A magnitude-4.83 G-type main sequence star. Surface temperature 5,778 K. The primary gravitational anchor of our operational theatre — source of the solar wind, radiation environment, and thermal loading that all Selenar instruments are rated against.

The innermost planet. No atmosphere to buffer thermal extremes — surface temperatures swing from -180°C in shadow to +430°C in direct solar exposure within a single Hermean day. High-radiation environment. All Selenar instruments rated to -60°C / +120°C standard; specialised variants available for extended Hermean operation.

A 96% CO₂ atmosphere at 92 bar surface pressure. Mean surface temperature 465°C — hotter than Mercury despite being further from the Sun. Sulphuric acid cloud layers at 45–70 km altitude. The most hostile planetary surface in the inner system. Selenar high-pressure instrument variants are undergoing extended qualification testing for Cytherean surface operations.

Origin point. Manufacturing base. Standard reference environment against which all Selenar instruments are calibrated. A 1-bar nitrogen-oxygen atmosphere, mean surface temperature 15°C, and gravity of 9.81 m/s² serve as the baseline. Every unit leaving our facility has been built and tested here — then specified for wherever it needs to go.

Thin CO₂ atmosphere at 0.006 bar — near-vacuum by terrestrial standards. Dust storms capable of encircling the planet. Surface temperatures from -125°C to +20°C. Gravity 3.72 m/s². The current near-term frontier for extended surface operations. Selenar instruments have been specified into several Mars mission instrument packages.

A broad band of rocky debris occupying the gap between Mars and Jupiter. Approximately 1.1–1.9 million asteroids larger than 1 km in diameter, the largest being the dwarf planet Ceres at 940 km across. Despite appearances, the belt is extraordinarily sparse — average inter-object distance exceeds one million kilometres. Selenar instruments are specified for asteroid proximity survey, mining precursor operations, and transit instrument packages.

The solar system's dominant gravitational body. Banded ammonia-cloud atmosphere with wind speeds exceeding 600 km/h. The Great Red Spot — an anticyclonic storm larger than Earth — has persisted for centuries. Intense radiation belts near the planet make deep proximity operations hazardous to unshielded electronics. Selenar rad-hardened instrument variants are currently in design review for Jovian probe applications.

The ringed giant. A system of ice and rock debris extending 282,000 km from the planet's core, yet averaging only 10 metres in depth. Mean cloud-top temperature -178°C. Saturn's moon Titan — with its thick nitrogen atmosphere and liquid methane lakes — is identified as a high-priority environment for future Selenar instrument deployment.

An ice giant with a methane-rich atmosphere that absorbs red light, giving the planet its characteristic cyan-blue colour. Axial tilt of 97.77° — Uranus effectively rolls along its orbital path. Internal temperatures estimated at up to 4,737°C. The least-studied of the outer planets; a dedicated Uranian probe mission is identified by multiple agencies as a priority for the 2030s.

The outermost planet. Wind speeds recorded at 2,100 km/h — the fastest in the solar system. Cloud-top temperature -218°C. Despite its distance of 30 AU, Neptune radiates 2.6 times more energy than it receives from the Sun. A single Neptunian year spans 164.8 Earth years. The operational envelope here is the outermost limit of current Selenar specification.

A vast disc of frozen debris extending from Neptune's orbit at 30 AU out to approximately 50 AU. Structurally analogous to the Asteroid Belt, but twenty times wider and composed primarily of ices — water, methane, ammonia. Pluto, Eris, Makemake, and Haumea are its largest known residents. The Kuiper Belt is the source of most short-period comets. At these distances, round-trip signal latency to Earth exceeds 13 hours. Instruments must operate autonomously and without intervention for mission durations measured in years.

Beyond the heliopause — where the solar wind terminates and interstellar space begins — lies the ultimate test of instrument endurance. Temperatures approach 2.7 K. Cosmic ray flux without solar wind shielding. No maintenance, no retrieval, no second chances. Two human-made objects have crossed this boundary: both carried instruments. Selenar is designing for the third.