence — then safely park and shut down at dawn, all on its own.

That is the key distinction the search results often blur: Voyager is not a star-chart or “sky tonight” app. It is automation and session-control software, in the same family as N.I.N.A. and Sequence Generator Pro rather than Stellarium or SkySafari.

What Voyager Actually Does

• DragScript automation. Voyager’s signature feature is DragScript — a visual, drag-and-drop scripting system that lets you build a complete night’s workflow (wait for dark, open the roof, cool the camera, image a target list, flip the meridian, run flats at dawn, park) without writing a line of code.
• Precise pointing with plate-solving. Voyager plate-solves frames to centre your target to the pixel and recover pointing automatically — essential for resuming the exact same framing across multiple nights.
• Automated autofocus. It drives your electronic focuser through repeatable focus routines, refocusing on temperature change or filter swaps so your stars stay tight all night.
• Auto-guiding and dithering. Tight integration with PHD2 handles guiding and dithers between frames to suppress noise and walking-noise patterns.
• Unattended reliability. Safety monitoring, weather-sensor support, and emergency suspend-and-resume let Voyager protect your gear and pick a session back up after clouds pass — the difference between a usable night and a wasted one.
• RoboTarget scheduling. In the Advanced edition, RoboTarget acts as a multi-night project manager, automatically choosing which target to shoot based on altitude, priority, moon, and how much data you still need.
• Array and remote control. Advanced can run multiple rigs at once (Array) and exposes a web dashboard plus the Viking remote app, so you can monitor or control an observatory from your phone or browser.

How a Typical Automated Night Runs

The clearest way to understand Voyager is to follow a single unattended session from dusk to dawn. A typical DragScript runs like this:

1. Wait for dark. Voyager waits for the Sun to drop below your chosen altitude, then cools the camera to its target temperature.
2. Open and unpark. If you have a roll-off roof or dome, it opens the observatory and unparks the mount — but only once the safety monitor reports clear, safe skies.
3. Acquire the target. It slews to the first object, plate-solves the field, and re-centres until the framing matches your saved reference to within a few pixels.
4. Focus and start guiding. An autofocus routine sharpens the stars, then PHD2 begins guiding and Voyager starts dithering between frames.
5. Run the sequence. It captures your planned exposures and filters, refocusing on temperature shifts and performing an automated meridian flip when the target crosses due south.
6. Switch targets or finish. With RoboTarget it can move to the next-best object as the first one sinks toward the horizon; otherwise it simply completes the list.
7. Dawn flats and shutdown. At morning twilight it can shoot calibration flats, then park the mount, warm the camera, close the roof, and stop — leaving you a finished, calibrated data set to process over coffee.

Every one of those steps would otherwise demand your attention at 3 a.m. Automating them reliably is the entire point of the software.

The Concepts Behind the Automation

Voyager automates several techniques that are worth understanding in their own right, because they determine the quality of your final image:

• Plate-solving compares a captured frame against a star catalogue to work out exactly where the telescope is pointing, letting Voyager correct the aim automatically instead of you nudging it by hand.
• Autofocus steps an electronic focuser through positions and measures star size to find the sharpest point — then repeats it as the temperature drops and the optics contract.
• Dithering shifts the framing by a few pixels between exposures so that, when the frames are stacked, sensor noise and hot pixels average away.
• The meridian flip is the moment a German equatorial mount must swing to the other side of the pier as a target crosses due south; Voyager performs the flip, re-solves, re-centres, and resumes without losing the sub-pixel framing.

If these ideas are new, our astrophotography fundamentals guide explains the imaging chain from first principles, and the pixel-scale guide covers how your camera and optics determine resolution.

Voyager vs. Voyager Advanced

Voyager comes in two tiers. The base Voyager license covers the core automation most imagers need: device control, sequencing, autofocus, guiding, plate-solving, meridian flips, and DragScript. Voyager Advanced — the edition this page is named for — adds the heavier, observatory-grade tools: RoboTarget multi-night scheduling, the Array multi-rig system, the web dashboard, and the Viking remote-monitoring app.

Licensing is subscription-based, and Starkeeper offers a free trial period so you can test it against your own hardware before committing. Because plans and prices change over time, check the current options on the official Starkeeper website rather than relying on figures quoted second-hand.

Voyager for Remote and Robotic Observatories

Voyager Advanced is especially popular with imagers who host their gear at dark-sky remote sites, sometimes thousands of kilometres away. The web dashboard and Viking app let you check on a session, tweak a plan, or shut down for weather from anywhere with an internet connection. RoboTarget keeps the rig productive every clear hour without your input, while the safety system stands guard against the things that quietly ruin remote setups — sudden cloud, wind, rain, or a dropped connection. Combined with the Array module for running several telescopes in parallel, it scales smoothly from a single backyard pier to a small robotic observatory. For many owners, that ability to trust a rig running unwatched, night after night, is the single feature that justifies the switch.

