Halo

Astronomy and space science

• Galactic halo, an extended, roughly spherical component of a galaxy which extends beyond the main, visible component
• Halo orbit, a periodic, three-dimensional orbit
• Helium and Lead Observatory, a supernova neutrino detector

Mathematics

• Halo (mathematics), a concept in the theory of hyperreal numbers
• Monad (non-standard analysis), or halo, in non-standard analysis, the set of points infinitely close to a given point

Medicine and psychology

• Halo (medicine), a cervical brace
• Halo sign, a finding on ultrasound that suggests the diagnosis of temporal arteritis
• Health halo, a specialized Halo effect regarding food choices
• Halo effect, a type of cognitive bias

Optics

• Halo (optical phenomenon), an atmospheric light effect produced by ice crystals
• Halation, a problem in photography
• Heiligenschein an optical phenomenon giving a bright spot around a shadow, created when the surface on which the shadow falls has special optical characteristics

Other uses in science and technology

• Halo-, a prefix in chemistry indicating the names of compounds which contain one or more halogen atoms
• Halo antenna, a common omnidirectional antenna
• HALO jump, a High Altitude-Low Opening parachute fall
• Halo nucleus, of orbiting protons or neutrons
• Project Halo, an artificial intelligence project of Vulcan Inc.
• A vehicle wireless charging standard by Qualcomm
• Mil Mi-26, a helicopter (NATO reporting name "Halo")
• Halo, a certain type of automobile headlamp
• Halo (safety device), a component of open-wheel racing cars for protecting the driver's head

Fictional entities

• Halo, a fictional member of Wild Weasel's Phoenix Guard in G.I. Joe: America's Elite
• Halo (comics), a DC Comics superheroine
• Halo Jones, the heroine of the science fiction comic strip "The Ballad of Halo Jones" written by Alan Moore.
• Characters of Halo

Films

• Halo (1996 film), a 1996 Indian film
• Halo (2007 cancelled film), a never produced film adaptation of the Halo video game series
• Halo 4: Forward Unto Dawn (2012 film), a military science fiction action film set in the universe of the Halo franchise

Games

• Halo (series), a video game franchise by Bungie, 343 Industries, and Microsoft Game Studios
  • Halo: Combat Evolved, the first game in the series commonly referred to only as Halo
  • Halo (megastructure) is the center of the game's canon and from which it is named
  • Halo (board game), strategy games based on the Halo universe

Music

Other uses in arts and media

• Halo (artwork)
• Halo (b-boy move), a move used in the dance b-boying
• Halo Corporation, a fictional company appearing in Wildstorm comics
• Halo Meadows (1905–1985), American actress, writer and burlesque dancer