The International Olympiad on Astronomy and Astrophysics (IOAA) is an annual astrophysics
competition for high school students. Each national delegation is made
up of at most five student competitors plus two leaders, selected on a
national level.

__International Olympiad on Astronomy and Astrophysics : Preparation__- Syllabus of International Olympiad on Astronomy and Astrophysics.
- Useful Formulas for Astronomy and Astrophysics Olympiad
**Astronomy Olympiad Books**(Latest)

__Astronomy Textbooks__- "Fundamental Astronomy" by
- "Astronomy: Principles and Practice" by A.E Roy and D. Clarke
- "Astronomy: Structure of the Universe" by A.E Roy and D. Clarke
- "The Physical Universe" by Frank Shu
- "An Introduction to Modern Astrophysics" by Bradley W. Carrol and Dale A. Ostile
- "Astronomy: A Physical Perspective" by Marc L. Kutner
- "Schaum’s Outline of Astronomy" by Stacey Palen
- "Universe" by Roger A. Freedman and William J. Kaufmann III

**Physics****Textbooks**- "Fundamentals of Physics" by Robert Resnick, Jearl Walker, David Halliday
- "An Introduction to Mechanics" by Kleppner and Kolenkow
- "Physics" by John D. Cutnell, Kenneth W. Johnson

**Observational Textbooks and Software**- Stellarium
- Book of IAU Constellations
- Book of Messier Objects
- Sky and Telescope's Pocket Sky Atlas
- Telescope Mount

__Past Papers__- International Astronomy Olympiad Problems with Solutions (2011-2014)
- Russian Open School Astronomical Olympiad by Correspondence Problems with Solutions (2005-2008)
- Indian National Astronomy Olympiad Problems with Solutions (2008-2014)
- Srilankan Astronomy and Astrophysics Olympiad Problems with Solutions (2007-2011)
- Romanian Olympiad on Astronomy and Astrophysics Problems (2014)
- United States Astronomy and Astrophysics Olympiad Problems (2014)
- Bangladesh Astronomy Olympiad Problems
- "Astronomical Olympiad Problems" by V.G Surdin
- Proceedings of 3rd International Olympiad on Astronomy and Astrophysics
- Proceedings of 4th International Olympiad on Astronomy and Astrophysics

__Skills needed for Observational and Data Analysis Test__- How to search planets around
- About 40-50 constellations
- About 100-150 bright stars and their Bayer designation
- Positions of 40 easier "M" objects
- How to Measure Angle in the Sky
- How to Estimate Magnitude
- Exact Path of Ecliptic
- Errors and their Estimation
- Graph Plotting Techniques

__Special Video Lectures and Notes__- Spherical Astronomy
- Doppler Effect
- "Physics I: Classical Mechanics" by Prof. Walter Lewin
- "Introduction to Astronomy" by Prof. Ronen Plesser
- HyperPhysics
- Useful Astronomy Links