United States or Cocos Islands ? Vote for the TOP Country of the Week !
Sir Norman Lockyer promptly perceived the applicability of the surprising discovery of line-shiftings through end-on motion to the study of prominences, the discontinuous light of which affords precisely the same means of detecting movement without seeming change of place, as do lines of absorption in a continuous spectrum.
The components are approximately equal, both in mass and light, and the system formed by them is transported towards us with a speed of some sixteen miles a second. The line-shiftings so singularly communicative proceed, in this star, with perfect regularity. This new class of "spectroscopic binaries" could never have been visually disclosed.
Word Of The Day