Search results
Results from the WOW.Com Content Network
Magnetic declination varies both from place to place and with the passage of time. As a traveller cruises the east coast of the United States, for example, the declination varies from 16 degrees west in Maine, to 6 in Florida, to 0 degrees in Louisiana, to 4 degrees east in Texas.
In its orbit around the Earth, the Moon moves relative to the stars at a rate of just over 0.5°/hour. The angle between the limb of the Moon and a suitable star, planet, or sun is measured with a sextant , and, after consulting ephemeris tables, a value for the mean time at a reference meridian, usually Greenwich, can be calculated.
Jean Picard (21 July 1620 – 12 July 1682) was a French astronomer and priest born in La Flèche, where he studied at the Jesuit Collège Royal Henry-Le-Grand.. He is principally notable for his accurate measure of the size of the Earth, based on a careful survey of one degree of latitude along the Paris Meridian.
Meridian altitude is the simplest calculation of celestial navigation, in which an observer determines his latitude by measuring the altitude of an astronomical object at the time of its meridian contact.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Upgrade to a faster, more secure version of a supported browser. It's free and it only takes a few moments:
The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass.
If your savings account rate becomes the current national average (0.57 percent) because the Fed lowers rates, you could earn as little as $37.62 for the year and miss out on $160.38.