Assuming your star tracker has a field of view of 20 by 10 degrees and you can see all stars in the FOV. With the Tycho-2, what is the average number of stars in the FOV? How many stars do you see on average with a 99% probability? Take 10 random viewing directions and check if they are in agreement with your 99% prediction.

Q: The difference in absolute magnitude between two objects is related to their fluxes by the…

A: The difference in absolute magnitude between two objects is related to their fluxes by the…

Q: Recall that Hubble’s Law is given by V=HR; this means that H has units of inverse seconds (1/sec).…

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Q: The Stelan Bomann equation can be used to estimate the size of asteroids. "Sigma," the…

A: In case of a Black body radiation, Stefan-Boltzmann's law relates the radiant emittance of the black…

Q: d²p GMp %3D dt2 (a² + p2)3/2* 2. Suppose that p < a, that is, the star is deep inside the cluster.…

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Q: What is the ratio of the percent of metals in extreme Population I stars (3%) to that in extreme…

A: Given data: The percent of metals in extreme Population I stars is Npop I=3%  The percent of metals…

Q: he spectrum of a star is collected and we find the absorption line of Hydrogen-Alpha (the deepest…

A: We know that the Doppler effect, According to the doppler the formula of the doppler shift of the…

Q: A star is transited by a planet. From the measured period T and the transit duration t alone, show…

A: From Kepler’s law,

Q: An astronomical image shows two objects that have the same apparent magnitude, i.e., the same…

A: Let the luminosity of the star is Ls= LoLuminosity of  Milky Way galaxy, Lm=1011LoLuminosity of…

Q: A star with spectral type A0 has a surface temperature of 9600 K and a radius of 2.2 RSun. How many…

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Q: 12.4 • (a) What is the average density of the sun? (b) What is the av- erage density of a neutron…

A: We have given condition that  if the radius of the neutron star is 84.66  km? Then what is the the…

Q: Hertzsprung-Russell Diagram

A: In the sky, there are many groups of stars. Some of them are small. while some of them are large.…

Q: Consider two stars, A and B, of equal size. You take a spectrum of each star and find that the flux…

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Q: Find the speed for a star in which this line appears at wavelength 122.5 nmnm.

A: Given wavelength = 122.5 nm Hydrogen transition wavelength = 121.6 nm Speed of light is c = 3×108…

Q: Assuming that at the end of the He burning phase of the stellar core (r R_core). Calculate the…

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Q: The Kormendy relation for ellipticals can be written as He = 20.2 + 3.0 log R. where Re is the…

A: The kormendy relation for elipticals can be written asμe   =    20.2   +  3.0  logReμe   -    20.2…

Q: Our galaxy is approximately 100,000 light years in diameter and 2,000 light years thick through the…

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Q: velocity curve for a double line spectroscopic binary is shown in the sketch. The system is viewed…

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Q: If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength…

A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…

Q: 100 km s¹. Calculate the ruling density necessary to observe the Hydrogen- 3 emission line at the…

A: The wavelength of the hydrogen-B emission line is 4861 Angstroms. The line would be dispersed across…

Q: White Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and its density is about 2…

A: It is given that, M=0.98 solar mass=0.98×1.989×1030 kg=1.95×1030 kgρ=2×106 g/cm3=2×106×103…

Q: What is the wavelength in micrometers  of peak emission for a black body at 33.5°C? (c = 3.0 × 108…

A: Given values:Temperature of the black body:T = 33.5°C = 306.65 K Wein's displacement law:We know…

Q: Show work. For the following: A parsec is a distance equal to 3.26 light years. The speed of light…

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Q: Consider the image above of the Cassiopeia A (Cas A) supernova remnant. The supernova explosion that…

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Q: Question 2: The integrated light from the Milky Way globular cluster NGC 104 has an apparent…

A: Step 1: Given:  Apparent magnitude(mV) = 4.03 mag Absolute magnitude(MV) = -9.52 mag distance of NGC…

Q: A star has a period of P = 37 days. It has a radius of 5.7 times the radius of the sun. Calculate…

A: The period of the star: P = 37 days (37 x 24 x 60 x 60 seconds = 3.2 x 106 seconds); The radius of…

Q: Let us imagine that the spectrum of a star is collected and we find the absorption line of…

A: Since            ∆λ/λ   = v/c where  c = 3*10-8m/s v    = velocity of star…

Q: Φ(r) GM (r² +r²)¹/2

A: Gravitational Potential Density  Gravitational potential density is the density of an object at a…

Q: You are the leader of the international Event Horizon Telescope, a collaboration of radio…

A: Given that:Let D is the diameter of the instrument.

Q: Find the speed for a star in which this line appears at wavelength 120.5 nmnm. Express your answer…

A: Given: Wavelength λ = 120.5 nm or 1.205×10-7 m To determine: speed of a star Formula used: v=λc here…

Q: A star with spectral type A0 has a surface temperature of 9600 K and a radius of 2.2 RSun. How many…

A: Disclaimer: Since you have asked multiple question, we will solve the first question for you. If you…

Q: Calculate the total number density ( ntot ) and the density ( ρ ) at a depth in a star composed of…

A: Given data: The temperature, T=9500 K The atoms are 35% ionised. Here as given, The energy,…