Massive space telescope achieves significant construction phase
European Giant Telescope (EGT) Reaches Milestone with Completion of Dome's Steel Skeleton
The European Southern Observatory (ESO) has announced that the European Giant Telescope (EGT), also known as the Extremely Large Telescope (ELT), has reached a significant milestone with the completion of its dome's steel skeleton. The dome structure, measuring 80 meters high and 88 meters wide, is now complete and equipped with dark blue panels that include thermal insulation and an aluminium outer sheet to protect the telescope from the harsh conditions of the Atacama Desert.
The EGT, designed to be the world's largest telescope dedicated to observing visible and infrared light, is expected to be operational by 2028. The telescope will be located at Cerro Armazones in the Atacama Desert, Chile.
The EGT's unique features include a massive segmented primary mirror of 39.3 meters in diameter and a 4.25-meter diameter secondary mirror for unprecedented light-collecting power. Advanced adaptive optics, a seismic and vibration isolation system, and a high-precision mount ensure stability and precise tracking.
One of the key advantages of the EGT is its ability to study the confines of the visible universe, detect exoplanets, and study Earth-like galaxies with unprecedented detail. The telescope will enable direct imaging and characterization of exoplanets, investigate the formation and evolution of stars and galaxies, study the early universe, provide detailed surface and atmospheric analysis of exoplanets, and contribute to cosmology by precise measurements of dark matter and dark energy effects.
The EGT's dome features a large observation slit that opens at night and closes during the day to minimize turbulence. A climate control system inside the dome keeps the air at the same temperature as outside, ensuring optimal conditions for observations. The central concrete foundation, called the azimuthal structure, is essential for the stability of the EGT.
An image shared by ESO on April 3 shows the progress of the work inside the EGT's dome, with the Milky Way in the background. The EGT represents a major leap forward in optical/infrared ground-based astronomy and will drastically improve our capability to explore faint, distant, and small-scale cosmic phenomena with unprecedented clarity and sensitivity. The EGT is an ambitious endeavor aimed at revolutionizing astronomy.
[1] European Southern Observatory. (2021). The European Extremely Large Telescope (E-ELT). Retrieved from https://www.eso.org/public/teles-instr/eelt/
[4] European Southern Observatory. (2021). Cerro Armazones. Retrieved from https://www.eso.org/public/teles-instr/eelt/location/cerro-armazones/
[5] European Southern Observatory. (2021). Science with the European Extremely Large Telescope (E-ELT). Retrieved from https://www.eso.org/public/teles-instr/eelt/science/
Science and technology are seamlessly intertwined in the construction and operation of the European Giant Telescope (EGT), also known as the Extremely Large Telescope (ELT). As space-and-astronomy research continues to advance, the EGT, designed to be the world's largest telescope dedicated to observing visible and infrared light, will play a pivotal role in uncovering the mysteries of the universe with its unprecedented capabilities.
