Read e-book online An Introduction to Astronomy and Astrophysics PDF

By Pankaj Jain

ISBN-10: 1439885907

ISBN-13: 9781439885901

Astronomy is the sector of technological know-how dedicated to the examine of astronomical gadgets, comparable to stars, galaxies, and nebulae. Astronomers have accrued a wealth of data in regards to the universe via 1000s of years of painstaking observations. those observations are interpreted via actual and chemical legislation standard to mankind. those interpretations offer information regarding the character of those astronomical items, making an allowance for the deduction in their floor and inside stipulations. The technology linked to those interpretations is named astrophysics.

An advent to Astronomy and Astrophysics

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

  • Addresses key physics techniques 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 homes 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 sun process, the dynamics of galaxies, and the basics of contemporary cosmology
  • Explores the universe at excessive redshifts, the place it really is ruled via gadgets similar to energetic galaxies

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

An advent to Astronomy and Astrophysics

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

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Example text

2) Here we are primarily interested in the velocity vectors of stars, besides their position vectors. 2: The position vector r of point P in a three-dimensional space. In three dimensions, the position of any object is specified by three coordinates. We can choose these to be the Cartesian coordinates (x, y, z). 2. In this figure, P C and P Q are perpendicular to the z-axis and the x−y plane, respectively. Also, QA and QB are perpendicular to the x- and y- axes, respectively. The z component of r is equal to z = r cos θ.

2 27 Reflecting Telescope A reflecting telescope uses a concave mirror as the objective, which forms its image due to reflection. A concave mirror is parabolic in shape. 13. A parallel beam of light that may be inclined to the axis is focused at a point on the focal plane, analogous to the image formed by a convex lens. The image of an astronomical object, formed by a concave mirror, is located on the same side as the object, in contrast to the image formed by a convex lens. 13: A parabolic concave mirror focuses a parallel beam of light at a point F on its axis called the focal point.

The object would be perceived to be located at very large, nearly infinite distance. The advantage of viewing through a telescope is that the image is brighter and magnified. Brightness: The fact that the image formed by a telescope is brighter is easily understood. It collects light over a larger area, the area of the objective, in comparison to the eye. The light is then focused over a small area, producing a bright image. This LGP is a very important property of a telescope. It is proportional to the area of the objective, or equivalently the square of its radius (R), that is, LGP ∝ R2 .

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An Introduction to Astronomy and Astrophysics by Pankaj Jain


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