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Astronomy Picture Of the Day (APOD)
![Размеры частиц в кольцах Сатурна](http://images.astronet.ru/pubd/2005/05/25/0001205907/radiosaturn_cassini.preview.jpg)
25.05.2005
What size particles compose Saturn's rings? To help find out, the robot Cassini spacecraft now orbiting Saturn broadcast radio waves of three different wavelengths right through the rings to Earth earlier this month.
![Вихри и звезды в IC 4678](http://images.astronet.ru/pubd/2005/05/24/0001205893/ic4678_siarkiewiczs.preview.jpg)
24.05.2005
Swirls of gas and dust enrich this little observed starfield toward the constellation of Sagittarius. Just to the side of the more often photographed Lagoon Nebula (M8) and the Trifid Nebula (M20) lies this busy patch of sky dubbed IC 4678.
!["Волнистый" спутник в кольцах Сатурна](http://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.
![Пылевой и ионный хвосты кометы Хейла-Боппа](http://images.astronet.ru/pubd/2005/05/23/0001205875/halebopp_gleason.preview.jpg)
22.05.2005
In 1997, Comet Hale-Bopp's intrinsic brightness exceeded any comet since 1811. Since it peaked on the other side of the Earth's orbit, however, the comet appeared only brighter than any comet in two decades. Visible above are the two tails shed by Comet Hale-Bopp.
![Змея в темноте](http://images.astronet.ru/pubd/2005/05/23/0001205876/b72neb_stevens_c1.preview.jpg)
21.05.2005
Dark nebulae snake across a gorgeous expanse of stars in this wide-field view toward the pronounceable constellation Ophiucus and the center of our Milky Way Galaxy. In fact, the central S-shape seen here is well known as the Snake Nebula.
![Северное сияние в Айове](http://images.astronet.ru/pubd/2005/05/20/0001205851/aurora_051505_richard_c90.preview.jpg)
20.05.2005
Early last Sunday morning stars were not the only lights in Iowa skies. The northern lights also shone from the heavens, extending across the midwestern USA and other locations not often graced with auroral displays.
![Рентгеновские звезды в туманности Ориона](http://images.astronet.ru/pubd/2005/05/19/0001205846/orion_cxo_fc.preview.jpg)
19.05.2005
When our middle-aged Sun was just a few million years old it was thousands of times brighter in x-rays. In fact, it was likely similar to some of the stars found in this false-color x-ray composite of the Orion Nebula region from the Chandra Observatory.
![На высоте три километра над Титаном](http://images.astronet.ru/pubd/2005/05/18/0001205829/titan_huygens.preview.jpg)
18.05.2005
What did the Huygens probe see as it descended toward Saturn's Moon Titan? In January the robot Cassini spacecraft now orbiting Saturn released a probe through the dense cloud decks of one of the Solar System's most mysterious moons.
![Панорама Марса с высоты Larry's Lookout](http://images.astronet.ru/pubd/2005/05/17/0001205817/larryslookout_spirit.preview.jpg)
17.05.2005
Scroll right to see a breathtaking panorama of Mars from Larry's Lookout. The lookout occurs near the peak of Husband Hill in the Columbia Hills. The summit of Husband Hill is visible 200 meters in the distance toward the center of the 360-degree near-true-color picture.
![Космический аппарат Deep Impact летит навстречу комете](http://images.astronet.ru/pubd/2005/05/16/0001205813/art1_deepimpact.preview.jpg)
16.05.2005
What happens when you crash into a comet? That was a question considered by astronomers when they designed the Deep Impact mission, launched in January. This coming July 4, the Deep Impact spaceship will reach its target - Comet Tempel 1 -- and release an impactor over five times the mass of a person toward its surface.
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