Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 240
t at itssmaller extremity ; in smaller comets the tail is generally acomparatively narrow streamer where it issues from the head § 3(K5] TYPES OF COMETS TAILS. 229 of the comet, brushing out as it recedes, and often showing,in photographs, peculiar knots and condensations, which arenot visible with… … Fig. 63. — A Comets Tail at Different Points in its Orbit near Perihelion. the comet, but on a curve convex to the comets motion, asshown in Fig. 63; but the stronger the repulsion the less thecurvature, and the straighter the tail. The nature of the forcewhich repels the particles of a comet is,…
Astronomy
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