The hottest star in the Orion Nebula has a surface temperature of 40,000 K. At what wavelength does it radiate the most energy?
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- The white dwarf star Sirius B has a luminosity of 0.025 L⊙. If you were 1 AU from Sirius B, would that star appear brighter or fainter than the full Moon appears from Earth? If Sirius B were substituted for the Sun, what would Earth’s average temperature become? (Earth’s current average temperature is T = 287K)Sirius is the brightest star in the sky (but is located in the Southern hemisphere). It has a luminosity of 25.4 LSun and is 2.67 parsec away (1 parsec= 3.086 ×1016 m). What flux is received on Earth from Sirius? How manytimes smaller is this than the flux from the Sun?Which star is a white supergiant star that is brighter and hotter than the Sun?
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