This page describes an image International Date Line
Datei runterladen ( Bild 214.47 kB)
PDF Datei runterladen (PDF file 88.40 kB)
Also available in black and white
Datei runterladen ( Bild 272.39 kB)
PDF Datei runterladen (PDF file 88.60 kB)
Untertitel Diagramm:
The International Date Line (shown here as a solid line) is a specific meridian which roughly follows the meridian of longitude 180°. The International Date Line passes north–south between Russia and Alaska, through the Pacific Ocean including parts of Micronesia and Polynesia, and to the east of Australia/New Zealand before reaching the South Pole on Antarctica. The International Date Line marks the boundary where calendar dates change by one. Therefore, regions to the west of the International Date line are one calendar day ahead of regions to the east.
The International Date Line does not always exactly follow the meridian of longitude 180°. This is partly to stop some territory of a country falling on the other side of the International Date Line than the rest of that country (the Aleutian Islands in the United States being a good example). Some countries also choose which side of the International Date Line they lie on. Samoa changed which side of the date line it lay on in 2011. At this point the International Date Line was moved to lie to the east of Samoa having previously passed to the west of Samoa.
On the opposite side of the world the dashed line marks the prime meridian (the meridian of longitude 0°). This is a line that passes through the Royal Greenwich Observatory in the UK. All time zones are measure relative to Universal Time which is the zero point for all timezones. The time zones marked at the top of the diagram are the timezones in the shaded regions excluding the effects of daylight savings time.
Quelle Diagramm: Maria Cristina Fortuna/IAU OAE.
Diagramm Übersetzungsstatus: Noch nicht bestätigt von einem Rezensenten
Diagramm-Lizenz: Creative Commons Namensnennung 4.0 International (CC BY 4.0) Creative Commons Namensnennung 4.0 International (CC BY 4.0) Symbole
Ähnliche Glossarbegriffe:
Datumsgrenze
, Nullmeridian
, Universalzeit (UT)
, Zeitzone
Kategorien:
Astronomie und Gesellschaft
, Der Planet Erde
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The diagram captions presented on the OAE website were written, translated and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits for our translation project here. All media file captions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE". The media files themselves may have different licenses (see above) and should be credited as listed above under "credit".
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