Ethan Chen Astronomy Homepage


Celestial Object/Event Count
Binary/Multiple Star Systems75
Open Star Clusters10
Globular Star Clusters1
Nebulae8
Galaxies8
Northern Lights/Aurora Borealis2
Lunar Eclipses2
Solar Eclipses1
Asteroids1
Comets1

Most Recent Photograph

Messier 42 Orion Nebula/Messier 43 De Mairan's Nebula" | 3/27/2026

(NGC 869, Betelgeuse, Jupiter photographed on same day)

Orion Nebula

Telescopes Used

Celestron 5" Reflector
Michigan

5 Inch Celestron

Planewave 20" Reflector "Apollo"
Summer Science Program 2024 - CU Boulder - Team 5

20 Inch Planewave

Unistellar 4.5" eVscope
University of Michigan Student Astronomical Society

20 Inch Planewave

Changelog

3/27/2026:
- Added Orion Nebula, NGC 869, Betelgeuse, Jupiter

2/17/2026:
- Added UMSO Astronomy C Materials

2/5/2026:
- Added Python, MATLAB and Desmos Variant of Eclipsing Binary Simulator

2/4/2026:
- Added PurdueSO 2025-2026 Solar System B Materials

12/22/2025:
- Added Hawk and Hornet 2025-2026 Astronomy C Materials

12/19/2025:
- Added Northview 2022-2023 Fermi Questions C, Hawk and Hornet 2023-2024 Astronomy C, Eagle Invitational 2024-2025 RFTS Materials

12/7/2025:
- Added MasonSO 2025-2026 Astronomy C, Experimental Design C Materials

10/4/2025:
- Added Ring Nebula, Firework Galaxy, Andromeda Galaxy to DSO gallery

9/18/2025:
- Added Saturn photos to general gallery

9/15/2025:
- Added 70 Ophiuchi to Binary Star Gallery

8/16/2025:
- Added Izar (Epsilon Bootis) to Binary Star Gallery
- Split DSO Gallery into three sections (Nebulae, Galaxies, Clusters)
- Added recent photograph section

8/12/2025:
- Updated Eta Cassiopeiae photo
- Added Favicon (website tab icon)

8/3/2025:
- Website launch