It's one of the possible lines that join the north and south poles and cross territory in
Norway, Sweden, Denmark, Poland, Germany, the Czech Republic, Austria, Slovenia,
Croatia, Italy's mainland, Sicily, Libya, Niger, Chad, Cameroon, Central African Republic,
Congo, Democratic Republic of the Congo, Angola, Namibia, and Antarctica, as well as
several rivers, lakes, and oceans.
Local mean time at 72 degrees west longitude is UTC-4:48.
If it's noon solar time at 90 degrees W longitude, every 15 degrees of longitude represents a one-hour time difference. So, at 72 degrees W longitude, the solar time would be 2 hours behind (2:00 PM).
The time difference between the local time and Greenwich Mean Time (GMT) is 2 hours. Since there are 360 degrees of longitude in a full circle and 24 hours in a day, each hour of time difference corresponds to 15 degrees of longitude. Therefore, the longitude of the town would be 30 degrees west of the Prime Meridian (Greenwich).
The Earth rotates at the rate of roughly 15 degrees of longitude per hour.
A polar view of the planet is roughly circular, that is, a total 360 degrees. There are about 24 hours in each day. Divide 360 by 24; the answer is 15, so there are 15 degrees of longitude in each time zone.
Local mean time at 72 degrees west longitude is UTC-4:48.
If it's noon solar time at 90 degrees W longitude, every 15 degrees of longitude represents a one-hour time difference. So, at 72 degrees W longitude, the solar time would be 2 hours behind (2:00 PM).
The time difference between the local time and Greenwich Mean Time (GMT) is 2 hours. Since there are 360 degrees of longitude in a full circle and 24 hours in a day, each hour of time difference corresponds to 15 degrees of longitude. Therefore, the longitude of the town would be 30 degrees west of the Prime Meridian (Greenwich).
The Prime Meridien (0 degrees longitude) passes through the London Borough of Greenwich - hence GMT (Greenwich Mean Time).
time
There are 24 time zones. The Earth is 360 degrees around the circumference. So, for every 15 degrees of longitude there is one time zone.
The Earth rotates at the rate of roughly 15 degrees of longitude per hour.
A polar view of the planet is roughly circular, that is, a total 360 degrees. There are about 24 hours in each day. Divide 360 by 24; the answer is 15, so there are 15 degrees of longitude in each time zone.
GMT (Greenwich Mean Time). 0 degrees Longitude runs through Greenwich, a suburb of southeast London.
0 degrees longitude
England's Royal Observatory in Greenwich (the source of Greenwich Mean Time - GMT) is 0 degrees longitude and the reference point. 120 degrees East is the longitude of the east coast of Taiwan. At that longitude, 1/3 of a circumference from Greenwich, the standard time (and date) should be 8 hours ahead of Greenwich. So if it is 4am in Greenwich, it should be noon in Taiwan.
Greenwich. That's where the term GMT (Greenwich Mean Time) comes from.