Astronomy: A Revision of Young's Manual of Astronomy, Volume 1 |
What people are saying - Write a review
We haven't found any reviews in the usual places.
Contents
1 | |
7 | |
11 | |
13 | |
14 | |
15 | |
16 | |
22 | |
198 | |
199 | |
200 | |
202 | |
203 | |
206 | |
208 | |
210 | |
23 | |
24 | |
30 | |
34 | |
37 | |
38 | |
41 | |
42 | |
45 | |
47 | |
48 | |
49 | |
50 | |
51 | |
52 | |
54 | |
55 | |
56 | |
58 | |
59 | |
60 | |
61 | |
62 | |
64 | |
66 | |
67 | |
68 | |
71 | |
74 | |
75 | |
76 | |
78 | |
80 | |
85 | |
89 | |
93 | |
95 | |
97 | |
99 | |
100 | |
104 | |
111 | |
112 | |
113 | |
114 | |
118 | |
119 | |
121 | |
122 | |
125 | |
127 | |
131 | |
135 | |
136 | |
137 | |
138 | |
139 | |
142 | |
143 | |
144 | |
146 | |
147 | |
148 | |
149 | |
156 | |
157 | |
158 | |
159 | |
163 | |
164 | |
166 | |
169 | |
176 | |
177 | |
178 | |
180 | |
181 | |
184 | |
185 | |
189 | |
191 | |
192 | |
193 | |
195 | |
197 | |
211 | |
212 | |
214 | |
215 | |
217 | |
218 | |
220 | |
222 | |
223 | |
224 | |
229 | |
230 | |
231 | |
233 | |
236 | |
237 | |
239 | |
241 | |
242 | |
244 | |
248 | |
249 | |
252 | |
258 | |
260 | |
261 | |
262 | |
264 | |
269 | |
273 | |
274 | |
277 | |
279 | |
283 | |
286 | |
293 | |
295 | |
307 | |
308 | |
310 | |
311 | |
313 | |
315 | |
317 | |
321 | |
329 | |
330 | |
334 | |
338 | |
340 | |
346 | |
349 | |
361 | |
364 | |
365 | |
366 | |
368 | |
369 | |
373 | |
374 | |
376 | |
378 | |
382 | |
384 | |
386 | |
387 | |
392 | |
398 | |
402 | |
406 | |
407 | |
411 | |
413 | |
416 | |
418 | |
425 | |
427 | |
433 | |
440 | |
448 | |
454 | |
471 | |
xvii | |
Other editions - View all
Common terms and phrases
according accurate actual altitude amount angle appears asteroids astronomical atmosphere attraction average axis body bright calculated called celestial circle comet computed correction declination density determined diameter direction disk distance earth eclipse effect equal equator error evidence exactly fall feet follows force give given gravity greater half horizon hour increase interval Jupiter known latitude length less light longitude lunar markings Mars mass mean measured meridian meteors method miles minutes month moon moon's motion moving nearly object observations Observatory opposite orbit parallax passes perihelion period perturbations photograph planet pole position possible present probably produced reflected regions relative ring rotation satellites seen shadow side sidereal solar star sun's surface telescope theory tides tion transit units usually varies Venus visible whole zenith
Popular passages
Page 266 - Thus he proposed his law of universal gravitation, which we can state as follows: Every particle in the universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them.
Page 265 - Us foci (§311). (2) The radius vector of each planet describes equal areas in equal times. (3) The squares of the periods of the planets are proportional to the cubes of their mean distances from the sun ; that is, ti2 : k2 ,• ,• ai3 ,• (h3This is the so-called harmonic law.
Page 399 - Direct your telescope to a point on the ecliptic in the constellation of Aquarius, in longitude 326°, and you will find within a degree of that place a new planet, looking like a star of about the ninth magnitude, and having a perceptible disc.
Page 15 - ... is the great circle in which the plane of the earth's equator cuts the celestial sphere. It is often called the
Page 150 - There are three different kinds of year used, the sidereal, the tropical, and the anomalistic. The sidereal year is the time taken by the earth to complete one revolution around the sun from a given star to the same star again. Its length is 365 days, 6 hours, 9 minutes, and 9 seconds. The tropical year is the time included between two successive passages of the vernal equinox by the sun, and since the equinox moves westward 50.
Page 100 - Effect on the Time of Sunrise and Sunset. The horizontal refraction, ranging as it does from 34' to 39', according to temperature, is always somewhat greater than the diameter of either the sun or the moon. At the moment, therefore, when the sun's lower limb appears to be just rising, the whole disc is really below the plane of the horizon; and the time of sunrise in our latitudes is thus accelerated from two to four minutes, according to the inclination of the sun's diurnal circle to the horizon,...
Page 161 - This path turns out to be (very nearly) a great circle, inclined to the ecliptic at an angle of about 5° 8'.
Page 169 - Then again when the moon is rising we look over its upper, which is then its western edge, seeing a little more of that part of the moon than if we were observing it from the centre of the earth.
Page 161 - When the ascending node of the moon's orbit coincides with the vernal equinox, the angle between the moon's path and the celestial § 1*2] INTERVAL BETWEEN MOON'S TRANSITS. 91 equator is 23° 28...
Page 265 - The radius vector of each planet describes equal areas in equal times. (3) The squares of the periods of the planets are proportional to the cubes of their mean distances from the sun; ie, tj2 : t£ : : ai8 : a23. This is the so-called "Harmonic Law.