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Stellar spectra provide evidence of star motion through the Doppler effect, which causes shifts in the wavelengths of light emitted by a star. If a star is moving towards us, its spectral lines shift towards the blue end of the spectrum (blueshift), while a star moving away from us exhibits a redshift, where spectral lines shift towards the red end. By analyzing these shifts in the spectral lines, astronomers can determine the velocity and direction of a star's movement relative to Earth. This technique has been crucial for understanding the dynamics of stars within galaxies and the expansion of the universe.
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What is a stellar spectra?
Stellar spectra are graphs or visual representations of the intensity of light emitted by a star at different wavelengths. They provide information about the star's temperature, chemical composition, and motion towards or away from Earth. Studying stellar spectra is crucial for understanding the properties and evolution of stars.
Why do stellar spectra have absorption lines?
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Who was the first person to classify stellar spectra by temperature?
Many people were involved in the current spectral classes.The person who first realised that the spectral sequence then categorised was in fact temperature, was Cecilia Payne.See related link for more information on her.
When was stellar parallax first observed?
Stellar parallax was first observed by Friedrich Wilhelm Bessel in 1838, when he measured the parallax of 61 Cygni. This discovery provided the first direct evidence of the Earth's orbital motion around the Sun.
Who discovered stellar aberration?
Stellar aberration was discovered by James Bradley in the early 18th century. He observed the apparent shift in the positions of stars due to the Earth's motion around the Sun. This discovery provided important evidence for the heliocentric model of the Solar System.
What is a stellar spectra?
Stellar spectra are graphs or visual representations of the intensity of light emitted by a star at different wavelengths. They provide information about the star's temperature, chemical composition, and motion towards or away from Earth. Studying stellar spectra is crucial for understanding the properties and evolution of stars.
Why do stellar spectra have absorption lines?
Need a different, better answer.
What has the author Charles R Cowley written?
Charles R. Cowley has written: 'The theory of stellar spectra' -- subject(s): Spectra, Stars 'An introduction to cosmochemistry' -- subject(s): Astrogeology, Astrophysics, Cosmochemistry 'Line identification studies using traditional techniques and wavelength coincidence statistics' -- subject(s): Abundance, Line spectra, Statistical analysis, Stellar spectra
What has the author Richard D Robinson written?
Richard D. Robinson has written: 'High-level manpower in economic development' 'Coordinated HST-EUVE observations of YZ CMi' -- subject(s): Stellar flares, Satellite observation, M stars, Ultraviolet spectra, Stellar spectra, Spaceborne astronomy
What has the author Thomas Espin written?
Thomas Espin has written: 'The distribution of stars of Type III and of stellar spectra in space'
What do scientists study to learn about the properties of stars?
Scientists study stellar spectra to learn about their properties such as temperature, chemical composition and relative chemical abundances, radial velocity, rotational speed etc.
What has the author David Tytler written?
David Tytler has written: 'Strong associated C IV absorption in low redshift quasars' -- subject(s): Absorption spectra, Interstellar gas, Quasars, Stellar spectra
What has the author Bengt E Westerlund written?
Bengt E. Westerlund has written: 'The Magellanic Clouds' 'Luminosity effects and colour-equivalents as measured in short stellar spectra' -- subject(s): Stars, Color, Spectra
What has the author Jennifer Catelli written?
Jennifer Catelli has written: 'Variability in the X-ray emission of H0538+608, an unusual AM Her-type cataclysmic variable' -- subject(s): Cataclysmic variables, Emission spectra, Light curve, Periodic variations, Stellar spectra, X ray astronomy, X ray spectra
What is absent spectra?
Absent spectra refer to regions in a spectrum where specific wavelengths of light are missing or not detected. This phenomenon can occur in various contexts, such as in absorption spectroscopy, where certain wavelengths are absorbed by a substance, leading to dark lines in an otherwise continuous spectrum. These gaps can provide valuable information about the composition and properties of the material being analyzed. In astrophysics, absent spectra can indicate the presence of elements or compounds in distant celestial bodies based on the wavelengths they absorb from stellar light.
What has the author Wayne Lee Waldron written?
Wayne Lee Waldron has written: 'A deep PSPC observation of the Cyg OB2 association' -- subject(s): Emission spectra, B stars, O stars, X ray sources, Radio observation, Spectrum analysis, Star clusters, X ray spectra, X ray astronomy, Radio spectra, X rays, Stellar spectra, Cygnus constellation
What has the author Viktor Viktorovich Sobolev written?
Viktor Viktorovich Sobolev has written: 'Theory of stellar spectra' -- subject(s): Spectra, Stars 'Moving envelopes of stars' -- subject(s): Stars, Spectra, Radiation 'Course in theoretical astrophysics' -- subject(s): Astrophysics 'A treatise on radiative transfer' -- subject(s): Atmospheres, Radiative transfer, Radiation, Stars, Planets
