IOAA 2020 : Dates, Registration, Questions, Results and Indian Team

IOAA 2020: The “International Olympiad On Astronomy And Astrophysics” (IOAA) is the final stage of the “National Standard Examination (NSE)”. In this examination, only those candidates can appear who clear the previous stages i.e. NSEA, INAO, OSC, PDT/ PDC.

Latest Update: IOAA 2020 will be Organized from Sunday 13th September 2020 – Tuesday, 22nd Sep 2020.

This time 14th IOAA Olympiad will be conducted at Bogota, Colombia. Candidates who will appear in this exam can get complete information regarding the IOAA 2020.

ioaa 2020

IOAA 2020 Dates and Host City (Expected)

Fri, Aug 2Whole dayArrival & registration
Sat, Aug 3MorningOpening Ceremony
AfternoonExcursionIBM1 Data analysis discussion
EveningFree timeData analysis translation
Sun, Aug 4MorningData analysis competitionIBM2 Night observation discussion
AfternoonFree time,
Studying the telescopes
IBM3 Theory discussion
EveningNight observation (first attempt)Night obser vation & Theory translation
Mon, Aug 5MorningExcursionExcursion
EveningFree time/ Night observation (second attempt)
Tue, Aug 6MorningTheory competitionIBM4 Day observation/planetarium
discussion and translation
AfternoonFree timeIBM5 Team competition
discussion and translation
EveningData analysis correction
Wed, Aug 7MorningDaytime observation / planetarium competitionExcursion
AfternoonTeam competition
EveningFarewell partyTheory & Night observation correction,
Farewell party
Thu, Aug 8MorningExcursionIBM6 Organisational discussion, final meeting
EveningDaytime observation /planetarium corrections,
Theory corrections
Fri, Aug 9MorningFree time by Lake BalatonModeration
AfternoonFree timeIBM7 Scoring & IBM8 Final meeting
EveningClosing ceremony
Sat, Aug 10Whole dayDeparture

Stages Required to Clear For Appearing in IOAA Exam

The IOAA exam is the final stage i.e. 5th Stage. To appear in this exam candidates need to clear the previous four stages i.e. Stage 1 (NSEA), Stage 2 (INAO), Stage 3 (Pre Departure Camp), Stage 4 (Orientation Cum Selection Camp), Stage 5 (International Olympiad).

What are the Participating Rules for Countries

The participating rules for the countries are given below:

  • Those students who will participate in the exam their age must be less than 20 years.
  • One team consisting of a total of 5 candidates only.
  • The International Board members are treated as contact persons for the participating countries in concern of the affairs of the International Olympiad on Astronomy and Astrophysics.
  • One team needs to be sent to the school by participating countries.
  • After the arrival of each team, the external head will hand over the organizers a list of contestants with their personal details such as DOB, first name, family name, home address and address of the school attended and certificates (in English) from the schools confirming their attendance and the year of competition.
Details Regarding Competition

The competition is divided into 2 parts i.e. theoretical and practical.

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Theoretical CompetitionPractical Competition
This consists of short and long questions i.e. 15 short questions and 2/3 long answerThe organizer may provide a set of the task which consists of:
  • Paper-based practical problem
  • Computer-based problem
  • Observation
  • Planetarium simulation or combination of the four which is required to be solved within the duration of 5 hrs.


Time Allotted: 5 hrs (for theoretical) and 5 hrs (for practical)

Duration: 10 days including arrival and departure days.

While solving the problems, candidates can use non-programmable pocket calculators which is brought by themselves.

Marking Scheme

The marking scheme of IOAA is as follows:

Name of The PartMarks
Theoretical Part50% of the total marks
Practical Part50% (25% data analysis and 25% observation) of the total marks

IOAA 2020 Syllabus

The syllabus of IOAA is given below under the table.

