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What Do We Know About Stars
Name: What Do We Know About Stars
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Our sun is a dwarf star. We are accustomed to think of the sun as a “normal” star, and in many respects, it is. Technically, as far as “normal” stars go (that is, astronomical objects that produce their own energy through sustained and stable hydrogen fusion), there are only “dwarfs,” “giants” and “supergiants.”. 18 Dec - 6 min - Uploaded by The Science Asylum Astronomers and astrophysics say we know a lot about stars.
We can even make predictions. Newton used a prism to split white light into a spectrum of color, and Fraunhofer's high-quality prisms allowed scientists to see dark lines of an unknown origin. Main sequence stars like our own sun exist in a state of nuclear fusion during which they will emit energy for billions of years by converting hydrogen to helium.
Stars evolve over billions of years. At this point, which scientists have yet to observe, such stars become known as black dwarfs. Spectroscopes are a very important tool used by astronomers.
As you probably realize, astronomers must rely on the light that we can measure from the various astronomical objects. We can't put a star into a laboratory! The spectrum of a star can tell us the temperature, size, and composition of the star. Product details. For ages ; Format Paperback | 48 pages; Dimensions x x 5mm | g; Publication date 01 Aug ; Publisher Raintree. Our Sun is a typical star (Credit: JTB Media Creation Inc/Alamy Stock If it were not for special detectors, we would never know they were there.
How stellar is your knowledge of stars? Test yourself with this interactive quiz. Learn how stars form, how stars and constellations are named, what happens So far, we have learned that hundreds also have planets orbiting them. . Objects smaller than a tenth of a solar mass do not have enough. A star is type of astronomical object consisting of a luminous spheroid of plasma held together Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations.
. Herschel is also noted for his discovery that some stars do not merely lie along the same line of sight.