Informations about stars being created in space.

Stars have been used for celestial navigations and religious practices with many ancient astronomers believing they were immutable. They grouped the stars into constellations and used them to track planets and the inferred position of the Sun. Later, medieval Islamic astronomers gave Arabic names to many stars that still remained used to this day. They were the first to build large observatory research institutes. In 1838, the first direct measurements of the distance of a star – 61 Cygni – were made by astronomer Friedrich Bessel using the parallax technique. In 1913, the Hertzsprung-Russell diagram was developed and in 1921 Albert Michelson made the first measurements of a stellar diameter using an interferometer. In 1925, Cecilia Payne first proposed that stars were primarily made out of hydrogen and helium. Since then, stars have been categorized into many divisions, and many mysteries were revealed to us. The sheer variety of stars is simply overwhelming.

• What type of stars do they form?
• Are the stars formed as planets?
• How long will the stars exist?

Why are stars Created in space?

Stars are luminous spheres made of plasma – a superheated gas threaded with a magnetic field. They are made mostly of hydrogen, which stars fuse in their cores. That process releases energy, which pushes against the weight of the outer layers of the star and keeps it stable. The energy is also released as heat and light, which are radiated out to space. Stars are the main components of galaxies, and were among the first objects to form in the early universe. The closest star to Earth is the Sun.

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