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A stellar association is a very loose star cluster, looser than an open cluster. A moving group is the remnant of such a stellar association. [1] Members of stellar associations and moving groups share similar kinematic properties, as well as similar ages and chemical composition. The list (below) is sorted by the distance to the Solar System ...
When singer/songwriter/guitarist Marc Bolan left the mod band John's Children at the end of June 1967, he formed a new group, Tyrannosaurus Rex. After a disastrous debut gig as an electric four-piece at the Electric Garden club on July 22, Bolan stripped the group down to an acoustic duo consisting of himself on vocals and guitar and Steve Peregrin Took on backing vocals and bongos.
Hertzsprung–Russell diagram. An observational Hertzsprung–Russell diagram with 22,000 stars plotted from the Hipparcos Catalogue and 1,000 from the Gliese Catalogue of nearby stars. Stars tend to fall only into certain regions of the diagram. The most prominent is the diagonal, going from the upper-left (hot and bright) to the lower-right ...
Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point. Direct motion or prograde motion is motion in the same direction as other bodies. While the terms direct and prograde are equivalent in this context, the former is the ...
Did you see a string of lights move across the sky over North Texas on Thursday night, more than a dozen of them in a straight line? The startling sight around 9:44 p.m., coming from the western ...
From an astronomy standpoint, planets go retrograde when it looks like they’re moving backward in the sky. By the way, this is an optical illusion: NASA stresses that the planets don’t ...
Stellar parallax is the basis for the parsec, which is the distance from the Sun to an astronomical object that has a parallax angle of one arcsecond. (1 AU and 1 parsec are not to scale, 1 parsec = ~206265 AU) Stellar parallax is the apparent shift of position ( parallax) of any nearby star (or other object) against the background of distant ...
Media category. Q11387. Additional Information. An open cluster is a type of star cluster made of tens to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, and many more are thought to exist. [1]