A large and bright constellation on the equator, between the stars Aldebaran and Sirius. It contains a remarkable nebula visible to the naked eye.

(Greek mythology) a giant Boeotian hunter who pursued the Pleiades and was eventually slain by Artemis; was then placed in the sky as a constellation

a constellation on the equator east of Taurus; contains Betelgeuse and Rigel

See constellation.

Ontario Research and Innovation Optical Network. A network that provides high-speed connectivity to Ontario's research and educational institutions, and links them to each other and to similar organizations around the world.

Ocean Research Interactive Observatory Networks

Orion is a manned spacecraft currently under development by the United States. Prior to receiving its current name Orion was known as the Crew Exploration Vehicle (CEV). The new spacecraft will replace the current Space Shuttle fleet after the three remaining orbiters are retired in 2010, and will be launched from Kennedy Space Center on the new Ares I crew launch vehicle.

ORION (the Ontario Research and Innovation Optical Network) is a Research and Education (R&E) computer network in Ontario, Canada. It connects Ontario's research institutions, including every university, most colleges, several teaching hospitals, and a few school boards to one another and to the global grid of R&E networks using high-speed optical fibre. With more than 8,200 km of optical fibre running through 22 points of presence in major centres in 21 cities across Ontario, ORION is one of the largest research and education networks in the world.

Orion is a fictional character, a superhero and member of the New Gods that appear in the . He first appeared in New Gods #1 of "Jack Kirby's Fourth World", and was given his own title in 2000.

In the fictional Star Trek universe, Orions are a green-skinned alien species which seem to have a hostile attitude toward the Federation.

Orion is a science fiction/fantasy manga by Masamune Shirow, first published in 1991 by Seishinsha. The plot revolves around the Yamato Empire's plan to destroy all the galaxy's negative karma, and its disruption by Susano, God of Destruction. However the sorceress Seska is determined to seize power of her own, and a battle rages between the two.

Orion was a series pencilled and written by Walt Simonson, centered around Jack Kirby's Fourth World character, Orion. It was lettered by John Workman, and Bob Wiacek inked on occasion. Colors were provided by Tatjana Wood and Sherilyn Van Valkenburgh.