Sentences with phrase «proper motion across»

Not exact matches

Those measurements, however, were not accurate enough to obtain parallax, and relied instead on tracking the star - forming region's so - called «proper motion» across the plane of the sky.

Portegies Zwart proposes identifying stellar relatives via their proper motion, or apparent movement across our line of sight, their position in the sky, and their chemical signatures, which he likens to their stellar DNA.