Sonification of The Dreaded Clown-faced 'Emoji' Nebula: NGC 2392 | Hubble

Sonification of The Dreaded Clown-faced 'Emoji' Nebula: NGC 2392 | Hubble

This post is dedicated to all users of the notorious "clown-faced emoji" out there (and you know who you are). ;) In this sonification, the image is scanned clockwise like a radar. The radius is mapped to pitch, so light farther from the center is higher pitched. The outline of the nebula’s shell can be heard in the rising and falling of pitch, punctuated by its spokes. Brightness controls the volume. The Clown-faced Nebula (NGC 2392) or Caldwell 39, is a bipolar double-shell planetary nebula (PN). It was discovered by astronomer William Herschel in 1787. It is surrounded by gas that composed the outer layers of a Sun-like star. The visible inner filaments are ejected by a strong wind of particles from the central star. The outer disk contains unusual, light-year-long filaments.

NGC 2392 lies about 6,500 light-years away, and is visible with a small telescope in the constellation of Gemini.

At the center of NGC 2392, there is an O-type star with a spectral type of O(H)6f.

An emoji (絵文字 in Japanese) is a pictogram, logogram, ideogram, or smiley embedded in text and used in electronic messages and web pages. The primary function of modern emoji is to fill in emotional cues otherwise missing from typed conversation as well as to replace words as part of a logographic system. The first emoji sets were created by Japanese portable electronic device companies in the late 1980s and the 1990s. Emoji became increasingly popular worldwide in the 2010s after Unicode began encoding emoji into the Unicode Standard. They are now considered to be a large part of popular culture in the West and around the world.

Credit: NASA, European Space Agency (ESA), Andrew Fruchter (STScI), and the ERO team (STScI + ST-ECF)

Sonification credits: SYSTEM Sounds (M. Russo, A. Santaguida)

Duration: 36 seconds

Release Date: Nov. 5, 2021

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