Guided Tutorial

• GUIDE FOR USING JS9 Part 1
• GUIDE FOR USING JS9 Part 2
• Decoding Starlight
• 3 Color Composites
• X-ray Spectroscopy of Supernova Remnants
• Analysis of Two Pulsating X-ray sources
• Cartwheel Galaxy
• The Bullet Cluster
• False Color Images
• Adopt A Supernova
• Measuring the Expansion Rate of a Supernova Remnant



JS9 Solutions from Prior Events

• 2021 National Event
• 2020 MIT Invitational
• 2019 National Event
• 2018 National Event



Other Useful Images

• Bullet Cluster - optical lensing



SONT 2026

• Astronomy Packet A (Exam Booklet, Image Sheet, Answer Sheet)
• Astronomy Packet B (Answer Key, Statistics)