Home2026-04-24T16:50:31+03:00

ARISTARCHOS Telescope

A 2.3 m telescope in the Peloponnese, Greece

A Unique Infrastructure

Helmos Observatory is located on mount Helmos (Aroania) in the Northern Peloponnese at an altitude of 2340 m (22˚ 11′ 46″ East, 37˚ 59′ 04″ North), 130 km west of Athens and about 15 km from the city of Kalavryta. The site is one of the darkest areas in Greece and Europe.

  • ARISTARCHOS – A 2.3m instrument in the Peloponnese operated by IAASARS

  • Quality – Excellent quality of optics

  • International Collaborations – Partner of ESA/ScyLight,OPTICON-RadioNet Pilot

Φωτογραφία του Τηλεσκοπίου Αρίσταρχος από το εσωτερικό του Θόλου
Observing Schedule

Observing Schedule

We would like to inform the Astronomical community that during the period July – October 2025 the “Aristarchos” telescope will not operate, due to technical works related to its upgrading. The ESA-funded modernization of Aristarchus will significantly increase the telescope’s capabilities for high-quality astronomical observations.

At a Glance

HOTSPOT Project

In the framework of ScyLight

ScyLight Project

ScyLight Project

The first ScyLight pilot station | Helmos Observatory

OPTICON-RadioNet Pilot

OPTICON-RadioNet Pilot

ARISTARCHOS is a member of the network

News

Telescopes on Helmos and in Kryoneri in the Peloponnese communicate with NASA’s Psyche mission at a distance of 265 million kilometers

26/07/2025|

In a rare space-related achievement for Greece, telescopes of the National Observatory of Athens in the Peloponnese are being deployed this summer in an interplanetary laser optical communication experiment, a technology being tested for the first time on European soil, paving the way for the era of the so-called space Internet.

ERMIS Project Press Release

23/06/2023|

The Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS) of the National Observatory of Athens actively participates as one of the main pillars in the Hellenic network for the ERMIS Hellenic Cubesat Demonstration Mission that aims to certify new, innovative space technologies and applications, such as 5G communications for the Internet of Things (IoT), satellite telecommunications and a multispectral camera for earth observation.

Latest Publications

The selection of the Helmos Observatory by ESA as the first ground station for “fiber in the sky” is crucial in order for our country to play a central role in the new generation applications for the space sector.

This successful collaboration of the National Observatory of Athens with ESA and the Ministry of Digital Governance opened the possibility for other national infrastructure to be included in the program.”

DR SPYROS BASILAKOS, Director of NOA & President of the Board of Directors

Our Partners

Discover The Universe

Meet Our Team

Manolis Xilouris
Manolis XilourisDirector of IAASARS
Panayotis Boumis
Panayotis BoumisHead of the Helmos Observatory
Research Director at the IAASARS
Stavros AkrasDeputy Head of the Helmos Observatory
Senior Researcher at the IAASARS
Athanassios Maroussis
Athanassios MaroussisEngineering support
Dr. Maroussis has participated in a large number of research projects, European and national, in the wider field of telecommunications.
John Alikakos
John AlikakosSupport Astronomer & Telescope Οperator
Dr. Alikako’s research focuses on Multi-Wavelength studies of Supernova Remnants (SNRs) and the interaction with the Interstellar medium.
Alexis Gourzelas
Alexis GourzelasTechnical Support & Telescope Operator
Mr. Gourzela’s tasks include telescope and local network maintenance, as well as electrical and automation equipment maintenance.
Go to Top