Which composer's piece 'Atmospheres' is used in the stargate sequence of 2001?

Which composer’s piece “Atmosphères” is used in the stargate sequence of 2001? The piece was composed by György Ligeti. Kubrick used Ligeti’s eerie orchestral music to give the film’s cosmic imagery an uncanny, otherworldly sound.

Ligeti composed Atmosphères in 1961 for large orchestra. Instead of presenting a conventional melody or steady metre, the work builds slowly shifting masses of sound. Its dense texture comes from micropolyphony, a technique in which many closely interwoven musical lines blur into a single evolving sonority.

In 2001: A Space Odyssey, Atmosphères is heard as Dave Bowman enters the stargate, during the film’s “Jupiter and Beyond the Infinite” sequence. Kubrick also used portions of it in the overture and intermission in some presentations. The film additionally features Ligeti’s Requiem, Lux Aeterna, and an altered excerpt from Aventures.

Richard Strauss is a frequent wrong answer because his “Also sprach Zarathustra” provides the film’s famous opening fanfare. Johann Strauss II is another mix-up: his “The Blue Danube” accompanies the graceful docking sequence. Those pieces are prominent, but the stargate’s sound world belongs to Ligeti.