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Astronomy Picture Of the Day (APOD)
![Галактика Местной группы NGC 6822](http://images.astronet.ru/pubd/2002/01/23/0001174416/ngc6822_noao.preview.jpg)
23.01.2002
Nearby galaxy NGC 6822 is irregular in several ways. First, the galaxy's star distribution merits a formal classification of dwarf irregular, and from our vantage-point the small galaxy appears nearly rectangular. What strikes...
![Квантовая гравитация обнаружена на Земле?](http://images.astronet.ru/pubd/2002/01/23/0001174425/quantumgravity_npac.preview.jpg)
22.01.2002
Does gravity come in chucks? A theory known as Quantum Mechanics tells us about how the universe works on the smallest scales, while Einstein's General Theory of Relativity tells us about how gravity and the universe works on the largest scales. So far, no complete theory has been able to encompass them both.
![Вулкан и северное сияние в Исландии](http://images.astronet.ru/pubd/2002/01/21/0001174400/volcanoaurora2_shs.preview.jpg)
21.01.2002
Sometimes both heaven and Earth erupt. In Iceland in 1991, the volcano Hekla erupted at the same time that auroras were visible overhead. Hekla, one of the most famous volcanoes in the world, has erupted at least 20 times over the past millennium, sometimes causing great destruction.
![Полноликая Каллисто](http://images.astronet.ru/pubd/2002/01/20/0001174387/callisto3_gal.preview.jpg)
20.01.2002
Callisto's surface shows its age. While probably formed at the same time as Io, the difference between the surfaces of these two moons of Jupiter could hardly be greater. Io's surface is young, shows practically no impact craters, and is continually being repaved by the lava exploding from its many large volcanoes
![Звезды без галактик](http://images.astronet.ru/pubd/2002/01/30/0001174565/vcstars_illust.preview.jpg)
19.01.2002
Galaxies are made up of stars, but are all stars found within galaxies? Using the Hubble Space Telescope, researchers exploring the Virgo Cluster of galaxies have found about 600 red giant stars adrift in intergalactic space. Above is an artist's vision of the sky from a hypothetical planet of such a lonely sun.
![Сатурн и Веста в Тельце](http://images.astronet.ru/pubd/2002/03/12/0001175236/taurus_orman_c1.preview.jpg)
18.01.2002
Last November, while skygazing toward the constellation Taurus, astrophotographer Joe Orman arranged this time exposure to include the lovely Hyades and Pleiades star clusters in the field of his telephoto lens. A distance...
![Выбери галактику, любую галактику](http://images.astronet.ru/pubd/2002/01/17/0001174277/hercdeep_comp4.preview.jpg)
17.01.2002
Pick a galaxy, any galaxy. In the top panel you can choose from a myriad of distant galaxies revealed in a deep Hubble Space Telescope image of a narrow slice of the cosmos toward the constellation Hercules.
![Космические каверны в скоплении Abell 2597](http://images.astronet.ru/pubd/2002/01/17/0001174259/abell2597_cxc.preview.jpg)
16.01.2002
Typical of large galaxy clusters billions of light-years away, Abell 2597 features hundreds of galaxies embedded in a cloud of multimillion degree gas which glows in x-rays. This Chandra Observatory x-ray image shows...
![Красная корона северного сияния](http://images.astronet.ru/pubd/2002/01/16/0001174225/aurora_clausen_big.preview.jpg)
15.01.2002
Few auroras show this level of detail. This unusual display of an auroral corona occurred on Earth three days after an unusual solar event -- the fifth most powerful explosion yet recorded on the Sun. An X14-class solar flare on April 15 sent a tremendous Coronal Mass Ejection (CME) into the Solar System.
![Ореол вокруг Солнца во время Зимнего солнцестояния](http://images.astronet.ru/pubd/2010/03/06/0001239421/solsticehalo_appleton_big.preview.jpg)
14.01.2002
Sometimes it looks like the Sun is being viewed through a large lens. In the above case, however, there are actually millions of lenses: ice crystals. As water freezes in the upper atmosphere, small, flat, six-sided, ice crystals might be formed.
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