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The main sequence is visible as a prominent diagonal band from upper left to lower right. This plot shows 22,000 stars from the Hipparcos Catalog together with 1,000 low-luminosity stars (red and white dwarfs) from the Gliese Catalogue of Nearby Stars. In astronomy, the main sequence is a classification of stars which appear on plots of stellar ...
Stellar classification. In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines.
Stellar evolution is the process by which a star changes over the course of its lifetime and how it can lead to the creation of a new star. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the current age of the ...
Star of Bethlehem. Adoration of the Magi by Florentine painter Giotto di Bondone (1267–1337). The Star of Bethlehem is shown as a comet above the child. Giotto witnessed an appearance of Halley's Comet in 1301. The Star of Bethlehem, or Christmas Star, [ 1] appears in the nativity story of the Gospel of Matthew chapter 2 where "wise men from ...
Island of stability. A diagram by the Joint Institute for Nuclear Research showing the measured (boxed) and predicted half-lives of superheavy nuclides, ordered by number of protons and neutrons. The expected location of the island of stability around Z = 112 ( copernicium) is circled. [ 1][ 2] In nuclear physics, the island of stability is a ...
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or " star -forming regions", collapse and form stars. [ 1] As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to ...
Phantasy Star Online 2 [a] is a free-to-play online action role-playing game in the Phantasy Star series, developed by Sega Sapporo Studio and published by Sega.It was created as a successor to Phantasy Star Online and Phantasy Star Universe, Phantasy Star Online 2 features gameplay elements and aesthetics reminiscent of previous Phantasy Star games while incorporating a few unique twists on ...
StarCraft II. StarCraft II is a military science fiction video game created by Blizzard Entertainment as a sequel to the successful StarCraft video game released in 1998. Set in the future, the game centers on a galactic struggle for dominance among the various fictional races of StarCraft . StarCraft II single-player campaign is split into ...
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