Proper motion is the astrometric measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the...

produced a series of catalogues: L – Luyten, Proper motion stars and White dwarfs Luyten, W. J., Proper Motion Survey with the forty-eight inch Schmidt Telescope...

out along the relativistic jets emitted from these objects can have a proper motion that appears greater than the speed of light. All of these sources are...

degrees of the south celestial pole. This is due to axial precession and proper motion of Sirius itself which moves slowly in the SSW direction, so it will...

those within 10 parsecs. Nearby stars often have a relatively high proper motion, so astrometric binaries will appear to follow a wobbly path across...

a total of 451 proper names of stars. Of the roughly 10,000 stars visible to the naked eye, only a few hundred have been given proper names in the history...

2017 revealed that the structure observed by Herschel shows no common proper motion with Zeta Reticuli. In these observations, no significant flux has been...

found at previously unsurveyed frequencies of 100 MHz and below. The proper motion of Geminga is 178.2 mas/year which corresponds (at a distance of 250...

photographic plates taken at different times during a proper motion survey. These showed large proper motion and parallax similar in both size and direction...

Brownian motion is the random motion of particles suspended in a medium (a liquid or a gas). This motion pattern typically consists of random fluctuations...