المستندات والموارد - نتائج البحث
نتائج البحث
Jupiter, Io and its shadow, by Ralf Burkart, Germany
فيديو
أُنشئ لصالح OAE
الشرح: First place in the 2021 IAU OAE Astrophotography Contest, category Galilean moons.
This time-lapse of Jupiter taken in 2017 from Germany beautifully illustrates the transit of one of the Galilean moons, Io, in front of Jupiter. As this is simply a moon casting a shadow on a planet it is equivalent to a lunar eclipse on Earth observed from further away. While the shadow of the moon is clearly visible from the beginning, it might be difficult to spot the moon itself against the background of the beautiful atmospheric bands of Jupiter the first time the video is seen. Watching it repeatedly allows appreciating the rapid motion and rotation in this fantastic observation.
المصدر: Ralf Burkart/IAU OAE
مصطلحات المعجم:
أقمار غاليليو , عملاق غازي , آيو , المشتري , الأقمار , المدار , الكواكب الخارجية , الكوكب , العبور
فئات:
النظام الشمسي
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 ( فيديو 12.64 MB)
Jupiter Moons Movie2, by Nicolas Hurez, Paul-Antoine Matrangolo, and Carl Pennypacker, United States of America
فيديو
أُنشئ لصالح OAE
الشرح: Second place in the 2021 IAU OAE Astrophotography Contest, category Galilean moons.
This sequence shows the orbit of the four Galilean moons around the planet Jupiter. Almost two entire orbits of the innermost moon, Io, can be seen, with the other moons (Europa and Ganymede, but in particular Callisto) being further away, orbiting noticeably slower. The images were obtained in 2018 with the Las Cumbres Global Observatory at different locations on Earth, allowing a continuous sequence of images over approximately half a week without gaps during the day. With clear skies and over the course of several nights, the motion of the Galilean moons can also be observed with binoculars (ideally steady your elbows on a surface).
المصدر: Nicolas Hurez, Paul-Antoine Matrangolo and Carl Pennypacker/IAU OAE
مصطلحات المعجم:
أقمار غاليليو , عملاق غازي , آيو , المشتري , الأقمار , المدار , الكواكب الخارجية , الكوكب
فئات:
النظام الشمسي
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 ( فيديو 890.47 kB)
Detailed View of Charon, Moon of Pluto
صورة
الشرح: Charon is the largest natural moon of the dwarf planet Pluto. This detailed image was taken by NASA’s New Horizons spacecraft in 2015 during its historic mission through the outer Solar System. Charon’s surface shows a fascinating mix of light and dark regions, including vast canyons, broad plains, and impact crater. With a diameter of about 1,200 kilometers, Charon is more than half the diameter of Pluto, making it unusually large compared to its parent body. Charon's mass is roughly 12% of that of Pluto.
Because Pluto and Charon are so close in mass, the center of mass of the system (the point both Pluto and Charon orbit) is not within Pluto but between Pluto and Charon. This is in contrast to systems like the Earth and its Moon where the center of mass lies within the larger body, the Earth in this case. Scientists think the Pluto-Charon system may have formed by a collision of two objects that then separated and began to orbit each other. By studying Charon and the smaller moons that circle Pluto, astronomers gain insight into how moons form and how distant icy bodies evolve over billions of years.
المصدر: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker
رابط المصدر
مصطلحات المعجم:
الأقمار , بلوتو
الترخيص: الملكية العامة الملكية العامة أيقونات
ملف
( صورة
2.88 MB)
Transit of Phobos from Mars
فيديو
الشرح: This video shows the Sun viewed from Mars as Mars’ moon Phobos transits across the solar disk. This video is composed of images taken from the Martian surface on the 30th of September 2024 by the Mastcam-Z camera of NASA’s Perseverance Mars rover. While our Moon is perfectly sized to eclipse the Sun when seen from the Earth’s surface, Phobos’s size and orbit mean that it cannot cover the solar disk completely. This means that this event is a transit and not an eclipse.
This video is in real time, with the entire transit lasting just 32 seconds. This compares with the several hours a solar eclipse on Earth takes from the Moon first obscuring part of the Sun to the Sun being completely visible again. This is due to Phobos’ much shorter orbital period of just over seven and a half hours compared to the Moon’s orbital period of 27 days as well as the solar disk appearing slightly smaller from Mars than it does from Earth. Note the non-spherical shape of Phobos as it crosses the solar disk.
المصدر: NASA/JPL-Caltech/ASU/MSSS
رابط المصدر
مصطلحات المعجم:
المريخ , الأقمار , الكسوف الشمسي , العبور
فئات:
النظام الشمسي
الترخيص: الملكية العامة الملكية العامة أيقونات
ملف
( فيديو
111.64 kB)
