arcsec,

6 arcsec (solid line), and r ngs > 3.6 arcsec (dashed
两个棱镜的斜面相对放置,且二面角成90±10 arcsec.
pre-discovery 2007 image of the hr 8799 planetary
5 nm,高分辨x射线摇摆曲线测试测得半高峰宽为47.5 arcsec
hermes: the contribution to the cosmic infrared b