Groombridge 1618 is a solitary orange dwarf star located a mere 16 LY from the Sun in the constellation of Ursa Major (the "Big Dipper"). 

There are two naming conventions at work here. The lesser used involves maple trees while the second is of unknown origin. In a torch orbit is the first planet, Rubrum. Named for Acer rubrum, the red maple, it a mostly deep blue in colour due to lack of cloud formation. Occasionally bands of different colours streak across the surface as convection stirs up chemicals found deep below the surface hazes. Even though it is less massive than the other two ice giants in the system its radius is larger than either of them due to thermal expansion from being so close to the sun. Also close to its sun but located in the inner edge of the habitable zone is the terraformed planet of Grroom. The spelling is unconventional as the two r's aren't required. Initially the planet was lifeless with barren continents of rock and dead oceans as well as being tidally locked to the sun. There was little atmospheric processing required before humanity introduced life to the world and now large swaths of lands are covered in semiarid flora that host a thriving ecosystems. The day-night issue was solved not with human technology but with something stranger. A series of three giant stations gifted to humanity over 400 years prior were put in orbit low above Grroom's atmosphere. Giant pillars of energy were projected into the surface, applying a torque that reached all the way into the deep mantle. The process is still ongoing and little is known about the alien "Spin Generators". It should be noted that the area immediate to where the energy beams penetrate the surface is a glassy abyss devoid of life. The third planet is a cold desert super-Earth named Mercury. It doesn't appear to be named after the Ancient Roman god but no sources can be determined with certainty. Its atmosphere is dominated by nitrogen (~85 %) but at 'sea level' is only a quarter as dense as Grroom's. For the most part the planet is covered in rocky or sandy deserts that obtain their colour from iron oxides and silica. The polar regions are covered with prominent ice caps and in the eastern hemisphere there is a large patch of grey volcanic rock that has been found to be only 14 million years old. The lickely cause is not a single volcano but rather multiple vents opening up in the crust, releasing magma constantly for several thousands years. There are known as flood basalts and evidence has been found indicating older and much larger events in the planet's past. Nye and Saccharum are the fourth and fifth planets, respectively. Nye is larger and more massive than Saccharum. Saccharum gets its name from Acer saccharum, the sugar maple. Nye is a textbook ice giant when it comes to composition: mostly hydrogen and helium with some methane to boot. Saccharum on the other hand is devoid of helium and has a greater than normal concentration of ammonia. The reason for this is entirely unknown. The very last plant is Homey, a sulfur rich gas giant. Homey plays host to a large contingent of moons that, like their parent, contain more sulfur compounds than is usually found elsewhere.