If a star is moving rapidly towards us, how does the doppler shift affect its spectrum? Is it redshifted or the spectrum is blueshifted?
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If a star is moving rapidly towards us, how does the doppler shift affect its spectrum? Is it redshifted or the spectrum is blueshifted?
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- What is the relationship between the color of a reflection nebula and the color of the star that illuminates it?Integrate the first equation over all wavelengths to find an expression for the total luminosity of a black body star. (See the second equation for a hint)How many times hotter than our sun is the hottest type O star, which has a surface temperature 40,000 K? Number times hotter =
- Barnard's Star is the 2nd closest star to Sol (~ 6 light years). It is moving toward the Earth with a speed of 110 km/s. Calculate the blue shift of light from Barnard's star, defined by AX/X. OA: OB: OC: OD: OE: -3.668x10-4 -4.586x10-4 -5.732x10-4 -7.165x10-4 OF: OG: -8.956x10-4 -1.120x10-3 -1.399x10-3 OH: -1.749x10-3A certain star has a temperature twice that of the Sun and a luminosity 64 times greater than the solar value. What is its radius, in solar units?How is the blue color of a reflection nebula related to the blue color of the daytime sky?
- The hottest star in the Orion Nebula has a surface temperature of 40,000 K. At what wavelength does it radiate the most energy?Studying the spectrum of a star, we see that the Haline (l= 656.285nm) has been shifted to 656.286 nm. Is the star moving towards us or away (explain your answer) How fast is the star moving with respect to us?Why are emission nebulae red ?