Glossarbegriffe: Wassermann
Description: Wassermann (lateinisch Aquarius) ist ein vergleichsweise unauffälliges Sternbild des Tierkreises. Der Tierkreis ist der Teil des Himmels, der sich mit der Ekliptik (der Ebene, die durch die Bahn der Erde um die Sonne definiert ist) schneidet. Daher können wir von der Erde aus regelmäßig die Sonne und auch Planeten im Sternbild Wassermann finden. Im Falle der Sonne ist dies von Ende Februar bis Anfang März der Fall. Zu dieser Zeit können wir die Sterne des Sternbilds natürlich nicht sehen. Der Wassermann ist eines der 88 modernen Sternbilder, die von der Internationalen Astronomischen Union definiert wurden, geht aber viel weiter zurück. Er war bereits eines der 48 Sternbilder, die der Astronom Claudius Ptolemäus im 2. Jahrhundert beschrieben hat.
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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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Related Diagrams
Capricornus Constellation Map
Bildunterschriften: The constellation Capricornus (commonly called Capricorn) including its bright stars and surrounding constellations. Capricornus is surrounded by (going clockwise from the top) Aquarius, Aquila, Sagittarius, Microscopium and Piscis Austrinus. Capricornus 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 Capricornus from mid January to mid February. The other planets of the Solar System can often be found in Capricornus.
Capricornus lies just south of the celestial equator and is visible to all observers south of the Arctic Circle. Capricornus is most visible in the evenings in the northern hemisphere autumn and southern hemisphere spring.
In the south east (lower left on this diagram) of the constellation one can find the globular cluster M30 (shown here as 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 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
Wassermann-Sternbildkarte
Bildunterschriften: Das Sternbild Wassermann mit seinen hellen Sternen und den umliegenden Sternbildern. Der Wassermann ist im Uhrzeigersinn von oben aus gehend umgeben von Pegasus, Fohlen, Adler, Steinbock, Südlicher Fisch, Bildhauer, Walfisch und Fische. Wassermann liegt auf der Ekliptik (hier als blaue Linie dargestellt), das ist der Weg, den die Sonne im Laufe eines Jahres über den Himmel zu nehmen scheint. Die Sonne befindet sich von Mitte Februar bis Mitte März im Wassermann. Auch die anderen Planeten des Sonnensystems sind oft im Wassermann zu finden.
Der Wassermann erstreckt sich über den Himmelsäquator und ist daher im Laufe des Jahres irgendwann einmal von der gesamten Erde aus sichtbar. In den arktischen oder antarktischen Regionen der Welt sind einige Teile des Sternbilds möglicherweise nicht sichtbar. Wassermann ist am besten abends im Herbst auf der Nordhalbkugel und im Frühling auf der Südhalbkugel sichtbar.
Die gelben Kreise mit überlagerten Pluszeichen markieren die Kugelsternhaufen M2 und M72. Die grünen Kreise mit überlagerten Plussymbolen markieren die planetarischen Nebel NGC 7293 (der Helixnebel) und NGC 7002 (der Saturnnebel). M73 (markiert mit einem x-Symbol) ist eine zufällige Gruppierung von Sternen, die früher fälschlicherweise als offener Sternhaufen klassifiziert wurde.
Die y-Achse dieses Diagramms ist in Deklinationsgraden mit Norden nach oben und die x-Achse in Rektaszensionsstunden mit Osten nach links angegeben. Die Größe der hier markierten Sterne bezieht sich auf die scheinbare Helligkeit des Sterns. Je größer die Punkte, desto heller scheinen 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 Sternbildgrenzen, noch die Linie, die die Ekliptik markiert, noch die Linien, die die Sterne verbinden, erscheinen so am Himmel.
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
Pisces Constellation Map
Bildunterschriften: The constellation Pisces along with its bright stars and surrounding constellations. Pisces is surrounded by (going clockwise from the top) Andromeda, Pegasus, Aquarius, Cetus, Aries and Triangulum. Pisces 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 Pisces from mid March to mid April. Thus the Sun is in Pisces at the March equinox. At this point the ecliptic crosses the celestial equator. The Sun’s location at the spring equinox is used to set the zero point of the Right Ascension positional coordinate. The other planets of the Solar System can often be found in Pisces.
Pisces spans the celestial equator and is thus visible at some time in the year from all of planet Earth. In the most arctic or antarctic regions of the world, some parts of the constellation may not be visible. Pisces is most visible in the evenings in the northern hemisphere autumn and southern hemisphere spring
The grand design spiral galaxy M74 is marked on this diagram with a small red circle.
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
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
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
