# SDO's Ultra-high Definition View of the 2012 Venus Transit (304 Angstrom, Full Disc)

NASA/SDO, AIA · 2012-06-05 22:42:39

Original title: SDO's Ultra-high Definition View of 2012 Venus Transit (304 Angstrom Full Disc 02) (the heading above is the museum's own, written by an AI model)

License: CC BY 2.0 (https://creativecommons.org/licenses/by/2.0) · Credit: NASA/SDO, AIA / Wikimedia Commons, CC BY 2.0 · Source: https://commons.wikimedia.org/wiki/File:SDO%27s_Ultra-high_Definition_View_of_2012_Venus_Transit_(304_Angstrom_Full_Disc_02).jpg

## What you would see

An enormous solar disc occupies almost the entire frame, centered against a completely black, empty background. Its edge is not a clean line: a faint, hair-like reddish halo surrounds it, with small wisps and protrusions escaping outward, especially at the upper left, the right side, and the lower right. The surface is intensely mottled, granular, and turbulent, as if made of embers, foam, and tangled fibers. Deep red and dark orange dominate, interrupted by patches of incandescent yellow and almost white gold. In the center-left, a large, very bright region twists into filaments and luminous knots; smaller bright areas glow toward the right and in the lower half. Darker veins and arcs snake among them, creating a sense of constant movement. In the upper right quadrant, contrasting with all that brilliance, appears a small, perfectly round, flat black circle: Venus in silhouette. It has no texture or halo and is strikingly tiny beside the disc. Tiny bright points, irregular cells, and fine spicules along the lower edge are noticeable only on slow inspection. There are no people, text, or scale references; the sensation is of overwhelming heat, energy, and immensity.

## How to look at it

Start with the whole disc and feel its scale before looking for anything else. Then find the tiny black circle in the upper right: that small point changes everything, because it turns a portrait of the Sun into an alignment of planets. Finally, move slowly across the mottled surface and compare the brilliant regions with the darker filaments.

## Context

According to the source, this image was taken by NASA's Solar Dynamics Observatory (SDO), with its AIA instrument, on June 5, 2012, during the transit of Venus across the Sun on June 5–6, 2012. The title identifies the view as the full disc at 304 angstroms, a wavelength outside visible light, so the reds and golds are a representation of that data. Such transits occur in pairs eight years apart, separated by 105 or 121 years: the previous one was in 2004 and the next will not occur until 2117.
(certainty: alta; written by an AI model, muse-wonder-1.0; trust the source)

## Curious detail

Although Venus is almost as large as Earth, it looks tiny here: the Sun's diameter is about 109 times Earth's, so even a planet appears as a small, perfectly round black dot against it.

## Questions

- What does the tiny size of Venus in this image make you think about our scale in the Solar System?
- How would the reading of the image change if the black dot were not identified as a planet?
- What is the effect of representing invisible light in fiery reds and golds we can see?

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

1. Find the perfectly round dark intruder in the image: in which quadrant of the Sun is that tiny black circle?
2. Not counting the black of space, which color dominates almost the entire solar disc, like deep embers and fire?
3. Look at the edge of the Sun: is its outline clean and smooth or fuzzy with tiny flames and protrusions?

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