The call of the stars; a popular introduction to a knowledge of the starry skies with their romance and legend . versy thanany other of the solar system. It is a ruddyHttle planet about 4230 miles in diameter, revolvingaround the Sun at an average distance of 141,500,000miles in mean solar days, which constitutes aMartian year. In consequence of the eccentricityof? its orbit (), which is greater than that of anyother planet except Mercury, its distance from the Sunvaries as much as 26,000,000 miles. At its nearestapproach to that luminary, the planet is 128,000,000miles dist
The call of the stars; a popular introduction to a knowledge of the starry skies with their romance and legend . versy thanany other of the solar system. It is a ruddyHttle planet about 4230 miles in diameter, revolvingaround the Sun at an average distance of 141,500,000miles in mean solar days, which constitutes aMartian year. In consequence of the eccentricityof? its orbit (), which is greater than that of anyother planet except Mercury, its distance from the Sunvaries as much as 26,000,000 miles. At its nearestapproach to that luminary, the planet is 128,000,000miles distant from it, and 154,000,000 miles whenfarthest away. Its motion varies in different portionsof its orbit, but the average velocity is fifteen milesa second, and it travels over about four-tenths of adegree in the heavens in a day. It receives on theaverage less than half as much solar light and heatas does the Earth, though when the planet is near-est the Sun, it receives forty per cent, more heat andlight than when at its greatest distance from it. By reason of its proximity to the Earth, Mars comes 366. Yerkes Observatory Plate XXXIV. The Planet Mars, Region of Syrtis Major (Showing change due to rotation) Mars and the Planetoids 367 into opposition every 780 days. This constitutes itssynodic period, which is by far the longest in theplanetary system. At the average opposition theplanet approaches the Earth to within 48,600,000 an opposition occurs near the planets perihelion,the distance is reduced to 35,000,000 miles, but ifnear aphelion, it is increased to 61,000,000 miles. Atthe time of conjunction the planets distance from theEarth sometimes amounts to as much as 249,000,000miles. When Mars is at its minimum distance fromthe Earth, it is nearer than any other object in thenight-sky, with the exception of the Moon, and attimes Venus and Eros, and perhaps an occasionalcomet. It is then in a most favourable position fortelescopic observation, and is more than fift
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcon, booksubjectstars
