Astrophysics (Index)About

Colossus Telescope

(The Colossus Telescope)
(concept for a 50-meter telescope using interferometry)

The Colossus Telescope (cited with The, i.e., "The Colossus Telescope") is a concept for a future telescope larger than the European Extremely Large Telescope (E-ELT). The concept features an effective primary mirror aperture of 50 meters using 60 individual 8-meter mirrors. (Being at the concept stage, somewhat different numbers have been cited.) It differs from segmented-mirror designs in that each 8-meter mirror would have a dedicated 18-mm secondary mirror and optical interferometry would be used to produce the output image, though each primary mirror would be off-axis, aiming light at a tightly-packed group of secondaries. Due to gaps between the individual mirrors, and an overall hexagonal shape, the collecting area would be about 70% of that of a single 50-meter mirror.

The PLANETS telescope (for Polarized Light from Atmospheres of Nearby Extraterrestrial Systems) is a 1.85-meter telescope in development for Haleakala Observatory, Maui, Hawaii, which is to double as a pilot for some of Colossus's technology. The ExoLife Finder (ELF) is a proposed telescope, essentially a scaled-down version of the Colossus, with sixteen 5 meter primary mirrors and a 25-meter diameter (with the potential for high angular resolution but limited collecting area). I'm guessing this scaled-down version still did not attract enough interest to make much progress.


(telescope,ELT,visible light,concept,ground)
Further reading:
https://en.wikipedia.org/wiki/PLANETS_telescope
https://en.wikipedia.org/wiki/ExoLife_Finder
https://www.planets.life/
https://ui.adsabs.harvard.edu/abs/2014SPIE.9145E..1GK/abstract
https://ui.adsabs.harvard.edu/abs/2014SPIE.9145E..1LM/abstract
https://www.researchgate.net/figure/The-Colossus-telescope-optical-interferometric-configuration-optimized-for-the_fig2_266735566
https://www.facebook.com/The-Colossus-Telescope-106078816258737/
https://www.centauri-dreams.org/2017/05/15/planets-telescope-building-toward-colossus/
https://www.engineering.com/story/planets-foundation-is-building-new-telescope

Referenced by pages:
extremely large telescope (ELT)
Haleakala Observatory

Index