欧洲空间局专门用作空间天体测量的伊巴谷卫星将于1988年上半年发射。
The ESA astrometry satellite HIPPARCOS will be launched in the first part of 1988 or later.
本文介绍了由地球人造卫星进行天体测量的两项计划,并提出了它们对天体测量学、天体物理学和恒星天文学的影响。
Two projects for astrometry from Earth satellites are described and their impact on astrometry, astrophysics and stellar astronomy are outlined.
这些齿可以像尺子一样用来异常精确的测量激光器、原子、天体或其它物体发出的光的频率。
The teeth can be used like a ruler to measure the light emitted by lasers, atoms, stars, or other objects with extraordinarily high precision.
应用推荐