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🌍 APOAI 2026, Contest

Cosmic Probe: Star-Galaxy-Quasar Classification

Classify SDSS sources into star, galaxy or quasar from five-band magnitudes, scored with an F2 metric favouring quasar recall.

Statement
English
To hand in
A predictions file and the notebook that makes it
Hardware
A laptop is enough (CPU)
Data type
📊 Tables
Estimated difficulty
Unknown

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The foundations of the learning path for this kind of data.

›How to tackle it
  1. Read the statement. What to hand in, the metric that scores you, the time and hardware limits.
  2. Explore the data. Size, format, missing values, how the labels are spread.
  3. Score yourself first. Keep part of the training data aside to measure your work before submitting.
  4. Start simple, then improve. A first solution that works end to end, then one change at a time.
  5. Compare with a solution. Once you have searched, open it and see what you would have done differently.

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