These are known as hypervelocity stars, with some moving faster than the escape velocity of the Milky Way of around 600 kilometers (373 miles) per second. There is another star that is almost as ...
Fluorite triplet TakahashiTokyo, Japan The FCT-65D is a low-dispersion Fluorite Triplet refractor. It has a 400mm focal length and a f/6.2 focal ratio, and a high Strehl ratio of .98. It also comes ...