Let the number density (stars/volume) of stars be p. Take it to be uniform throughout theuniverse. Calculate the number of stars dN contained in a shell around the earth at adistance from R to R + dR, and calculate the total light intensity from the stars (assume allthe stars emit with the same power) in this shell.

Here is the step-by-step explanation:Given:Number density of stars =ρ (stars per unit…

Answered: Let the number density (stars/volume)…

Foundations of Astronomy (MindTap Course List)

14th Edition

ISBN:9781337399920

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter25: Astrobiology: Life On Other Worlds

Section: Chapter Questions

Problem 9P: The first radio broadcast was made on January 13, 1910. It was a live performance at New York Citys...

See similar textbooks

Similar questions

The figure above shows the light-curve obtained from continuous monitoring of the flux received from a star. Assuming that the dips arise because a planet orbiting the star passes between it and the observer once per orbit, estimate the orbital period (in days), the orbital semi-major axis (in Astronomical Units), and the physical radius of the planet (in units of the Earth’s radius). The star has a mass of 1.47 M⊙ and a radius of 1.84 R⊙.
Small differences in the wavelengths in the sun’s spectrum are detected when measurements are taken from different parts of the sun’s disk. Specifi cally, measurements of the 656-nm line in hydrogen taken from opposite sides on the sun’s equator—one side approaching Earth and the other receding—differ from each other by 0.0090 nm. Use this information to fi nd the rotational period of the sun’s equator. Express your answer in days. (The sun’s equatorial radius is 6.96 x 108 m.)
Don't provide hand writing solution
1.11 Calculate the Doppler width of a spectrum line from a neon discharge tube operating at a temperature of 100°C. The value of the Boltzmann constant k is 1.38 x 10-23 joules per degree Kelvin (J/K) and the mass of the neon atom is 3.34 x 10-26 kg. Take A = 600 nm and find the line width in both frequency and wavelength.
Please put all the equations into the pictures and we’ll explained so I can understand:).
Does a cylinder surface have "intrinsic' curvature? i.e if you stay on the cylindrical surface and make geometric measurement, will there be devia- tions from euclidean geometry?
The spectrum of a star is used to measure its radial velocity with respect to the Sun, the component of the star's velocity vector that is pa rallel to a vector connecting the star's centre to the centre of the Sun. The measurement relies on the Doppler effect, in which rad iation is shiftedin frequency when the source is moving towards or away from the observer. When a star emitting electromagnetic radiation of frequency v moves with a speed s relative to an observer, the observer detects radiation of f requency vreceding, = vf or vapproaching = v/f, where f = {(1 - s/c)/(1 + s/c)}1/2 and c is the speed of light. (a) Three lines in the spectrum ofatomic iron of the star HDE 271 182, which belongs to the Large Magellanic Cloud, occur at 438.882 nm, 441.000 nm, and 442.020 nm. The same lines occur at 438.392 nm, 440.510 nm, and 441.510 nm in the spectrum of an Earthbound ironarc. Determine whether HDE 271 182 is receding from or approaching the Earth and estimate the sta r's radial…
The first radio broadcast was made on January 13, 1910. It was a live performance at New York Citys Metropolitan Opera House. Since that time, how far has that radio broadcast traveled in light-years? In the solar neighborhood there is, on average, one star system per 400 cubic light-years. How many star systems could have heard those opera singers? (Note: The volume of a sphere = 43r3.)
With what type of electromagnetic radiation would you observe: A. A star with a temperature of 5800 K? B. A gas heated to a temperature of one million K? C. A person on a dark night?
Suppose a star 1000 times brighter than our Sun (that is, emitting 1000 times the power) suddenly goes supernova. Using data from Table 7.3: (a) By what factor does its power output increase? (b) How many times brighter than our entire Milky Way galaxy is the supernova? (c) Based on your answers, discuss whether it should be possible to observe supernovas in distant galaxies. Note that there are on the order of 1011 observable galaxies, the average brightness of which is somewhat less than our own galaxy.
Longs Van aw rejtoug] - consider a liquid mixture of components 1,2, 3, 4. The excess Gibbo energies of all the binaries, formed by these components obey relations of the formi Aijxjxj G₁₁ RT where Alj is the const characteristic of the i-j binary. Desire an expression for the co-efficient of component-I in the quaternary solution. وعاد سامانه . NL = enemical Engg Thermodyamies Question Torture TA gif croftrum svedo sit
Calculate the magnitude of axb when Ja - 12, b| - 20 and the angle between a and b is 0 = 450

SEE MORE QUESTIONS

Recommended textbooks for you

Foundations of Astronomy (MindTap Course List)

Physics

ISBN:

9781337399920

Author:

Michael A. Seeds, Dana Backman

Publisher:

Cengage Learning

Stars and Galaxies (MindTap Course List)

Physics

ISBN:

9781337399944

Author:

Michael A. Seeds

Publisher:

Cengage Learning

College Physics

Physics

ISBN:

9781938168000

Author:

Paul Peter Urone, Roger Hinrichs

Publisher:

OpenStax College

Foundations of Astronomy (MindTap Course List)

Physics

ISBN:

9781337399920

Author:

Michael A. Seeds, Dana Backman

Publisher:

Cengage Learning

Stars and Galaxies (MindTap Course List)

Physics

ISBN:

9781337399944

Author:

Michael A. Seeds

Publisher:

Cengage Learning

College Physics

Physics

ISBN:

9781938168000

Author:

Paul Peter Urone, Roger Hinrichs

Publisher:

OpenStax College

Astronomy

Physics

ISBN:

9781938168284

Author:

Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:

OpenStax

Modern Physics

Physics

ISBN:

9781111794378

Author:

Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS