What did the Sloan Digital Sky Survey (SDSS) do?

Question

BlackTom AI · Accepted Answer

The question asks about the Sloan Digital Sky Survey (SDSS) and what it did.
Since the provided options are not listed in the answer options field, I’ll focus on the information given in the answer data: the stated correct answer is that SDSS collected images and spectra of millions of galaxies to map the 3D structure of the universe.
This description aligns with the core goal of the SDSS: to create a large, detailed map of the cosmos. It achieved this by taking wide-field, deep images of large swaths of the sky and obtaining spectra for many objects. The images allowed precise measurements of positions, colors, and morphologies, while spectra provided redshifts, enabling three-dimensional placement of galaxies and other objects. Together, these data enable astronomers to infer the large-scale distribution of matter, study cosmic structures, and trace the growth of galaxies over time.
An explanation of why this answer is correct: collecting both imaging and spectroscopic data for a vast number of galaxies directly constructs a 3D map of the universe, which is the fundamental purpose of SDSS surveys.
If there were alternative options, we would assess them on these criteria: (1) whether they describe data collection at wide sky coverage, (2) whether they involve spectra in addition to images, and (3) whether they explicitly mention constructing a 3D map or redshift-based structure. In this case, the provided correct statement uniquely matches the SDSS mission as widely described in astronomical literature.
Note on the dataset gap: the answer_options field is empty, so there are no other choices to compare here. In a typical multiple-choice item, we would contrast each distractor against the described SDSS purpose and explain why it does or does not fit.

SPACE TIME AND THE UNIVERSE ASTR 1600-02 (91240) Week 8 Quiz

What did the Sloan Digital Sky Survey (SDSS) do?

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