| 单词 | infrared astronomy |
| 释义 | infrared astronomy The study of radiation from space in the infrared region of the spectrum (see infrared radiation). Some infrared radiation is absorbed by water and carbon dioxide molecules in the atmosphere but there are several narrow atmospheric windows in the near-infrared (1.15–1.3 µm, 1.5–1.75 µm, 2–2.4 µm, 3.4–4.2 µm, 4.6–4.8 µm, 8–13 µm, and 16–18 µm). Longer wavelength observations must be made from balloons, rockets, or satellites. Infrared sources are either thermal, i.e. emitted by the atoms or molecules of gases or dust particles in the temperature range 100–3000 K, or electronic, i.e. emitted by high-energy electrons interacting with magnetic fields as in synchrotron radiation. Detectors are either modified reflecting telescopes or solid-state photon detectors, usually incorporating photovoltaic devices |
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