Orion A

Orion A

[ə‚rī·ən ′ā]
(astronomy)
A giant molecular cloud, 100,000 times more massive than the sun, mostly made of molecular hydrogen but best traced in the 2.6-millimeter emission line of 13CO, the rarer isotopic variant of carbon monoxide; the Orion Nebula is located in front of its northern part.
References in periodicals archive ?
PLANETS IN THE MAKING While O'Dell and his colleagues look at Orion as a whole, other astronomers are zooming in on specific regions within the nursery.
By the late 1980s, a combination of crushing debt, escalating costs and bad luck caught up with Orion as it lost heavily on high-priced projects like ``Valmont,'' ``Great Balls of Fire'' and ``She-Devil,'' while selling the rights to future hit ``The Addams Family'' to Paramount to meet expenses.