Parallax is a simple concept to understand, but as it relates to riflescopes it’s difficult to explain. According to Merriam-Webster, parallax is the apparent displacement or the difference in ...

Over the 25 years I’ve written this column, I’ve often marveled at the mind-boggling distances to many celestial objects. Astronomers don’t often use miles to express stellar and galactic distances ...

FOR three years, from 1893 to 1896, Mr. A. S. Flint, of the Washburn Observatory, has devoted himself indefatigably to the determination of stellar, parallax, and his results, contained in the ...

STELLAR PARALLAX BY MEANS OF PHOTOGRAPHY.—Prof. Pritchard has sent us his eminently successful “Researches in Stellar Parallax” by the aid of photography, from observations made at the Oxford ...