liquid Helium temperature (4 K) no relation telescope
The Spider instrument consists of six degree-resolution telescopes cooled to liquid Helium temperature (4 K) which observe at frequencies of 100 GHz, 150 GHz, and 280 GHz (corresponding to wavelengths of 3 mm, 2 mm, and 1.1 mm).  Each telescope is coupled to a polarisation-sensitive transition-edge bolometer (TES) array cooled to 300 mK.  Spider was the first instrument to successfully demonstrate time-domain multiplexed TES detectors in a space-like environment.  At the time of the first flight over Antarctica in 2015, Spider was the most sensitive microwave instrument ever made.The primary science goals include:
no relation