WEBVTT

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Our destination lies in Cetus. This sky mosaic joins photographs from
Palomar's Schmidt telescope in California and the UK Schmidt telescope
in Australia.

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The surveys photographed different patches on separate nights, from
the nineteen seventies through nineties, usually about an hour per
exposure. Red and blue photographs provide the colors; green is
blended.

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The Moon, photographed by Galileo in nineteen ninety-two, is a
separate size reference.

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Next, Hawaii's Pan-STARRS One, combining visits from twenty-ten to
twenty-fourteen. Visible green light is displayed as blue, and near-
infrared light as red.

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Now Webb's Near Infrared Camera, using images taken in twenty twenty-
three. Cosmic expansion stretched the dot's ultraviolet and visible
light into infrared, beyond human vision.

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The three Webb filters measure infrared light. We display the shortest
wavelengths in blue, the middle band in green, and the longest in red.
The dot stands out in red because its longer-wavelength signal is
stronger.

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Its modeled brightness, across all wavelengths, is like a light on the
Moon emitting one watt in all directions.

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That model's glowing surface is about sixteen hundred astronomical
units across. At this distance, it would look as small as a three-
millimeter speck on the Moon.

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Webb detects the light. The proposed surface is far too small to
resolve.