Updated Helios' comets

Updated binary orbit parameters

- Changed Zerk into a brown dwarf
- Re-classed Zerk's moons to planets
- Added custom cloud textures to Xenolith

- Updated Astrus's radius
- Added a new ring texture for Zerk (Credits: ParticleGrasp, SevenSpheres, annd The Sun)
- Changed Zerk into a sub-brown dwarf-like object

Added city lights to the following objects:
- Akira
- Celis
- Cryptic
- Horus
- Leo
- Loki
- Nexus Legendary
- Radon
- Selene
- Vague
- Verdant

Added the RingsWinter effect to both Astrus and Zerk

- Replaced Helios with a more massive and luminous white main sequence star
- Replaced Nexus Ab with an orange dwarf
- Expanded the orbits for Helios's planets outwards
- Fixed Celis's ESI (Now back at 1.000)
- Turned the three planets which orbit Nexus Ab into lava planets

- Revamped the orbits of all stars to be more realistic (Structure semi-based off of Nu Scorpii)
- Adjusted all planet and dwarf planet orbits
- Removed old asteroid belt
- Added a new asteroid belt around all groups of stars (Nexus A, Nexus B, Nexus C, and Nexus D (FYI: They're the names of the barycenters))
- Fixed Vex's glitched comet tail
- Adjusted Typhos's orbit to simulate a captured object (Slightly exaggerated)

Made Astrus's colour slightly more vibrant

- Updated semimajor axis for Ephyra A
- Fixed temperatures for both Ephyra A and B
- Added eccentricity and inclination values to Astrus's major rocky moons
- Added eccentricity values to Nexus Ultima's major moons