Glossarbegriffe: Himmelsäquator
Description: Der Himmelsäquator ist definiert als der Großkreis (d.h. der größtmögliche Kreis auf der Oberfläche einer Kugel) der Himmelskugel. Seine Ebene liegt senkrecht zur Rotationsachse der Erde. Im Grunde genommen erhält man den Himmelsäquator, wenn man den Erdäquator auf die Himmelskugel projiziert.
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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".
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In Other Languages
- Arabisch: خط الاستواء السماوي
- Bengali: মহাকাশীয় বিষুবরেখা
- Englisch: Celestial Equator
- Spanisch: Ecuador celeste
- Französisch: Équateur céleste
- Ungarisch: Égi Egyenlítő
- Indonesisch: Khatulistiwa Langit
- Italienisch: Equatore celeste
- Japanisch: 天の赤道 (external link)
- Koreanisch: 천구적도
- Vereinfachtes Chinesisch: 天赤道
- Traditionelles Chinesisch: 天赤道
Related Diagrams
Ophiuchus Constellation Map
Bildunterschriften: The constellation Ophiuchus along with its bright stars and its surrounding constellations. Ophiuchus is surrounded by (going clockwise from the top): Hercules, Serpens Caput, Scorpius, Sagittarius and Serpens Cauda. Ophiuchus is not part of the traditional twelve zodiac constellations but it lies on the ecliptic (shown here as a blue line), this is the path the Sun appears to take across the sky over the course of a year. The Sun is in Ophiuchus from late November to mid December. The other planets of the Solar System can often be found in Ophiuchus.
Ophiuchus spans the celestial equator and thus part of the constellation is visible across the whole of the earth at some point in the year. However during the time it is most visible in the evenings (the southern hemisphere winter and northern hemisphere summer) much of the arctic is in perpetual daylight making the stars in the constellation impossible to see. The whole constellation is visible from equatorial and temperate regions of both hemispheres.
As Ophiuchus lies close to the galactic center it contains many globular clusters such as M9, M10, M12, M14, M19, M62, and M107. These are marked as yellow circles with plus symbols superimposed.
The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the line marking the ecliptic, nor the lines joining the stars appear on the sky.
Bildnachweis: Adapted by the IAU Office of Astronomy for Education from the original by IAU/Sky & Telescope
License: CC-BY-4.0 Creative Commons Namensnennung 4.0 International (CC BY 4.0) icons
Großer Hund-Sternenkarte
Bildunterschriften: Das Sternbild Großer Hund mit seinen hellen Sternen und den umliegenden Sternbildern. Im Uhrzeigersinn von oben gehend ist der Große Hund umgeben von dem Einhorn, dem Hasen, der Taube und dem Hinterdeck Des Schiffes. Das Sternbild wird von Sirius dominiert, dem Stern, der am Nachthimmel am hellsten erscheint und alle anderen Sterne des Sternbilds weit überstrahlt.
Der Große Hund liegt knapp südlich des Himmelsäquators und ist von der gesamten südlichen Hemisphäre sowie von den äquatorialen und gemäßigten Regionen der nördlichen Hemisphäre aus sichtbar. Sirius ist von allen außer den arktischen Regionen aus sichtbar. Der Große Hund ist in den Abendstunden im Spätwinter auf der Nordhalbkugel und im Spätsommer auf der Südhalbkugel am besten sichtbar.
Die offenen Sternhaufen M41, NGC 2360 und NGC 2362 befinden sich in diesem Sternbild. Diese sind mit gelben Kreisen markiert.
Die y-Achse dieses Diagramms ist in Deklinationsgraden mit Norden nach oben und die x-Achse ist in Rektaszensionsstunden mit Osten nach links. Die Größe der hier markierten Sterne bezieht sich auf die scheinbare Helligkeit des Sterns. Je größer die Punkte, desto heller sind die Sterne die sie darstellen. Die griechischen Buchstaben kennzeichnen die hellsten Sterne des Sternbildes. Diese sind nach Helligkeit geordnet, wobei der hellste Stern mit Alpha, der zweithellste mit Beta usw. bezeichnet wird, obwohl diese Reihenfolge nicht immer genau eingehalten wird. Die gepunkteten Begrenzungslinien markieren die IAU-Grenzen der Sternbilder und die durchgezogenen grünen Linien markieren eine der üblichen Formen, die zur Darstellung der Sternbilder verwendet werden. Weder die Grenzen der Sternbilder noch die Linien, die die Sterne verbinden, sind am Himmel sichtbar.
Bildnachweis: Angepasst vom IAU Office of Astronomy for Education nach dem Original von IAU/Sky & Telescope
License: CC-BY-4.0 Creative Commons Namensnennung 4.0 International (CC BY 4.0) icons
Aquila Constellation Map
Bildunterschriften: The constellation Aquila with its bright stars and surrounding constellations. Aquila is surrounded by (going clockwise from the top): Sagitta, Hercules, Ophiuchus, Serpens Cauda, Scutum, Sagittarius, Capricornus, Aquarius and Delphinus. Aquila is most notable for its brightest star Altair. This forms one vertex of the prominent Summer Triangle asterism that is visible in northern hemisphere summer evenings.
Aquila spans the celestial equator and thus some part of it is visible from all of the Earth at some point in the year. It is most visible in the evenings in the late northern hemisphere summer and late southern hemisphere winter.
The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. The blue line in the lower right of the diagram is the ecliptic. Neither the constellation boundaries, nor the line marking the ecliptic, nor the lines joining the stars appear on the sky.
Bildnachweis: Adapted by the IAU Office of Astronomy for Education from the original by IAU/Sky & Telescope
License: CC-BY-4.0 Creative Commons Namensnennung 4.0 International (CC BY 4.0) icons
Canis Minor Constellation Map
Bildunterschriften: The constellation Canis Minor with its bright stars and surrounding constellations. Canis Minor is surrounded by (going clockwise from the top): Gemini, Monoceros, Hydra and Cancer. Canis Minor has relatively few bright stars but its brightest star Procyon is the eight brightest star in the sky.
Canis Minor spans the celestial equator and thus part of the constellation is visible from the whole Earth at some point during the year. The whole constellation is visible to all but the most arctic and antarctic regions.
The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. The blue line in the top right of the diagram marks the ecliptic. Neither the constellation boundaries, nor the line marking the ecliptic, nor the lines joining the stars appear on the sky.
Bildnachweis: Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope
License: CC-BY-4.0 Creative Commons Namensnennung 4.0 International (CC BY 4.0) icons
Delphinus Constellation Map
Bildunterschriften: The constellation Delphinus with its brighter stars and surrounding constellations. Delphinus is surrounded by (going clockwise from the top): Vulpecula, Sagitta, Aquila, Aquarius, Equuleus and Pegasus. Delphinus is a relatively small constellation with few bright stars.
Delphinus lies just north of the celestial equator and thus the whole constellation is visible at some point in the year to all but the most antarctic regions. The constellation is best viewed in the evenings in the early northern hemisphere autumn and early southern hemisphere spring.
The globular cluster NGC 6934 lies in Dephinus. It is marked here with a yellow circle with a plus sign superimposed on it.
The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the lines joining the stars appear on the sky.
Bildnachweis: Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope
License: CC-BY-4.0 Creative Commons Namensnennung 4.0 International (CC BY 4.0) icons
