- Stars - NASA Science
Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements Every star has its own life cycle, ranging from a few million to trillions of years, and its properties change as it ages Birth Stars form in large clouds of gas and dust called molecular clouds
- Star | Definition, Light, Names, Facts | Britannica
Star, any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources This article describes the properties and evolution of individual stars Included in the discussion are the sizes, energetics, temperatures, masses, and chemical compositions of stars
- Star - Wikipedia
A star is a luminous spheroid of plasma held together by self-gravity [1] The nearest star to Earth is the Sun Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light
- Stars: Facts about stellar formation, history and classification
Stars are typically classified by their spectrum in what is known as the Morgan-Keenan or MK system, according to the European Southern Observatory There are eight spectral classes, each
- Stars—facts and information | National Geographic
Stars spend 90 percent of their lives in their main sequence phase Now around 4 6 billion years old, Earth’s sun is considered an average-size yellow dwarf star, and astronomers predict it will
- Star Facts - Interesting Facts about Stars - Space Facts
Star birth can take millions of years and create families of stars Astronomers see examples of star formation in nebulae throughout our own Milky Way Galaxy and in many other galaxies The most famous and closest stellar nursery to Earth is the Orion Nebula, which lies about 1,500 light-years away and is visible to observers from November
- Life Cycle of a Star: Stages, Facts, and Diagrams - Science Facts
What is a Star? A star is a giant sphere of extremely hot, luminous gas (mostly hydrogen and helium) held together by gravity A few examples of well-known stars are Pollux, Sirius, Vega, Polaris, and our own Sun Stars are essentially the building blocks of galaxies and are the source of all the heavier elements
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