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Keywords: Moon, lunation, phase
![Непрерывное извержение на спутнике Юпитера ИО](https://images.astronet.ru/pubd/2001/03/15/0001166627/Iolava_galileo_big.preview.jpg)
6.06.2000
A volcano on Jupiter's moon Io has been photographed recently during an ongoing eruption. Hot glowing lava is visible on the left on this representative-color image. A glowing landscape of plateaus and valleys covered in sulfur and silicate rock surrounds the active volcano.
![Луна, планеты, след ракеты](https://images.astronet.ru/pubd/2006/11/14/0001217830/rockettrails_orman99.preview.jpg)
14.07.1999
Are you an early riser? Over the last month or so, the bright planets Jupiter and Saturn have come to adorn eastern skies before sunrise. In fact, astrophotographer Joe Orman anticipated that an early...
![Миранда, Шеврон, Алонсо](https://images.astronet.ru/pubd/2005/07/19/0001207307/miranda_vg2mos1_full.preview.jpg)
6.03.1999
Miranda is a bizarre world which surely had a tempestuous past. The innermost of the larger Uranian moons, Miranda is almost 300 miles in diameter and was discovered in 1948 by American planetary astronomer Gerard Kuiper.
![Гамлет и Оберон](https://images.astronet.ru/pubd/2005/07/16/0001207267/oberon2_usgs_big.preview.gif)
27.02.1999
What's in a name? Since 1919, the International Astronomical Union has been charged with the task of establishing "conventional" nomenclature for planets, satellites, and surface features. For the remote Uranian system of moons, namesakes from Shakespearean works have been chosen.
![Энцелад: снимок крупным планом](https://images.astronet.ru/pubd/2005/03/17/0001204856/enceladus_cassini_03_c77.preview.jpg)
17.03.2005
The surface of Enceladus is as white as fresh snow. Still, an impressive variety of terrain is revealed in this contrast enhanced image. At a resolution of about 30 meters per pixel, the close-up view spans over 20 kilometers - recorded during the touring Cassini spacecraft's March flyby of the icy Saturnian moon.
!["Волнистый" спутник в кольцах Сатурна](https://images.astronet.ru/pubd/2005/05/23/0001205877/wavemaker_cassini.preview.jpg)
23.05.2005
What causes small waves in Saturn's rings? Observations of rings bordering the Keeler gap in Saturn's rings showed unusual waves. Such waves were first noticed last July and are shown above in clear detail.
![Спутники Плутона?](https://images.astronet.ru/pubd/2005/11/03/0001209208/plutoMoons_hst_f.preview.jpg)
3.11.2005
In 1930, tiny, icy world Pluto was discovered orbiting in the distant solar system. In 1978, its relatively large companion Charon was detected by ground-based observations. This year, the Hubble Space Telescope may well have detected two further members of the Pluto system.
![Таинственный темный спутник Урана Умбриэль](https://images.astronet.ru/pubd/2002/08/24/0001179267/umbriel_vg2_big.preview.gif)
7.04.1996
Why is Umbriel so dark? This dark moon reflects only half the light of other Uranus' moons such as Ariel. And what is that bright ring at the top? Unfortunately, nobody yet knows. These questions presented themselves when Voyager 2 passed this satellite of Uranus in January 1986.
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