# Dr. John Mather and the James Webb Space Telescope

GSFC · 2017-12-08

License: Dominio público (NASA) (https://www.nasa.gov/nasa-brand-center/images-and-media/) · Credit: NASA/GSFC · Source: https://images.nasa.gov/details/GSFC_20171208_Archive_e000351

## What you would see

In the foreground, a horizontal railing of light, grained wood crosses the lower part of the image and marks the boundary between the viewing area and the glass separating visitors from the clean room. Behind that glass, on the right and in the middle ground, an older man stands looking at the camera with a broad smile. He has short grey hair combed to one side and wears thin-framed glasses, a pale lilac long-sleeved buttoned shirt with a pen in the chest pocket, beige trousers and a dark belt. He holds a black phone with both hands at waist height; on his left wrist he wears a metal watch. To his left, behind the glass, the scene is dominated by an enormous tilted structure partly wrapped in bright yellow: segments of the telescope's primary mirror, held by a complex black frame with visible cables and mechanical parts. The scale of the apparatus dwarfs its surroundings and contrasts with the human figure. On the glass, English text and logos about the Webb 'Web-Cam' and its social media accounts can be read, along with a QR code. In the background there are walkways, yellow railings, an orange ladder, white walls and the even artificial light typical of a laboratory.

## How to look at it

First notice the contrast of scale between the man smiling on the right and the enormous golden structure on the left. Then look at the glass between them: the project texts and logos turn the scene into a visiting area. A small detail changes the reading: the phone in his hands makes this monumental technology feel everyday and close.

## Context

According to the NASA Image and Video Library, this photograph shows John Mather, project scientist for the James Webb Space Telescope (JWST), in front of its primary mirror at NASA's Goddard Space Flight Center in Greenbelt, Maryland, on May 4, 2016. The source record is dated December 8, 2017, probably as a catalogue or publication date. The JWST is a space observatory developed by NASA with international partners to observe the universe in infrared light. The golden structure visible behind the glass corresponds to part of that telescope during its construction and testing phase on Earth.
(certainty: alta; written by an AI model, muse-wonder-1.0; trust the source)

## Curious detail

The James Webb Space Telescope's primary mirror measures about 6.5 metres across and is made of 18 hexagonal segments coated with a very thin layer of gold, visible here in the yellow-gold structure behind the glass.

## Questions

- What does the presence of a smiling person in front of the glass change in our perception of such a complex scientific instrument?
- How does this image invite the public to follow, almost live, the construction of a telescope that will operate far from Earth?
- What other everyday objects or gestures could help communicate the scale and human labour behind a space mission?

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

1. What bright color is the wrapping that covers the segments of the primary mirror seen behind the glass?
2. What black object is the man holding with both hands at waist height?
3. What color is the staircase visible in the background of the clean room, next to the yellow railings?

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