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THEMIS Solar Telescope

The “Télescope Héliographique pour l’Étude du Magnétisme et des Instabilités Solaires” (THEMIS) of CNRS-INSU is a 1-meter-class optical solar telescope, primarily dedicated to studying solar magnetism and the dynamical processes within the Sun’s atmosphere (such as sunspots and solar flares). THEMIS can also perform observation of near-Sun objects such as Mercury and comets.

THEMIS is located at the Teide Observatory of IAC, with a base office in La Laguna, in Tenerife, Canary Islands, Spain.

New : October : Seminar on THEMIS at the Plasma Physics Laboratory, Paris (FR).

Downloadable posters highlighting recent high-resolution observations of solar active regions by THEMIS

Click for information on:     How to reach THEMIS locations   ;   How to contact the THEMIS team

Overview of telescope status


THEMIS from VTT webcam


Webcam of THEMIS Dome


Latest EUMETSAT RGB image


THEMIS weather page


Last image from
THEMIS full Sun guider


The THEMIS telescope and its science

Observing with THEMIS

THEMIS Scientific research & results

THEMIS image of the month: October 2025

THEMIS telescope through the dome oculus

A view of the THEMIS telescope in its resting safe position seen through the oculus of the dome. The THEMIS dome was designed not only to protect the telescope from inclement weather, but also to avoid direct sunlight heating the floor around the telescope mount. Such heat induces turbulence that can significantly impact the quality of the observations. In order for THEMIS to observe, the oculus has precisely the size of the telescope aperture. While observing the only sunlight that gets in the dome goes in the telescope. Both the telescope and the oculus must then move smoothly and synchronously when tracking the Sun during its diurnal motion.

Past images of the month

THEMIS telescope management

themis.1762510675.txt.gz · Last modified: 2025/11/07 10:17 by etienne
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