• Educational Activities for Students

    The educational program for children at Thissio Visitor Center

  • Doridis Telescope

    Doridis Telescope

  • WMO certificate
  • ttod_photo01
  • August

    August 2017 | Photo: Theofanis Matsopoulos


    Julius Schmidt, CHARTE DES GEBIRGE DES MONDES, 1878, ΝΟΑ Library

  • simonvouet English2

    Simon Vouet (1590 - 1649), The Muses Urania and Calliope (1634)

    National Gallery of Art, USA

  • Τηλεσκόπιο Αρίσταρχος English

    Aristarchos Telescope, Helmos Observatory

  • Helmos National Geographic English

    Helmos Observatory, Photography: Harry Katzjaeger
    Source: "Top Shots," National Geographic, June 2012

  • Eskimo Nebula NGC2392 English

    Eskimo Nebula (NGC2392), Aristarchos Telescope, Observer: Dr. Ioannis Alikakos (NOA)

    Digital Image Processing: Theofanis Matsopoulos.

  • Μουσείο Γεωαστροφυσικής English

    Geoastrophysics Museum, Thissio

  • Εκπαίδευση στο ΕΑΑ English

    Summer School in Astrophysics

  • Τηλεπισκόπηση-Γή English

    Remote Sensing & Earth Observation

  • Greece from ISS English

    Greece from the International Space Station

    Photography: Paolo Nespoli, ESA astronaut

  • 3D Sun English

    3D Image of the Sun from the Solar Dynamics Observatory (SDO) mission of NASA.

    Source: NASA's Solar Dynamics Observatory

  • Helicorder English

    Analogue seismograph recorder

  • Geothermal English
  • Παλιρροιογραφος English

    Tide-gauge of the Instittute of Geodynamics at Vlyhada, Santorini.

  • Πειραμα Ulusses English
    Recovered  Ocean Bottom Seismometers on board of research vessel in the frame of the ULYSSES scientific program
  • Meteo historic archive english

    The historic archive of NOA/IERSD with recordings of climatic observations dated from the mid-19th century is one of the oldesr sources of climatic information for Eastern Medirranean.

  • Meteo time-series graph English

    The evolution of the average annual temperature in Athens from the mid-19th century until today, according to the records of the historic station NOA/IERSD (Hill Nymphs Thission).

  • Researchers Night 2014

    Pnyx Hill: Citizens observe the night sky through telescopes of NOA

    Researchers Night 2014

  • Researchers Night 2014

    Pnyx Hill: Citizens observe the night sky through telescopes of NOA

    Researchers Night 2014

Participation of NOA in the space mission GAIA (ESA)

dpac logo

The Gaia instruments will observe also other objects of the Milky Way, as asteroids and stars of nearby galaxies. Also it is expected to observe a million or more unresolved galaxies (as point sources) in the nearby Universe and hundreds of thousands of distant quasars. The mission will realize a series of tests of General Relativistic light bending by the Sun and major planets.

The National Observatory of Athens (NOA) actively participates in the mission since 2006. Two researchers of the Institute of Astronomy, Astrophysics, Space Applications and Remote Sensing, Dr. I. Bellas-Velidis and Dr. A. Dapergolas, along with researchers of the University of Athens, form the Greek team of Data Processing and Analysis Consortium (DPAC), an international consortium of about 400 scientists and engineers that is responsible for the processing and analysis of the mission’s data. The objective of the Greek team is the classification and parameterization of the unresolved galaxies. For this purpose, its members develop specialized software for automatic processing of galaxies spectra. The system is based on artificial intelligence algorithms and “education” with spectral templates. The group is also responsible for the creation and providing to other groups libraries of such templates. The libraries are based on synthetic spectra created applying evolutionary models of galaxies and on real observed spectra.

Currently there are carried out the necessary checks of the satellite systems and the instruments in-orbit commissioning is expected to be completed in May. The software developed by researchers of the Greek team will be fully operational by September 2014 for the first real application within the DPAC’s ground-based pipeline. The final database with the results of Gaia observations is expected to be completed after five cycles of processing and will be issued in 2022.


Gaia liftoff 6 625
Launch of the Gaia space mission with Soyuz rocket from European Space Centre in Kourou,
French Guiana on December 19, 2013.
  (Copyright: ESA - S. Corvaja, 2013)

Gaia calibration image node full image
One of the first test images from the Hubble Space Telescope Gaia. (Copyright: ESA)
Shown is the star cluster NGC1818 in nearby galaxy Large Magellanic Cloud.
The high resolution image can be found here

Animation of the Gaia launch to the operational orbit (Copyright: ESA)

Mon Tue Wed Thu Fri Sat Sun

Penteli Visitor Center
Thissio Visitor Center
Educational program on Meteorology
Multiple Events

Real Time Seismicity

Institute of Geodynamics
seismografoi thumb

Weather Forecast


View the latest weather forecasts, maps, and alerts for Greece on meteo.gr


The Sky Today


mainlogo ypourgiodiavgeia logoΓενική Γραμματεία Έρευνας & Τεχνολογίας - General Secretariat of Research & Technology