Gravitational Force of the Sun

Gravitational Force of the Sun
Pari Spolter (Author)
(13)

New!: $29.95 (as of 03/15/2013 00:15 PST)
20 Used! | New! from $21.75 (as of 03/15/2013 00:15 PST)

Gravity

Description #1 by Zazzle:

The first true measurement of light-speed came in 1676 by a fellow named Olaf Roemer. He noted that the time elapsed between eclipses of Jupiter with its moons became shorter as the Earth moved closer to Jupiter and became longer as the Earth and Jupiter drew farther apart. This anomalous behavior could be accounted for by a finite speed of light. He calculated that the speed of light was something like 2.14 x 10^8 meters per second. This measurement, considering its antiquity, method of measurement, and 17th century uncertainty in exactly how far Jupiter was from the Earth, is surprisingly close to the modern value of 2.99792458 x 10^8 meters per second. These modern values are obtained using devices called laser interferometers, which can very precicely pin down speeds and distances.

Description #2 by Biblio.com:

Granada Hills CA: Orb Pub Co. Fine in Fine dust jacket. 1994. First Edition. Hardcover. 0963810758 . 0.9 x 9.3 x 6.2 Inches; 260 pages .

Description #3 by Zazzle:

Orbiting Flares was created from the colors of purple, blue and violet. This unique and beautiful design is of flares that have been pulled in to a gravitational pull around a sun.