Zodiac celestial coordinate system, or more specifically an ecliptic coordinate system, which takes the ecliptic as the origin of latitude and the Sun's position at vernal equinox as the origin of longitude. The English word ' derives from ', the Latinized form of the Ancient Greek "zōidiakòs kýklos" (), meaning "cycle or circle of little animals". "Zōidion" () is the diminutive of "zōion" (, "animal"). The name reflects the prominence of animals (and mythological hybrids) among the twelve signs. The zodiac was in use by the Roman era, based on concepts inherited by Hellenistic astronomy from Babylonian astronomy of the Chaldean
Name-letter effect than attractiveness. They suggest it may be useful to use not just initials but all name letters for measuring implicit self-esteem, something which Hoorens says is her most important recommendation. The Letter Preference Task has been used to measure implicit self-esteem in contexts as diverse as depression, physical health, social acceptance, unrealistic optimism, feedback sensitivity, self-regulation, and defensiveness. Researchers have looked for wider implications of the name-letter effect on preferences, both inside and outside the lab. In controlled studies in the lab, Hodson and Olson tried to find evidence of people liking everyday things (e.g. foods, animals) that matched their