Who Is Voyager For?

Voyager earns its keep when you want imaging to be reliable and hands-off. It is an excellent fit if you:

• Run a remote or backyard-observatory setup that images unattended overnight;
• Shoot multi-night, multi-target projects and want a scheduler to manage them;
• Operate more than one rig and need to coordinate them;
• Value automatic recovery from clouds, equipment hiccups, and meridian flips.

It is less essential if you are doing casual visual observing, single-shot lunar or planetary work on Jupiter and Saturn, or just getting started and still learning the basics at the eyepiece. For those, a simpler capture tool is plenty until you scale up to long deep-sky sessions on faint targets like the Whirlpool Galaxy.

Voyager vs. the Alternatives

Voyager sits in a small field of serious astrophotography automation suites:

• N.I.N.A. (Nighttime Imaging ‘N’ Astronomy) — free and open-source, hugely popular, and very capable. It is the natural budget comparison; Voyager’s pitch against it is robustness, mature unattended recovery, and multi-rig management.
• Sequence Generator Pro (SGP) — a long-established paid sequencer with a loyal following and a lighter footprint.
• ACP and TheSkyX — observatory-control platforms aimed at advanced and professional remote setups.

The honest summary: if budget is the priority, N.I.N.A. is the place to start; if you want a polished, well-supported system built around unattended, multi-night reliability, that is exactly the niche Voyager targets.

Strengths and Trade-offs

Where Voyager shines: rock-solid unattended operation, intelligent recovery after clouds or errors, precise repeatable framing across nights, multi-rig coordination, and responsive development with an active user community. For anyone whose goal is to collect clean data while they sleep, those qualities matter more than any single headline feature.

The trade-offs: it is Windows-only, it carries a subscription cost where N.I.N.A. is free, and its depth means a learning curve — the first DragScript takes patience to build. It also assumes you already have a working, well-tuned imaging setup; Voyager automates a good rig, it does not rescue a poorly aligned or mechanically rough one. Most users find the reliability quickly repays the setup effort, but a beginner still mastering polar alignment and guiding may prefer to grow into it.

Getting Started with Voyager

The path to a first automated session looks like this: download the trial from Starkeeper, install the ASCOM platform and your equipment drivers, and connect your mount, camera, focuser, and filter wheel inside Voyager. Set up PHD2 for guiding and a plate-solver for pointing, then build a simple DragScript — slew, centre, focus, capture — before working up to a full unattended night.

A little planning up front pays off. Use our field-of-view simulator to frame your target, the astrophotography calculator to check exposure and sampling, and match your camera to your telescope before you ever automate the capture.

Is Voyager Worth It?

For casual stargazing or the first steps in astrophotography, Voyager is more software than you need. But once you are running long deep-sky sessions — especially unattended, multi-night, or remote — the calculus changes. The cost of the licence is small next to the value of every clear night turned into usable data instead of a half-finished session abandoned at 2 a.m. That is why Voyager, and Voyager Advanced in particular, has become a quiet standard among dedicated deep-sky imagers and remote-observatory owners. If your astrophotography has outgrown babysitting the mount, it is well worth the free trial.

Frequently Asked Questions

Is Voyager free? No — it is a subscription-licensed product, but Starkeeper provides a free trial so you can evaluate it with your own gear first.

What operating system does Voyager run on? Voyager is a Windows application. With the Advanced edition’s web dashboard and Viking app you can monitor or control it remotely from a phone, tablet, Mac, or browser.

Do I need other software to use Voyager? Yes. Voyager orchestrates other tools — ASCOM device drivers, PHD2 for guiding, and a plate-solving engine — rather than replacing them. A planetarium for target selection is optional.

What is DragScript? It is Voyager’s drag-and-drop automation builder, used to assemble an entire unattended observing session from building blocks without programming.

What is the difference between Voyager and Voyager Advanced? Advanced adds observatory-grade features: RoboTarget multi-night scheduling, the Array multi-rig system, a web dashboard, and the Viking remote app.

How does Voyager compare to N.I.N.A.? N.I.N.A. is free and open-source; Voyager is paid and is best known for its unattended reliability, automatic recovery, and multi-rig management for remote observatories.

What equipment does Voyager support? Through ASCOM and ASCOM Alpaca drivers, Voyager works with the vast majority of mounts, cameras, focusers, filter wheels, and rotators on the market, plus domes and roll-off roofs.

Can Voyager run a remote observatory unattended? Yes — that is its core purpose. Safety and weather monitoring, suspend-and-resume, RoboTarget scheduling, and remote dashboards are built for all-night, hands-off operation.