RET

RET or Ret may refer to:

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Rhaetian people

The Raeti /ˈriːtaɪ/ (spelling variants: Rhaeti, Rheti or Rhaetii; Ancient Greek: Ραιτοί: transcription Retí) were a confederation of Alpine tribes, whose language and culture may have derived, at least in part, from the Etruscans. From not later than ca. 500 BC, they inhabited the central parts of present-day Switzerland, the Tyrol in Austria, and the Alpine regions of northeastern Italy.

The etymology of the name Raeti is uncertain. The Roman province of Raetia was named after this people.

Ancient sources characterise the Raeti as Etruscan people who were displaced from the Po valley by the Gauls and took refuge in the valleys of the Alps. But it is likely that they were predominantly indigenous Alpine people. Their language, the so-called Raetian language, was probably related to Etruscan, but may not have derived from it. At least some of the Raeti tribes (those in northeastern Italy) probably continued to speak the Raetian language as late as the 3rd century AD. Others (those in Switzerland) were probably Celtic-speaking by the era of the Roman emperor Augustus (ruled 30 BC - AD 14).

Alpha Reticuli

Alpha Reticuli (Alpha Ret, α Reticuli, α Ret) is the Bayer designation the brightest star in the southern circumpolar constellation of Reticulum, with an apparent visual magnitude of 3.3. This appears to be a solitary star located at a distance of 162 light-years from Earth. Although it is bright enough to be seen with the naked eye, the declination of this star means that it is best viewed from the southern hemisphere and is only readily visible below the tropic of cancer.

This star has more than three times the mass of the Sun and is about 330 million years old. The spectrum of this star matches a stellar classification of G8 II-III, with the luminosity class notation 'II-III' indicating it shows some traits of both a giant star and a bright giant. At this evolutionary stage, the atmosphere has expanded to almost thirteen times the radius of the Sun and the outer envelope has an effective temperature of 5,196 K. X-ray emission has been detected from this star, with an estimated luminosity of 3 × 10²⁹ erg s⁻¹.