Want to know how far away a subject is? Measure the exact distance with the best rangefinder binoculars, and stargaze into the bargain. When you purchase through links on our site, we may earn an ...

2.1. GRIS GRIS (Collados et al., 2012) is a spectropolarimeter consisting of a 6 m focal-length Czerny–Turner spectrograph and a polarimeter built from the heritage of TIP-II (Collados et al., ...