The ruler length and width measurements reflected the largest bias, regardless of wound shape [8]. The standard error of measurement (SEM) is defined as the difference between an observed score and a true score, so the SEM is an indication of the imprecision of a measurement technique [17].
Washington: Runaway planets zipping through space at mind-numbing speeds of 30 million miles per hour are now the fastest objects in the universe, says a study. Seven years ago, the discovery of the first runaway star, shooting out of our Galaxy at a staggering speed of 1.5 million mph, set astronomers on a course of exploration.
NASA Helios 2 space probe is the fastest man-made object ever. It set a record speed of 157078 mph during the mission. Helios 2 also has made a closer approach to the Sun than its predecessor. Helios 2 has looped around the Sun at a record distance of 0.29 AU from the surface. Helios 2 launched on January 15, 1976.