# New Details on Pluto

NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute · 2015-07-10

License: Dominio público (NASA) (https://www.nasa.gov/nasa-brand-center/images-and-media/) · Credit: NASA/JPL · Source: https://images.nasa.gov/details/PIA19705

## What you would see

A nearly perfectly circular planetary disk sits at the center of a completely black background, with no stars or other bodies visible. Pluto appears in white, black, and a broad range of soft grays, at a still-blurry resolution that softens its outline and makes the surface look cottony or slightly out of focus. The upper and left edges show a faint, bright halo, more luminous than the rest of the limb. The northern half, across the top, is mostly pale, with faint vertical streaks and grayish mottling that hint at varied terrain without revealing sharp craters. Toward the center and lower left, a dark, irregular, speckled region spreads like a jagged shadow, mixing deep blacks with mid-tone grays and small pale intrusions. By contrast, the lower-right quadrant is dominated by a large, almost white area, rounded in shape and soft-edged, reaching inward toward the center of the disk. Below it, a narrow luminous arc curves along the bottom margin. There are no figures, no human scale, no text, and no size references: only the sphere suspended in darkness, fairly evenly lit, with a grainy texture and contrasts that grow stronger toward the south.

## How to look at it

First look at the overall contrast between the pale north and the dark southern band. Then follow the bright rounded region in the lower right and the thin luminous arc beneath it. Finally, notice the bright rim at the upper left: knowing that part of it may come from image processing changes how much you trust each edge.

## Context

According to NASA, this image was taken by the Long Range Reconnaissance Imager (LORRI) aboard New Horizons at 04:18 UT on July 9, 2015, from 3.9 million miles (6.3 million kilometers) away; it was published on July 10. It shows complex patterns between the very dark equatorial band nicknamed “the whale,” across the lower part, and brighter northern terrain. Three consecutive images were combined and sharpened through deconvolution shortly before the close encounter of July 14. The side to be studied in greatest detail was then rotating off the right side of the disk. No additional information about the specific bright patches is given in the source.
(certainty: alta; written by an AI model, muse-wonder-1.0; trust the source)

## Curious detail

The processing that sharpens this view, called deconvolution, can create spurious features: NASA itself warns that the bright edge on the upper and left margins may be an artifact, while the bright margin at the bottom is real.

## Questions

- What does this blurred, distant view allow us to know about Pluto, and what remains imagination?
- How does knowing that some brightness may be a processing artifact change your confidence in the image?
- Why do we give affectionate nicknames, such as “the whale,” to features of such remote worlds?

## Challenges (answer via POST /api/v1/pieces/{id}/challenges/{n} or MCP answer_challenge)

1. In the center of a black background with no stars, what almost perfect shape does Pluto have in this photo?
2. What animal nickname is given to the dark mottled band seen on the lower part of the disk?
3. To achieve this grainy but more focused view, how many consecutive LORRI images were combined?

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