المستندات والموارد - نتائج البحث
نتائج البحث
Equal Day 2025 poster
صورة
الشرح: The poster for Equal Day 2025
المصدر: OAE Center Italy/NAEC Lebanon
ملف ( صورة 1.63 MB)
Solstices and Equinox
صورة
أُنشئ لصالح OAE
الشرح: Honorable mention in the 2023 IAU OAE Astrophotography Contest, category of Still images of day arcs of the Sun and Solargraphs.
This captivating image showcases the journey of the Sun through the sky during the winter solstice (bottom), equinox (middle), and summer solstice (top) in Bursa, Turkey, between 21 December 2007 and 20 June 2008. Using a fisheye lens, the photographer captured the Sun's positions at regular intervals from sunrise to sunset on the three different days, illustrating the changing lengths of day and night throughout the year. The variations in the Sun’s daily path across the sky, its height at midday, and the positions of sunrise and sunset, as well as the length of a day, depend on Earth’s axial tilt relative to its orbit around the Sun. The series was taken from a rooftop in Bursa, where the local terrain adds its own unique touch by occasionally obstructing the horizon. Oriented with north at the top and south at the bottom, this visual diary serves as a stunning representation of the Sun’s path for those residing in mid-northern latitudes.
المصدر: Tunç Tezel/IAU OAE (CC BY 4.0)
مصطلحات المعجم:
الاعتدال , الانقلاب الشمسي , الانقلاب الصيفي , مسار الشمس (قوس النهار) , الانقلاب الشتوي
فئات:
علم الفلك بالعين المجردة
وسوم:
astrophotography
الترخيص: المشاع الإبداعي نَسب المُصنَّف 4.0 دولي (CC BY 4.0) المشاع الإبداعي نَسب المُصنَّف 4.0 دولي (CC BY 4.0) أيقونات
هذا الملف على Zenodo ( صورة 1.71 MB)
Equal Day - March 2025 in Angelochori, Greece
صورة
الشرح: Kids at school in Angelochori (Macedonia, Greece) playing the star with the Solar system during the 2025 Equal Day.
H-alpha image of the Sun's chromosphere
صورة
الشرح: This false-color image was captured with a 10-cm telescope at the Big Bear Solar Observatory (BBSO) in the United States in July 2002. It depicts the full disk of the Sun using the H-alpha emission line of hydrogen. When observed in this spectral line, the Sun's chromosphere appears particularly prominent due to hydrogen atoms emitting light at the specific wavelength. This emission produces a distinctive red color, making features such as spicules (jets of plasma that look hair-like) and plage (bright patches in the chromosphere) highly visible. Several small solar prominences can be seen protruding from the edge of the solar disk. When prominences (also known as filaments) cross the face of the disk they appear as dark threads caused by the cooler material in the prominence absorbing light. The chromosphere is also visible in the violet part of the solar spectrum due to ionized calcium showing emissions in these wavelengths.
المصدر: Big Bear Solar Observatory (BBSO)/New Jersey Institut of Technology (NJIT)
رابط المصدر
مصطلحات المعجم:
الطبقة اللونية , الشواظ الشمسي , الشمس , الخط الطيفي
فئات:
الشمس
الترخيص: الملكية العامة الملكية العامة أيقونات
ملف
( صورة
2.82 MB)
Where the Sun Sets Every Month
صورة
أُنشئ لصالح OAE
الشرح: Third place winner in the 2023 IAU OAE Astrophotography Contest, category of Still images of sunrise and sunset location over the year.
Taken with a smartphone from San Rafael, Bulacan, Philippines, this series of images capture the changing position of sunset over the year owing to Earth’s axial tilt and orbit around the Sun. From January to December 2022, each image reflects the changing backdrop and position of the Sun at dusk. Observe the changing foliage and the appearance of an electricity pole in October. This collection serves as a visual testament to the celestial dance between Earth and the Sun, and the natural transformations on the ground.
المصدر: John Paul Pile/IAU OAE (CC BY 4.0)
مصطلحات المعجم:
الاعتدال , الانقلاب الشمسي , الانقلاب الصيفي , مسار الشمس (قوس النهار) , الانقلاب الشتوي
فئات:
علم الفلك بالعين المجردة
وسوم:
astrophotography
الترخيص: المشاع الإبداعي نَسب المُصنَّف 4.0 دولي (CC BY 4.0) المشاع الإبداعي نَسب المُصنَّف 4.0 دولي (CC BY 4.0) أيقونات
هذا الملف على Zenodo ( صورة 11.82 MB)
