"The Webb team has analyzed its initial trajectory and determined the observatory should have enough propellant to allow support of science operations in orbit for significantly more than a 10-year science lifetime," NASA officials wrote in a statement posted Wednesday (Dec. 29)."
@@雅桑了嗎 有没搞错啊!!你不会自己用英文查找的吗?你用以下这句话查找:lifetime of the cooling system of James Webb Telescope 你直接把我那句话放 进Google,第一条搜素结果就是美国科学人杂志的报道,就是因为冷却剂氦会慢慢消失,所以,只能有5.5 到10年的寿命 “The infrared detectors onboard the JWST have to be cooled with liquid helium to prevent the thermal fluctuations within the detectors from swamping the astronomical signals. Because the helium will gradually be used up, JWST has a finite and short mission lifetime (5.5 to 10 years).”