The Far Ultraviolet Spectroscopic Explorer (FUSE), successfully launched on June 24, 1999, is an astrophysics satellite designed to provide high spectral resolving power (λ/Δλ of 24,000-30,000) and large effective area (20-70 cm{sup}2) over the wavelength interval of 90.5118.7 nm. The instrument consists of four normal-incidence, off-axis parabolic primary mirrors that illuminate separate Rowland-circle spectrograph channels equipped with holographic gratings and delay-line micro-channel plate detectors (see Fig. 1). The FUSE wavelength range is rich in spectral lines arising from stellar and interstellar gas, providing the opportunity to make important contributions to many areas of astronomy. In particular, FUSE will measure the abundance of deuterium in a range of astrophysical environments to determine the extent to which stellar processing has modified the primordial abundance of deuterium—thereby providing a better understanding of the amount produced in the Big Bang and the subsequent change in abundance as the universe aged.
展开▼
机译：远紫外光谱浏览器（FUSE），于1999年6月24日成功发射，是一种天体物理学卫星，旨在提供高光谱分辨能力（λ/Δλ为24,000-30,000）和大有效面积（20-70 cm {sup} 2） ）在90.5118.7 nm的波长范围内。该仪器由四个垂直入射的离轴抛物线主反射镜组成，它们分别照射配备有全息光栅和延迟线微通道板检测器的单独的罗兰圆光谱仪通道（见图1）。 FUSE波长范围内富含由恒星和星际气体产生的光谱线，从而为在许多天文学领域做出重要贡献提供了机会。特别是，FUSE将在一系列天体环境中测量氘的丰度，以确定恒星加工改变了氘的原始丰度的程度，从而更好地了解大爆炸产生的数量以及随后的变化。随着宇宙的衰老而丰富。
展开▼
