• 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


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MPlionisManolis Plionis is the Director and President of the BoD of the National Observatory of Athens (since January 2017), a Professor at the Aristotelian University of Thessaloniki (Physics Department), a Visiting Scientist at the Institute of Astrophysics, Optics & Electronics (INAOE) of Mexico, Member of the Governing Board of the Science and Technology Museum of NOESIS since 2015 and member of the Greek National Committee for Astronomy.

He was born in Athens in 1960 and received a Mathematics degree from the University of Crete and a PhD in Observational Cosmology in 1989 from the University of Sussex (UK), supervised by Professor John Barrow.

He was a postdoctoral researcher at the SISSA International Research Center in Italy for about 5 years (out of which 2 as a E.C. Fellow under the Human Capital and Mobility program) and at the ICTP International Center of Theoretical Physics for 1 year. He returned to Greece in 1995 as a Researcher at the National Observatory of Athens where he stayed until 2012. He was elected Professor at the Physics Department of the Aristotle University of Thessaloniki in 2009 and took up his position in 2012.

He has published over 200 publications (h-index 34 according to NASA's ADS system) and many popular science articles, while he has supervised many Doctoral and Master theses. He was a founding member and elected member of the Governing Board of the Hellenic Astronomical Society (for 3 terms) and Vice-Chairman of the Board for a further term. He was also a founding member and an elected member of the Governing Board for one term of the "Hellenic Society for Gravity, Relativity and Cosmology".

His research interests are related to Observational and Numerical Cosmology, Large-Scale Structure of the Universe and Extragalactic Astrophysics.

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

Real Time Seismicity

Institute of Geodynamics
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Weather Forecast


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The Sky Today


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