why do dark streaks appear in visible light images of the Trifid nebula, but appear bright in an infared image
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A: The rate of expansion, vkm/s=35.0 km/s The expansion radius, r=0.3 arc s The time duration,…
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A: Dispersion. Despersion is a phenomena in which when light passes beteen 2 particle it disperses.
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A: Let us first convert the given distance (D) between nebula and earth from light year to parsecs :…
Q: Describe each of the following nebulae and how they can be observed: HIl region Cold hydrogen gas…
A: (1) HII region (2) Cold hydrogen gas (3) Dust clouds
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A: From Kepler’s law,
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A: transit depth is the ratio of surface area of planet and the star transit depth = πRp2πRs2 where Rp…
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A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…
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Q: The star HD 93250 in the Carina Nebula is a bright O-type star. It has a reported apparent magnitude…
A: Using the distance modulus equation, we have: m V - MV = 5*log(d/pc) - 5 Substituting the values…
Q: If our Sun were surrounded by a cloud of gas, would this cloud be an emission nebula? Why or why…
A: Emission nebulae are formed in regions surrounding young stars. When a star is formed in the…
Q: Why don't red dwarfs become giant stars?
A: Red dwarf stars or M-type stars are small stars with a mass of 0.08 to 0.6 times the mass of the…
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A: Given data: Mass of the Neutron star is, M= 1.4 Ms Where, Ms - Mass of the sun Therefore, Mass of…
Q: What is the relationship between the color of a reflection nebula and the color of the star that…
A: A nebula is a collection of cosmic dust, hydrogen, and other molecular clouds. They act as a region…
Q: The radius of the nebula is about 0.401 light-years. The gas is expanding away from the star at a…
A: Given that, r=0.401 light year1 light year=9.46×1015 mr=0.401×9.46×1015=3.79×1015 mThe particle at…
Q: How do the spectra of H II regions differ from the spectra of reflection nebulae? Why?
A:
Q: If a contracting protostar is two times the radius of the Sun and has a temperature of only 1890 K,…
A:
Q: How is the blue color of a reflection nebula related to the blue color of the daytime sky?
A: Nebula is a giant cloud of dust and gas. Some are formed after the explosion of a star when it's…
Q: The current precision of the Doppler shifts in the absorption lines in stellar spectra is ~3 km s-1.…
A:
Q: Calculate the angular diameter of a prestellar nebula of radius 125 AU lying 150 pc from Earth.…
A: We will first write an expression relating the angle subtended by an arc of a circle at the center.…
Q: if a protostellar disk is 260 au in radius and the disk plus the forming star together contain 7…
A:
Q: Why are red dwarfs very dim.
A: Stars are formed from the interstellar medium. When the gas inside the interstellar medium becomes…
Q: Why are emission nebulae red?
A: Emission nebulae are formed in regions of star formation. The new stars ionize the interstellar…
Q: Why is it that stars of greater mass (and thus possess more fuel for nuclear fusion) spend less time…
A: It is asked why the stars of greater mass which possess more fuel for nuclear fusion spend less time…
why do dark streaks appear in visible light images of the Trifid nebula, but appear bright in an infared image
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