Question: Which documentary provides a more in depth look at a specific moment in time, That's Dancing! or The Reflektor Tapes?
Context: In standard cosmology, comoving distance and proper distance are two closely related distance measures used by cosmologists to define distances between objects.  "Proper distance" roughly corresponds to where a distant object would be at a specific moment of cosmological time, which can change over time due to the expansion of the universe.  "Comoving distance" factors out the expansion of the universe, giving a distance that does not change in time due to the expansion of space (though this may change due to other, local factors, such as the motion of a galaxy within a cluster).  Comoving distance and proper distance are defined to be equal at the present time; therefore, the ratio of proper distance to comoving distance now is 1.  At other times, the scale factor differs from 1.  The Universe's expansion results in the proper distance changing, while the comoving distance is unchanged by this expansion because it is the proper distance divided by that scale factor. Warren Ellis: Captured Ghosts is a feature-length documentary that takes an in depth look at the life, career and mind of the British comic book writer Warren Ellis.  The film combines extensive interviews with Ellis with insights from his colleagues and friends, as well as ambient visual re-creations of his prose and comics work. In demonology, Orias (also spelled Oriax) is a Great Marquis of Hell, and has thirty legions of demons under his command.  He knows and teaches the virtues of the stars and the mansions of the planets (the influence of each planet depending on the astrological sign in which it is in a specific moment and the influence of that sign on an individual depending on how the zodiac was configured at the moment of his/her birth or at the moment of asking a question to the astrologist); he also gives dignities, prelacies, and the favour of friends and foes, and can metamorphose a man into any shape. The Piano Lesson depicts the living room of Henri Matisse' s home in Issy-les-Moulineaux, with his elder son, Pierre, at the piano, the artist's sculpture "Decorative Figure" (1908), at bottom left, and, at upper right, his painting "Woman on a High Stool".  Matisse began with a naturalistic drawing, but he eliminated detail as he worked, scraping down areas and rebuilding them broad fields of color.  The painting evokes a specific moment in time—light suddenly turned on in a darkening interior—by the triangle of shadow on the boy's face and the rhyming green triangle of light falling on the garden.  The artist's incising on the window frame and stippling on the left side produce a pitted quality that suggests the eroding effects of light or time, a theme reiterated by the presence of the metronome and burning candle on the piano. That's Dancing!  is a 1985 retrospective documentary film produced by Metro-Goldwyn-Mayer that looked back at the history of dancing in film.  Unlike the "That's Entertainment! " series, this film not only focus specifically on MGM films, but also focus specifically on United Artists films and the Associated Artists Productions library and included more recent performances by the likes of John Travolta (from "Saturday Night Fever") and Michael Jackson and from the then-popular films "Fame" (1980) and "Flashdance" (1983), as well as classic films from other studios, including "Carousel", released by 20th Century Fox, and "Oklahoma! ", released by Magna Corporation (roadshow) and RKO Radio Pictures (general release). Cardioversion is a medical procedure by which an abnormally fast heart rate (tachycardia) or other cardiac arrhythmia is converted to a normal rhythm using electricity or drugs.  Synchronized electrical cardioversion uses a therapeutic dose of electric current to the heart at a specific moment in the cardiac cycle, restoring the activity of the electrical conduction system of the heart.  (Defibrillation uses a therapeutic dose of electric current to the heart at a random moment in the cardiac cycle, and is the most effective resuscitation measure for cardiac arrest associated with ventricular fibrillation and pulseless ventricular tachycardia.)  Pharmacologic cardioversion, also called chemical cardioversion, uses antiarrhythmia medication instead of an electrical shock. Horoscopic astrology is a form of astrology that uses a horoscope, a visual representation of the heavens, for a specific moment in time in order to interpret the inherent meaning underlying the alignment of the planets at that moment.  The idea is that the placement of the planets at any given moment in time reflects the nature of that moment and especially anything that is born then, and this can be analyzed using the chart and a variety of rules for interpreting the 'language' or symbols therein. The Reflektor Tapes is a 2015 British documentary film directed by Kahlil Joseph about the making of the album "Reflektor" by the Canadian band Arcade Fire.  It was shown in the TIFF Docs section of the 2015 Toronto International Film Festival. DonTrell Jamar Moore (born September 25, 1982) is a former American football running back who last played for the New Mexico Stars of the Indoor Football League (IFL).  An undrafted free agent in the 2006 NFL Draft, Moore eventually signed with the New York Jets in 2006.  Moore played college football at the University of New Mexico.  Moore was featured in the documentary "Two Days in April", an in depth look into player preparation for the NFL draft.  Before his successful college career, Moore went to Roswell High School, where he was coached by Coach Jack Cisco and won the state championship in 2000. Grant Morrison: Talking with Gods is a feature-length documentary that takes an in depth look at the life, career and mind of the Scottish comic book writer Grant Morrison.  "Talking with Gods" features interviews with Morrison and many of his collaborators, such as artists, editors and other industry professionals.
Answer: The Reflektor Tapes