By Pankaj Jain

Astronomy is the sphere of technological know-how dedicated to the learn of astronomical items, equivalent to stars, galaxies, and nebulae. Astronomers have amassed a wealth of information concerning the universe via enormous quantities of years of painstaking observations. those observations are interpreted by way of actual and chemical legislation well-known to mankind. those interpretations provide information regarding the character of those astronomical items, taking into consideration the deduction in their floor and inside stipulations. The technology linked to those interpretations is termed astrophysics.

An creation 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 recommendations appropriate 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 bought is characterised and interpreted to figure out the houses of stars
  • Examines the constitution of stars, the fundamental equations which clarify stars in equilibrium, and the fusion reactions happening in stellar cores
  • Discusses the evolution of stars, the sunlight method, the dynamics of galaxies, and the basics of contemporary cosmology
  • Explores the universe at excessive redshifts, the place it really is ruled via items corresponding to energetic galaxies

Solutions handbook and determine slides to be had with qualifying direction adoption

An advent to Astronomy and Astrophysics

teaches scholars easy methods to interpret the evening sky, offering them with a serious knowing of the celebrities and different heavenly bodies.

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Extra resources for An Introduction to Astronomy and Astrophysics

Sample text

What we typically observe is the visible light emitted by different atoms and ions at the surface of stars. This gives us information about the temperature, relative density of different elements and their state of ionization at the stellar surface. We also observe the Universe at other wavelengths, such as radio, microwave, infrared, ultraviolet, x-rays, and gamma-rays. Excluding the radio, most of these observations are made using space-based telescopes, as these frequencies are strongly absorbed by the Earth’s atmosphere.

7o in equatorial J2000 system. The origin for the longitude (SGL) is taken to lie along the intersection of the galactic and supercluster plane. 5o , where α and δ are the equatorial coordinates. 2 Space Velocity and Proper Motion of Stars The stars remain approximately fixed in the sky. Their relative positions, with respect to one another, change only slightly with time. This is attributed to their intrinsic motion. The shift is so small that it is detectable only over a long time interval with sophisticated instruments.

Aberration . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coordinate Transformations . . . . . . . . . . . . . . . . . . . 1 Transformation between Equatorial and Ecliptic Coordinate Systems . . . . . . . . . . . . . . . . . . . 2 Precession of Equinoxes . . . . . . . . . . . . . . . . . 3 Equatorial Mounting of a Telescope . . . . . . . . . . . 41 42 43 43 44 44 44 46 47 50 51 54 55 55 Astrometry is the branch of astronomy that deals with the positions and motions of heavenly objects.

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