If star B is a 5th magnitude star and star C is 9th magnitude, what is their brightness ratio? Light from Sirius has 24.2 times as much flux as the light from Polaris. What is their magnitude difference? If the apparent magnitude of Polaris is 2, what is the apparent magnitude of Sirius?

Q: A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R…

A:

Q: Consider two identical stars, A and B. Star B is 10 times farther away than star A. What is the…

A: Two identical stars A and B are given which are at different distances.

Q: DISTANCE IN

A: Parallax angle is in mas,  we can convert angle to distance in parsec by following formula Distance…

Q: If a star is located at 62.5 pc and has an apparent magnitude of 6 what is it absolute magnitude?

A: The brightness of a star is determined by its composition and distance from the Earth. There are two…

Q: A star has a parallax of 0.8 seconds of arc. What is the distance of the star?

A: Parallax can be defined as the change in the position of an object due to a change in the observer's…

Q: How far away would the Sun need to be to be just visible to the naked eye (apparent magnitude =…

A: Solution: Given that apparent magnitude, m = 5.90 the absolute magnitude of the Sun, M = 4.83

Q: A star is observed at a distance of 90 pc. What will be its parallax angle?

A: Parallax is defined as the change in the apparent position of an object due to a change in the…

Q: Favorite Star Polaris is 132 pc from Earth and has an apparent magnitude of 2.5. What is its…

A: When the brightness of a star is measured there are two ways, Apparent and absolute magnitudes.…

Q: What star has the largest stellar parallax as measured from opposite ends of the Earth's orbit about…

A: Parallax is the apparent displacement of an object because of a change in the observer's opinion.…

Q: Calculate the distance of a star if the stellar spectrum indicates an absolute magnitude of -10.0,…

A: The expression for the distance can be written as m-M=5logd10…

Q: If a star has a parallax of 0.016 arc second how far is it?

A: Parallax is the shift in the apparent position of stars when observed from different positions. This…

Q: Why does the luminosity of a star depend on both its radius and its temperature?

A: Luminosity is the radiant power emitted by star. The luminosity is measured in Watt or Joules per…

Q: According

A: There is a simple relationship between a star's distance and its parallax angle: d = 1/p The…

Q: Two stars have the exact same luminosity, but star Y is four times dimmer looking that star X. This…

A: Basic Details Two stars star X and star Y have same luminosity. The brightness of the star is…

Q: If a star's absolute magnitude value is significantly larger than its apparent magnitude value…

A: Absolute magnitude Mv: The magnitude that a star is expected to have if it were at a distance of 10…

Q: A certain star is 13.7 times dimmer than a star with apparent magnitude m = 3.9.  What is the…

A: We are given the ratio of brightness of stars. We are given the apparent magnitude of the brighter…

Q: Star A has an apparent magnitude of –1.5 and is 12.6 light-years from Earth. Star B has an apparent…

A: Given: dA=12.6ly=3.863parsec, dB=15.6ly=4.783parsec, mvA=-1.5, mvB=0.4 The apparent magnitude of a…

Q: A distant galaxy has an apparent magnitude of 13 and is 5,000 kpc away. What is its absolute…

A: Apparent Magnitude The apparent magnitude of a star or a galaxy is the measure of how bright the…

Q: The apparent magnitude of a star is (4.3) and the parallax angle is (0.161) arcseconds. The absolute…

A:

Q: Consider two stars A and B, with apparent magnitudes mA = 3 and mB = 13. How much brighter (in…

A: Given, mA = 3    and mB = 13 Now, the difference in apparent magnitude is                 n = mB -…

Q: Which of the following is least reasonable regarding the magnitude scale: Group of answer choices…

A: The magnitude scale in astronomy helps us to quantify the brightness and distance of celestial…

Q: The figure below shows the spectra of two stars on the same scale (Star A = red line; Star B = green…

A: According to Hubble's law, velocity of recession of star from our earth is directly proportional to…

Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…

A:

Q: The distance to the Pleiades is 136.2 pc. The absolute V magnitude (M,) of Sirius is -0.57. What…

A: Given information: It has been assumed that Sirius is situated at Pleiades, which is at a distance…

Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line…

A: vr=cλ0-λλ0

Q: Given star A with apparent visual magnitude mv = 6.5, and star B with mv = 4.4, what is the flux…

A: Given, star A with apparent visual magnitude mA = 6.5, and star B with mB = 4.4, the flux ratio…

Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm . If the…

A: Wavelength of (λ°) = 481.6 nm Difference of wavelength ∆ λ = λ- λ° = 486.1- 485.8 =  0.3 nm Speed of…

Q: Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1…

A:

Q: 5) Let's use this expression to solve a problem. Star X and Star Y are intrinsically identical…

A: Given, star X is located 20 light-years from earth star Y is located 40 light-years  from earth…

Q: You are trying to take an image of a particular star with apparent magnitude m=10, and need to…

A: Given: m=10 diameter=0.07 t=79 min

Q: You see a blue star directly over Avalon's equator. It appears to be moving north at 5.0 arcseconds…

A: Given: The star moves north at 5.0 arcseconds per year. To determine: The distance of this star from…

Q: If we view a star now, and then view it again 6 months later, our position will have changed by the…

A:

Q: The white dwarf star Sirius B has a luminosity of 0.025 L⊙. If you were 1 AU from Sirius B, would…

A: Given,Temperature, Apparent magnitude of the sun, The luminosity of the star sirius B, The…