A primary astronomy .. . This has not been confirmed by any recent observer, and is therefore somewhatdoubtful.] LESSON XXYI SHADOWS OF THE PLANETS. ECLIPSES OF THE SUN. 521. What is an Eclipse ? It is a partial or total obscuration or darkening of theSun or Moon, by the intervention of some opake body. 522. How many kinds of Eclipses are there ? The first general division is into Solar and Lunar. 523. What is a Solar Eclipse?An Eclipse of the Sun. 524. What is a Lunar Eclipse ? An Eclipse of the Moon. 525. What is the firstpoint to be observed in consid-ering the subject of Eclipses ? The fac
A primary astronomy .. . This has not been confirmed by any recent observer, and is therefore somewhatdoubtful.] LESSON XXYI SHADOWS OF THE PLANETS. ECLIPSES OF THE SUN. 521. What is an Eclipse ? It is a partial or total obscuration or darkening of theSun or Moon, by the intervention of some opake body. 522. How many kinds of Eclipses are there ? The first general division is into Solar and Lunar. 523. What is a Solar Eclipse?An Eclipse of the Sun. 524. What is a Lunar Eclipse ? An Eclipse of the Moon. 525. What is the firstpoint to be observed in consid-ering the subject of Eclipses ? The fact that all theplanets, both primaryand secondary, castshadows in a directionopposite the Sun. 526. Upon what does theform and length of theseshadows depend? Upon the comjpara-t/we magnitude of theSun and planet, andtheir distance from each other. \ \ 10* 114 PRIMAET ASTEONOMY. 527. What would be the form of the Shadow if the Sun andplanet were of a size ? The shadow would be in the form of a cylinder. CYLINDRICAL 528. What would be the form of the Shadow if a planet werelarger than the Sun ? It would diverge or expand from the planet outward. DIVERGING SHADOW.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectastronomy, bookyear18
