Definition: The word 'Adelarthra' refers to the name given by the ancient Greeks to a group of 24 minor constellations that were originally thought to represent the planets around the sun but which are now believed to be in fact stars. The constellation Adelarthra is also known as the constellation Adelithos. It is located between the constellations Lyrmachia and Ananias, in the southern sky at the right of the north celestial pole. The name "Adelarthra" was applied by the ancient Greeks to represent the planets that were originally thought to be located on this constellation. The constellation Adelarthra consists of 24 minor constellations, which are named after different minor planets. Each minor planet is assigned a number ranging from 1 to 6, with the number representing the position in the sequence of orbits around the sun or the positions of each planet when viewed in its own orbit. The names of these minor constellations have been derived from their specific properties and orbits. For example, the constellation Lyrmachia is named after the Greek word "lyre" which means a harp or musical instrument, while the constellation Ananias is named after the Greek word "anias," meaning "a small bird."