28.11.2026

Slopfest #4 · 1930 · Vienna

The Ninth Planet (Pending)

A new planet was found. We booked it as a special guest before anyone checked.

Art Deco lithograph poster: a smiling Pluto in a top hat above the Karl-Marx-Hof arches, 'SLOPFEST #4, NOW WITH NINE PLANETS'
Art Deco lithograph poster: a smiling Pluto in a top hat above the Karl-Marx-Hof arches, 'SLOPFEST #4, NOW WITH NINE PLANETS'

Museum status: Listed as "priceless" (nobody would name a price).

Venue
Karl-Marx-Hof, the courtyard, newly finished
Attendance
31
Guest of honour
Arnold Schoenberg (wrote a piece for nine planets that nobody could hum)
Fun fact
9 planets, a record that stood for 76 years

What happened

The committee added Pluto to the lineup and printed 'Now With Nine Planets' on every poster. Arnold Schoenberg, passing through, wrote a short piece for nine planets and one festival that nobody could hum. Guests got telescopes pointed at the Kahlenberg. Hermine's minutes list Pluto's attendance as 'confirmed', a status it held until 2006.

Elsewhere in 1930

Clyde Tombaugh discovers Pluto at Lowell Observatory in Arizona. It is announced as the solar system's ninth planet.

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