For centuries surrounded by the Nebula, and impossible to access, Bay 55R was explored when the nebula shrank revealing a number of small planets around the central star. Since then the system has been home to a wide variety of research establishments, though few have elected - or yet been given permission - to settle in-system. Planets:

Halo Bay (Bay 55R-2)

Damp and hot, mostly covered in low hills, Halo Bay is a swamp-ridden, tropical world covered with trees except in the deeper areas of the Halo Sea - the sea which circumnavigates the planet at the equator. Even at the poles the temperature rarely drops below freezing except near the peaks of the three mountainous regions.

Halo Bay Altitude & Climate
Note: The map below shows the planet, though with much of the vegetation removed to show heights: all but the highest peaks have some kind of tree-like vegetation. Orange shows the highest peaks - around 3000-3500m tall, low for mountains by almost any standard.

Over the years, Halo Bay's single moon has exerted a continually building and uninterrupted tidal attraction such that the difference between high and low tide in the Halo Sea is up to 20 meters: a perpetual wave around the planet. High tide turns the native giant, banyan-like trees into forests of kelp. Whilst, in general, the seas are shallow the tidal force has scored out undersea canyons where the water has been channelled between the major continents.
The planet is a rich source of highly useful and apparently adaptable bio-genetic material. Exploring scientists are constantly turning up strains of vegetation which have the potential for prolonging life, aiding healing or acting as a wide variety of drugs. As a result it has may corporate, Trade Federation and Republican research establishments, though all are at a loss to explain why such a planet contains such a concentration of life-giving vegetation and so few native animals without it being bio-engineered: but there is nothing in any archive which has the planet ever being inhabited.
At present, the various corporations who have established research centres on the planet are ensuring that future explorers are kept away until its secrets are fully tapped. Whilst none yet have distribution and production licenses for products developed from the planet's fauna, predictions suggest that various drugs similar to bacta or broad-spectrum anti-biotics might be possible, with minimal risk of rejection. No research institute has yet been able to seperate the elements that could enable these processes from the plants.

Bay 55R-4 Very fine Asteroid belt, few rocks being larger than a couple of meters in width - highly unnatural. This is also the subject of a great deal of research.

Crater Bay Altitude & Climate
Note: The orthographic views below show the planet as it can normally be seen in normal colour: the lowlands dark and the peaks in lighter greys and oranges).

Crater Bay (Bay 55R-5)

Large, barren, asymmetrical and surrounded by it's own asteroid belt and rings. The planet has numerous craters, perhaps part of a meteor bombardment, though perhaps also the result of an ancient cataclysm. Though large, gravity is much less than expected which has led explorers to suggest that either it is largely hollow, with a shrunken core, or has a non-metal core.

Though present in reasonable numbers on Halo Bay itself, the Scientific community has yet to fully explore the planet, being wrapped up in the far more potentially profitable Halo Bay. However, from time to time a researcher or scholar mounts an expedition to try and determine more about the planet. Reports of pirate or free miner activity in or around the barren planet (planetoid?) have been dismissed as mere rumour as there is no regular supply route established to the system.