- Francis Scott Key Fitzgerald (September 24, 1896 – December 21, 1940) was an American novelist, essayist, and short story writer. He is best known for his novels depicting the flamboyance and excess of the Jazz Age—a term he popularized in his short story collection Tales of the Jazz Age. During his lifetime, he published four novels, four story collections, and 164 short stories. Although he achieved temporary popular success and fortune in the 1920s, Fitzgerald received critical acclaim only after his death and is now widely regarded as one of the greatest American writers of the 20th century.
- Open cluster (Wikipedia)
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. Each one is loosely bound by mutual gravitational attraction and becomes disrupted by close encounters with other clusters and clouds of gas as they orbit the Galactic Center. This can result in a loss of cluster members through internal close encounters and a dispersion into the main body of the galaxy. Open clusters generally survive for a few hundred million years, with the most massive ones surviving for a few billion years. In contrast, the more massive globular clusters of stars exert a stronger gravitational attraction on their members, and can survive for longer. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring.