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SDSS SkyServer Explorer

Query the Sloan Digital Sky Survey (DR18) — 4M+ spectra of stars, galaxies, and quasars. Supports custom SQL queries (CasJobs syntax), radial/cone search by sky coordinates, and sky image cutouts. Preset queries for bright galaxies, quasars (z>2), cool stars, AGN hosts, and white dwarfs.

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Overview

Data Source

SDSS SkyServer DR18 REST API (skyserver.sdss.org).

Endpoints

POST /sdss/query — Run SQL query

curl -X POST "https://atomgpt.org/sdss/query" \
  -H "Content-Type: application/json" \
  -d '{"preset": "galaxies_bright"}'

Or custom SQL:

curl -X POST "https://atomgpt.org/sdss/query" \
  -H "Content-Type: application/json" \
  -d '{"sql": "SELECT TOP 10 p.objID, p.ra, p.dec, s.z AS redshift FROM PhotoObj p JOIN SpecObj s ON s.bestobjid=p.objid WHERE s.class=\'GALAXY\'"}'

GET /sdss/query — API key auth

curl "https://atomgpt.org/sdss/query?preset=quasars&APIKEY=sk-XYZ"

POST /sdss/radial_search — Cone search

curl -X POST "https://atomgpt.org/sdss/radial_search" \
  -H "Content-Type: application/json" \
  -d '{"ra": 197.614, "dec": 18.438, "radius": 1.0, "limit": 50}'

GET /sdss/image_url — Sky image cutout URL

curl "https://atomgpt.org/sdss/image_url?ra=197.614&dec=18.438&scale=0.4&width=256&height=256"

Presets: galaxies_bright, quasars, stars_cool, supernovae_host, white_dwarfs.

AGAPI Agent

from agapi.agents import AGAPIAgent
import os
agent = AGAPIAgent(api_key=os.environ.get("AGAPI_KEY"))
response = agent.query_sync("Show sdss skyserver explorer data")
print(response)

References