< Page:Gods Glory in the Heavens.djvu
This page has been proofread, but needs to be validated.

SYNOPTICAL TABLES.

359

Probable average distance of stars of 6th magnitude, 120
Nebulæ, proportion of sphere containing one-third of whole mass, near north pole of the galaxy, 1-8th
Largest proper motion, 1830, Groombridge, 7″
Diameter of the Sun removed to a distance corresponding to one-second parallax, 0″.0093
Light of Sirius (Sun's = 1 at the same distance), 63
Light of the Sun (Sirius = 1) at the Earth, 20,000,000,000
Variable star Algole, period, 2d 20h 48m
Variable star Algole,— — — variation in magnitude, 2.4
Variable star— — — δ Cephei, period, 5d 8h 47m
Variable star δ Cephei,— — — variation in magnitude, 3.5
Variable star— — — β Lyræ., period, 12d 23h 53m
Variable star, β Lyræ.— — — variation in magnitude, 3.4
Number of variable stars, with assigned periods, about 6O
Double stars, odds against one chance combination of 4″ closeness, 9570 to 1
Double stars,— — — number of such combinations, upwards of 100
Sun's distance from Alcyone, the centre of the stellar system (Mædlar), (radius of Earth's orbit = 1), 34,000,000
Sun's— — — time of revolution round Alcyone, in years, 19,256,000
Sun's— — — velocity in space (Earth's annual motion = 1), 1.4
Sun, point in Hercules, to which it is moving,
Sun, point in Hercules, north declination,— — — 34° 37′
Sun, point in Hercules, right ascension,— — — 259°'90

TELESCOPE.
Lord Rosse's Great Reflector, diameter of mirror, in feet, 6
Lord Rosse's Great Reflector,— — — thickness of mirror, in inches, 5
This article is issued from Wikisource. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.