Question

in chiles atacama desert, the 8 meter gemini south telescope recently marked the 25th anniversary of the international gemini observatory with a public choice observation. local school classes were invited to vote on a shortlist of nebulae, while staff quietly checked that each candidate would be technically feasible. the winning target, the butterfly nebula, lies a few thousand light years away; the resulting deep image resolved delicate filaments of glowing gas streaming from a compact white dwarf star. because the exposure met strict professional standards for image depth, calibration, and pointing accuracy, observatory scientists argue that carefully curated public voting campaigns can expand community engagement without sacrificing the scientific usefulness of the data they collect.
12 □ mark for review
which finding from later evaluations, if true, would most directly support the scientists claim?
a follow up surveys show that students who participated in the target voting exercise report feeling more excited about astronomy and are more likely to visit science museums, but the study does not examine whether the resulting telescope images meet professional data quality standards.
b at a smaller observatory that allowed the general public to vote freely for any object in the sky without staff prescreening, nearly half of the winning targets turned out to be poorly placed, leading to low quality or unusable images and frequent schedule disruptions.
c internal scheduling records at gemini reveal that, during the anniversary campaign, staff slightly reduced exposure times on several faint galaxy programs to make room for additional butterfly nebula images requested for outreach materials, resulting in shallower than planned data for those science projects.
d a multi year audit comparing anniversary images chosen through schoolchild voting with a matched set of staff selected nebula observations finds that, after controlling for exposure time and sky conditions, both groups of images achieve indistinguishable signal to noise, calibration accuracy, and astrometric precision, and are cited at similar rates in peer reviewed research papers.

Explanation:

The scientists' claim is that carefully curated public voting campaigns can expand community engagement without sacrificing the scientific usefulness of the data. We need to find the option that directly supports this.

• Option A: Talks about students' excitement and museum visits, not about scientific usefulness of data. Irrelevant to the claim.
• Option B: Discusses a different (non - curated) public voting system with problems, but doesn't support the idea that a curated system works. It's more of a contrast case but not direct support.
• Option C: Shows that staff reduced exposure times for other projects for outreach, which might suggest sacrificing scientific data (since those projects got shallower data), so it weakens the claim.
• Option D: Compares images from schoolchild - voted (curated public voting) and staff - selected observations, and finds they have indistinguishable scientific quality (signal - to - noise, calibration, precision) and similar citation rates. This directly supports that the curated public voting didn't sacrifice scientific usefulness while engaging the community.

Answer:

D. A multi year audit comparing anniversary images chosen through schoolchild voting with a matched set of staff selected nebula observations finds that, after controlling for exposure time and sky conditions, both groups of images achieve indistinguishable signal to noise, calibration accuracy, and astrometric precision, and are cited at similar rates in peer reviewed research papers.