A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730...

Look up light year in Wiktionary, the free dictionary. A light-year is the distance that light travels through a vacuum in one year. Light year(s) and...

Year of No Light is a French post-metal band formed in Bordeaux in 2001. On their 2006 debut album Nord, the band combined a dark and aggressive sludge...

foot) to the light-minute, light-hour and light-day, which are sometimes used in popular science publications. The more commonly used light-year is also currently...

unintuitive. By convention, the Julian year is used in the computation of the distance covered by a light-year. In the Unified Code for Units of Measure...

The International Year of Light and Light-based Technologies 2015 or International Year of Light 2015 (IYL 2015) was a United Nations observance that aimed...

lights to give children the ability to make him fly and a blinking red light bulb on his wrist to act as a laser. A button was included on his chest...

The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately...

"The Hundred Light-Year Diary" is a science-fiction short story by Australian writer Greg Egan, first published in Interzone 55 in January 1992. It was...

/ Year of No Light is a split EP between the French heavy metal bands Karysun and Year of No Light. Side A: Karysun "Salvation" – 4:33 Side B: Year of...

Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. Visible light spans the visible spectrum...

second single on 22 November 2019. Stevens' fourth studio album, titled Light Year, was released on 30 April 2021. Its lead single, "Jump In", was released...

are only about half a light-year across and weigh in at about two solar masses their size varies: a globule one quarter light year in radius has 5.5×1046 m3...

A Small Light is a biographical war drama miniseries created by Joan Rater and Tony Phelan. It premiered on National Geographic on May 1, 2023. The miniseries...

distance, defined by "reversing the procedure" used in defining a light-year. A light-foot is roughly one nanosecond. In nuclear engineering and astrophysics...

Nord is the debut full-length album by French post-metal band Year of No Light, released in 2006. It was originally released by Radar Swarm (CD), E-Vinyl...

small to be convenient for interstellar distances, where the parsec and light-year are widely used. The parsec (parallax arcsecond) is defined in terms of...

AU (1.18, 2, and 3 light-years, respectively)) 9.5 Pm – 63,241.1 AU – One light-year, the distance traveled by light in one year 9.9 Pm – 66,000 AU –...

Faster-than-light (superluminal or supercausal) travel and communication are the conjectural propagation of matter or information faster than the speed of light (c)...

increasing major axis diameters. The unit of measurement used is the light-year (approximately 9.46×1012 kilometers). Galaxies are vast collections of...

sidereal year and the tropical year to about ±0.008 days. The Julian year is the basis of the definition of the light-year as a unit of measurement of distance...

to 149597870691±30 m. A light-year is equal to 9.4607304725808×1012 km the distance light travels through vacuum in one year (365.25 days). Develey, Emmanuel...

mass of about 2 to 50 solar masses contained within a region about a light year or so across (about 4.5×1047 m3). They contain molecular hydrogen (H2)...

discovered. The unit of measurement used is the light-year (distance traveled by light in one Julian year; approximately 9.46 trillion kilometres). This...

twice that of the Sun and it measures about half a light-year across. Despite being opaque at visible-light wavelengths, use of the Very Large Telescope at...

extension of the GNU LilyPond sheet music format Light-year, the distance that light travels in one year in a vacuum Langley (unit), a unit of energy distribution...

geological and historical events that define them individually. Note: The light-year is not a unit of time, but a unit of length of about 9.5 petametres (9 454 254 955 488...

"Waited a Light Year" instead; the label issued the single to radio stations on June 22, 1998. The decision to release "Waited a Light Year" as a single...

A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron...

of the rotation of a disk of molecular gas orbiting within the inner light-year around the black hole. NGC 4217 is a possible companion galaxy of Messier...