By Pankaj Jain

Astronomy is the sphere of technology dedicated to the examine of astronomical items, comparable to stars, galaxies, and nebulae. Astronomers have collected a wealth of information in regards to the universe via countless numbers of years of painstaking observations. those observations are interpreted by means of actual and chemical legislation accepted to mankind. those interpretations provide information regarding the character of those astronomical gadgets, taking into consideration the deduction in their floor and inside stipulations. The technological know-how linked to those interpretations is named astrophysics.

An advent to Astronomy and Astrophysics

offers a complete advent to astronomy and astrophysics, entire with illustrative examples and illuminating homework difficulties. Requiring a familiarity with simple physics and arithmetic, this undergraduate-level textbook:

  • Addresses key physics options proper to stellar observations, together with radiation, electromagnetic spectrum, photometry, non-stop and discrete spectrum, and spectral lines
  • Describes tools used for astronomical observations in addition to how the radiation got is characterised and interpreted to figure out the houses of stars
  • Examines the constitution of stars, the elemental equations which clarify stars in equilibrium, and the fusion reactions taking place in stellar cores
  • Discusses the evolution of stars, the sunlight process, the dynamics of galaxies, and the basics of recent cosmology
  • Explores the universe at excessive redshifts, the place it truly is ruled by way of gadgets akin to energetic galaxies

Solutions handbook and determine slides on hand with qualifying path adoption

An creation to Astronomy and Astrophysics

teaches scholars the way to interpret the evening sky, delivering them with a severe knowing of the celebs and different heavenly bodies.

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Extra resources for An Introduction to Astronomy and Astrophysics

Sample text

In the infrared, we also see small windows where the atmosphere allows significant transmission. 7: Two distant point objects at an angular separation θ viewed by a telescope. 8. 7. We can resolve these two objects only if their image is clearly separated. A telescope has two basic components: an objective and an eye piece. The objective receives light from the astronomical object and forms its image. This is the most important component of a telescope. It may consist of a convex lens or a concave mirror.

N=1 θ n = nk θ n = nk−1 . 18: A plane parallel model of the atmosphere. We split the atmosphere into several layers with refractive indices n0 , n1 ... nk . Beyond the kth layer we assume that the refractive index is unity, corresponding to vacuum. A ray of light strikes the top of the atmosphere at an angle θ relative to the normal to the surface. After undergoing refraction through the atmosphere, it strikes the surface of Earth at an angle ξ. (Adapted from H. 1 Theoretical Limit on Resolution A fundamental limit on the resolution of any instrument, which may be the human eye or a telescope, arises due to diffraction.

1 Equatorial Mount . . . . . . . . . . . . . . . . . . . . 2 Azimuthal Mount . . . . . . . . . . . . . . . . . . . . Interferometry . . . . . . . . . . . . . . . . . . . . . . . . . . Observations at Other Wavelengths . . . . . . . . . . . . . . . 17 20 23 24 27 29 31 32 33 33 33 33 34 We observe the Universe at many different wavelengths, visible light being most common.

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