# ASTR 420 Problem Set 03 Assessment Instructions

Inspect the student submission, this assignment, its solution key, submitted code/data, and the course policy.

## Standard
Award credit for correct equations, units, cosmological interpretation, uncertainty/sensitivity analysis, exact data provenance, and reproducibility. Separate arithmetic slips from conceptual errors and unsupported claims. Check that published level-2 values are not described as new measurements.

## Revision
Return feedback tied to a problem and rubric criterion. Permit one resubmission within one week with a change note; retain the same standards for evidence and reasoning.