References - Black Holes. The Mystery.

📚 Reference List

The following sources were consulted for content, design inspiration, multimedia resources and code support. All references follow Harvard citation style.
Each source is numbered and categorized by type for easy reference.

1 Website — Government Agency

Black Holes

National Aeronautics and Space Administration (NASA) 2025, NASA, viewed 28 May 2025.

science.nasa.gov/universe/black-holes/

2 Website — Space Agency

Black Holes and Galaxy Evolution

European Space Agency (ESA) 2025, ESA, viewed 28 May 2025.

www.esa.int

3 Website — Research Collaboration

Imaging Black Holes

Event Horizon Telescope Collaboration 2024, viewed 28 May 2025.

eventhorizontelescope.org

4 Website — Documentation

HTML and CSS Documentation

Mozilla Developer Network (MDN) 2025, viewed 28 May 2025.

developer.mozilla.org

5 Website — Educational Resource

HTML Tables, Forms and CSS Tutorials

W3Schools 2025, viewed 28 May 2025.

www.w3schools.com

6 Guide — University Publication

Harvard Referencing Guide

University of Canberra Library 2026, University of Canberra, viewed 28 May 2025.

7 Tool — AI Assistance

ChatGPT Assistance for Code Debugging and Content Planning

OpenAI 2026, AI support tool used in website development.

🔧 Outsourced Resources

NASA imagery adapted for educational inspiration
HTML/CSS references from MDN and W3Schools
YouTube/NASA visual references for simulation concepts
W3C HTML and CSS validation tools
AI-assisted debugging and structure planning support

✅ Validation Resources

W3C HTML Validator — markup validation
W3C CSS Validator — stylesheet validation
Browser Developer Tools for testing and debugging