Theta 1 and Theta 2 Orionis are two multiple-star systems within the Orion Nebula (M42). Theta1 includes several stars; the four brightest comprise the Trapezium star cluster at the heart of M42.

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FU Orionis is actually a double star, consisting of two separate stars that probably orbit each other. One is about as massive as the sun, while the other is only 30 percent to 60 percent as massive.

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FU Orionis is the prototype of a class of novalike variables that undergo some of the most extreme variability seen in pre-main sequence stars. FU Orionis and its kin characteristically flare by ...

BOSTON & GHENT, Belgium--(BUSINESS WIRE)--Orionis Biosciences, a life sciences company pioneering innovation of highly selective and tunable therapeutics for cancer and beyond, today presented ...

A star about 1,360 light-years away from Earth, named FU Orionis, is twice as hot as astronomers previously suspected, according to recent data from the Hubble Space Telescope. In fact ...

Iota Orionis is a binary star system and is easily visible with the naked eye, being the brightest star in the constellation Orion's sword. Its unique variability, reported in the journal Monthly ...

Image Credit: European Space Observatory [ESO] Peekaboo! APEX sees you! In this newly-released image taken by the Atacama Pathfinder Experiment (APEX) telescope in Chile, high-mass stars twinkle ...