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شرح الرسم التوضيحي:
The zodiac constellation Gemini and its surrounding constellations. Starting from the top of the diagram and going clockwise, these are Auriga, Taurus, Lynx, Orion, Monoceros, Canis Minor and Cancer. The brightest stars in Gemini, Castor and Pollux appear in the upper lefthand corner (north-east) of the diagram. In Greek mythology, the stars in this constellation are thought to resemble twins with their arms wrapped around each other, with Castor and Pollux indicating their heads. Gemini 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 Gemini from late June to late July. The other planets of the Solar System can often be found in Gemini.
Gemini lies north of the celestial equator and is visible in all but the antarctic regions of the world. Gemini is most visible in the evenings in the northern hemisphere winter and southern hemisphere summer.
Just to the right of the foot of the Castor twin is an open cluster of stars (labelled as a yellow circle with a dotted line border), Messier 35, also known as the Shoe-Buckle Cluster. This cluster is spread out over an area roughly the size of the full moon. In addition to this cluster of stars, there is a planetary nebula (labelled as a green circle with four radial spikes) – NGC 2392 – near the celestial equator and just to the left of the Pollux twin. Two variable stars (Mekbuda and Propus; labelled as two concentric circles) can be found in the “legs” of each twin, but are so faint that an observer would need dark skies to see them.
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 labelled 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.
مصدر الرسم التوضيحي: Adapted by the IAU Office of Astronomy for Education from the original by IAU/Sky & Telescope. رابط المصدر
حالة ترجمة الرسم التوضيحي: لم تتم الموافقة من قبل مُراجع بعد
ترخيص الرسم التوضيحي: المشاع الإبداعي نَسب المُصنَّف 4.0 دولي (CC BY 4.0) المشاع الإبداعي نَسب المُصنَّف 4.0 دولي (CC BY 4.0) أيقونات
مصطلحات معجم ذات صلة:
الإحداثيات السماوية
, الجوزاء
, القدرالظاهري
, المطلع المستقيم
, الميل
, برج الثور
, دائرة البروج
, مجموعة نجمية او حشد نجمى
, مسار البروج
فئات:
علم الفلك بالعين المجردة
النص الأول (مترجم):هل ترغب في إنشاء ترجمتك الخاصة أو نسختك الخاصة من هذا المخطط؟ إذًا قم بتنزيل نسخة SVG من هذا المخطط باللغة الإنجليزية (545.10 kB).يمكنك تعديل هذه النسخة باستخدام برامج مثل Inkscape (مجاني) أو Adobe Illustrator (برنامج) مدفوع).رجى فقط التأكد من الإشارة إلى مؤلف النسخة الأصلية بشكل مناسب.)
النص الثاني (مترجم):يمكنك أيضاً إنشاء نسختك الخاصة أو ترجمتك الخاصة من هذا المخطط عن طريق إضافة النصوص إلى نسخة من المخطط بدون نص.ما عليك سوى تنزيل أحد الملفات التالية:
تنزيل ملف بدون نص( صورة 98.73 kB)
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