Termine del Glossario Equatore
Descrizione L'equatore è una linea immaginaria che corre intorno alla Terra, equidistante dai poli nord e sud e perpendicolare all'asse di rotazione terrestre. L'equatore rappresenta la linea sulla superficie terrestre più lontana dall'asse di rotazione. Ai poli l'asse di rotazione si interseca con la superficie. Nel sistema di coordinate di latitudine e longitudine sulla superficie terrestre, l'equatore è definito come avente zero gradi di latitudine. L'equatore divide la Terra in un emisfero settentrionale e uno meridionale. I luoghi dell'emisfero settentrionale hanno una latitudine positiva, quelli dell'emisfero meridionale una latitudine negativa.
Termini correlati
Vedi questo termine in altre lingue
status del termine e della definizione La definizione originale di questo termine in inglese é stata approvata da un ricercatore astronomo e da un docente La traduzione di questo termine e della sua definizione sono state approvate da un ricercatore astronomo e da un docente
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written 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 here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
Se noti un errore di fatto o di traduzione in questo termine del glossario, per favore contattaci.
File multimediali correlati
Il Primo Meridiano
Didascalia: Il meridiano principale è definito come zero gradi di longitudine e va dal Polo Nord attraverso Greenwich a Londra fino al Polo Sud. È rappresentato come una linea rossa luminosa su questa mappa schematica della Terra. La linea orizzontale corrisponde all'equatore, mentre l'antimeridiano stesso forma i bordi esterni a 180 gradi a ovest e ad est.
Crediti: Utente Wikicommons Kmf164
link ai crediti
License: PD Dominio Pubblico icone
Diagrami correlati
Latitude and Longitude
Didascalia: Two views of the Earth, one viewing the Northern Hemisphere, one viewing the Southern Hemisphere. The Earth rotates around its axis, an imaginary line that runs through the Earth from the North Pole to the South Pole. The Equator is an imaginary line that is the same distant from both the North Pole and the South Pole.
The positions of two cities, Rome in the Northern Hemisphere and Sydney in the Southern Hemisphere are marked here with red dots. Arrows indicate the two spherical coordinates latitude and longitude.
Latitude marks the position north or south of the equator. Here we can see Rome has the letter N in its latitude as it is in the Northern Hemisphere and Sydney has the letter S in its latitude as it is in the Southern Hemisphere. Latitude can vary from 90° N at the North Pole to 0° at the Equator to 90° S at the South Pole.
Longitude measures the position around the equator. While the choice of the zero point for latitude as the equator seems obvious, the choice of the zero point for longitude is more subjective. By convention the zero point in longitude is the prime meridian which passes through the Royal Greenwich Observatory in the UK. This is marked here as a solid line originating at the North Pole. Longitude is measured in degrees east or west of the prime meridian. As both Rome and Sydney lie to the east of Greenwich, they have the letter E as part of their longitude. Moving west to east, longitude varies from 180° W on the other side of the world from the prime meridian to 0° on the prime meridian before reaching 180° E again on the other side of world from the prime meridian.
This diagram shows the Earth at the December solstice. Two views are presented, one viewing the Northern Hemisphere and one viewing the Southern Hemisphere about nine hours later. The shaded region shows the night side of the Earth, with the day side being lighter. As it is the December solstice, the Sun appears overhead at the Tropic of Capricorn. This is a line of constant latitude at 23°26′09.3″ S. Six months later, at the June solstice, the Sun will appear to be overhead at the Tropic of Cancer at 23°26′09.3″ N. As the Sun appears over the Tropic of Capricorn more of the Southern Hemisphere is illuminated than the Northern Hemisphere. Indeed below the Antarctic Circle (the Polar Circle around the South Pole) the Sun does not set at this time of year leading to a Polar Day. Conversely, north of the Arctic Circle (the Polar Circle around the North Pole) the Sun does not rise at this time of year, leading to a Polar Night.
Crediti: Maria Cristina Fortuna/IAU OAE
License: CC-BY-4.0 Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
Attività correlate
Seasons Around the World
astroEDU educational activity (links to astroEDU website) Description: Demonstrate the seasons on Earth using a model.
License: CC-BY-4.0 Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
Etichette:
Hands-on
, Model
Fasce d'età
6-8
, 8-10
, 10-12
Livello di istruzione
Middle School
, Primary
Aree di apprendimento
Modelling
, Social Research
Costi:
Medium Cost
Durata:
45 mins
Dimensione del Gruppo:
Group
Abilità:
Analysing and interpreting data
, Asking questions
, Constructing explanations
, Developing and using models
, Planning and carrying out investigations
The Intertropical Convergence Zone
astroEDU educational activity (links to astroEDU website) Description: The air circulation system: how are winds created?
License: CC-BY-4.0 Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
Etichette:
Climate
, Updraft
, Convection
, Winds
Fasce d'età
12-14
, 14-16
Livello di istruzione
Middle School
Aree di apprendimento
Discussion Groups
, Modelling
, Social Research
Costi:
Medium Cost
Durata:
1 hour
Dimensione del Gruppo:
Group
Abilità:
Communicating information
, Constructing explanations
, Developing and using models
, Engaging in argument from evidence
, Planning and carrying out investigations
The Quest for Longitude
astroEDU educational activity (links to astroEDU website) Description: How to navigate at sea like an explorer?
License: CC-BY-4.0 Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
Etichette:
Clocks
, Geography
, Coordinates
, Celestial navigation
, James Cook
, Exploration
Fasce d'età
14-16
, 16-19
Livello di istruzione
Middle School
, Secondary
Aree di apprendimento
Discussion Groups
, Modelling
, Social Research
Costi:
Low Cost
Durata:
2 hours
Dimensione del Gruppo:
Group
Abilità:
Analysing and interpreting data
, Asking questions
, Communicating information
, Developing and using models
, Planning and carrying out investigations
, Using mathematics and computational thinking
Navigating with the Kamal – Northern Hemisphere
astroEDU educational activity (links to astroEDU website) Description: How did Arabian sailors navigate at sea?
License: CC-BY-4.0 Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
Etichette:
History
, Geography
, Coordinates
, Celestial navigation
, Arabia
, Kamal
Fasce d'età
14-16
, 16-19
Livello di istruzione
Middle School
, Secondary
Aree di apprendimento
Modelling
, Social Research
Costi:
Low Cost
Durata:
1 hour 30 mins
Dimensione del Gruppo:
Group
Abilità:
Analysing and interpreting data
, Asking questions
, Communicating information
, Developing and using models
, Planning and carrying out investigations
Discover Earth's climate with a balloon
astroEDU educational activity (links to astroEDU website) Description: Discover the secrets of Earth's climate zones with a hands-on experience
License: CC-BY-4.0 Creative Commons Attribuzione 4.0 Internazionale (CC BY 4.0) icone
Fasce d'età
8-10
, 10-12
Livello di istruzione
Middle School
, Primary
Aree di apprendimento
Fun activity
, Guided-discovery learning
, Modelling
, Observation based
, Project-based learning
, Social Research
Costi:
Low Cost
Durata:
45 mins
Dimensione del Gruppo:
Group
Abilità:
Asking questions
, Constructing explanations
, Developing and using models