Name of The ChapterName of The Topics
Basic Astrophysics
Celestial Mechanics
  • Newton’s Law of Gravitation
  • Barycentre
  • Lagrange points
  • Roche limit
  • Kepler’s laws for circular and non-circular orbits
  • 2-body problem
  • Lagrange points
Electromagnetic Theory & Quantum Physics
  • Electromagnetic spectrum
  • Blackbody radiation
  • Radiation Laws
  • Thermodynamic equilibrium
  • Ideal gas
  • Energy transfer
Spectroscopy and Atomic Physics
  • Absorption
  • Emission
  • Scattering
  • Spectra of celestial objects
  • Doppler effect
  • Line formations
  • Continuum Spectra
  • Splitting and Broadening of spectral lines
  • Polarization
Nuclear Physics
  • Basic concepts including the structure of the atom
  • Mass defect and binding energy Radioactivity
  • Neutrinos (Q)
Coordinates and Times
Celestial Sphere
  • Spherical trigonometry
  • Equinox and solstice
  • Celestial coordinates and their applications
  • Constellation and Zodiac
  • Circumpolar stars
Concept of Time
  • Solar Time
  • Julian Date
  • Local Mean Time
  • Heliocentric Julian date
  • Sidereal time
  • Time zone
  • Universal time
  • Different definitions of “year”
  • Equation of time
Solar System
The Sun
  • Solar structure
  • Solar surface activities
  • Solar rotation
  • Sun-Earth relations
  • Solar radiation and solar constant
  • Solar wind and radiation pressure
  • Solar neutrions (Q)
  • Role of magnetic fields (Q)
  • Heliosphere
  • Magnetosphere
The solar system
  • Earth-Moon system
  • Retrograde motion
  • Structure and component of the Solar system (Q)
  • Outer reaches of the solar system (Q)
  • Formation and evolution of the solar system (Q)
  • Structure and orbits of the solar system objects
  • Precession
  • Libration
  • Nutation
  • Sidereal and synodic periods
  • Outer reaches of the solar system
Space Exploration
  • Satellite trajectories and transfers
  • Human exploration of the solar system (Q)
  • Planetary missions (Q)
  • Space-based instruments (Q)
  • Sling-shot effect of gravity
  • Tides
  • Eclipses
  • Seasons
  • Aurorae (Q)
  • Meteor Showers
Stellar Properties
  • Methods of Distance determination
  • Radiation
  • Cepheids & periods- luminosity relations
  • Determination of radii and masses
  • Luminosity and magnitude
  • Stellar motion
  • Physics of pulsation (Q)
  • Color indices and temperature
  • Irregular and regular stellar variability’s- broad classification & properties.
Stellar Interior and Atmosphere
  • Stellar atmospheres and atmospheric spectra
  • Stellar equilibrium
  • Boundary conditions
  • Stellar nucleosynthesis
  • Energy transportation
Stellar Evolution
  • Stellar formation
  • Hertzsprung- Russell diagram
  • Main sequence
  • Pre-Main sequence
  • Post-main sequence stars
  • Supernovae
  • End states of stars
Stellar Systems
Binary Star systems
  • Different types of binary stars
  • Doppler shifts in binary systems
  • interacting binaries
  • Light and radial velocity curves of eclipsing binary systems
  • peculiar binary systems
  • Mass determination in binary star systems
  • Techniques used to detect exoplanets
Star clusters
  • Classification and structure
  • Mass
  • Age
  • Luminosity and distance determination
Milky way galaxy
  • Composition and structure
  • Satellites of Milky way (Q)
  • Rotation
Interstellar Medium
  • Gas
  • Dust
  • Hill regions
  • Dispersion measure
  • Faraday rotation
  • Nebulae
  • 21cm radiation
  • Interstellar absorption
  • Classification based on structure
  • Composition and activity
  • Mass
  • Luminosity and distance determination
  • Rotation curves
Accretion Processes
  • Basic concepts (spherical and disc accretion) (Q)
  • Eddington luminosity
Elementary Cosmology
  • Cluster of galaxies
  • Dark matter
  • Distance measurement at
    cosmological scale
  • Cosmic
  • Expanding Universe and Hubble’s Law
  • cosmological redshift
  • Big Bang (Q)
  • Alternative models of the Universe (Q)
  • Gravitational lensing
  • Dark energy (Q)
  • Large scale structure (Q)
  • Microwave Background Radiation
Instrumentation and Space Technologies
Multi-wavelength Astronomy
  • Observation in radio
  • Microwave
  • Infrared
  • Visible
  • Earth’s atmospheric effects
  • Ultraviolet
  • X-ray and Gamma-ray wavelength bands
  • Telescopes and detectors
  • Aperture synthesis
  • Magnification
  • Photometry
  • Focal ratio
  • Resolving and light-gathering powers of telescopes
  • Geometric model of 2 elements interferometer
  • Focal length
  • Adaptive optics


 IOAA Previous Year Papers

We are providing here the previous year papers of IOAA. The previous year papers help the candidate to know the idea about the examination patterns and the idea of the question which come in the exam. The IOAA Question Paper is given below under the table.

Question PaperSolution
IOAA 2018

IOAA 2018 (Theory)

IOAA 2018 Data Analysis

IOAA 2017

IOAA 2017 (Theory)

IOAA 2017 (Data Analysis)

IOAA 2016 IOAA 2016 Solutions
IOAA 2020 Results

After the Olympiad the result of IOAA will be released on the official website. Candidates are able to check their IOAA examination result on the official site of IOAA or they can click on the link to check their result. The IOAA 2020 Results consists of the status of the candidate’s performance, Rank and also few more important details.

We provided here complete information regarding the IOAA. If you have any query, feel free to contact us through the comment box given below. We will reply to your queries as soon as possible.

IOAA: Official Site

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