Introductory Astronomy for Teachers - Stellar and Galactic Astronomy Credit Hours: 3 hours. Designed to aid K-12 teachers with astronomical concepts concerning stars, galaxies, and the universe which arise in their teaching. The effective presentation of astronomical concepts in this area will be emphasized. Offered fall, spring and summer semester every year. Duplicate Credit: Not open to students with credit in ASTR 1020 or ASTR 1120 or ASTR 1120H Semester Offered: Fall Spring Summer Level: Graduate