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Astronomy Picture Of the Day (APOD)
![Юпитер и его семья](http://images.astronet.ru/pubd/2003/08/15/0001192361/jupfam1_galvg_big.preview.jpg)
29.09.1997
This composite image features classic portraits of members of one of the Solar System's most prominent families - Jupiter and its four large "Galilean" moons. Starting from the top the moons are Io, Europa, Ganymede, and Callisto. The top-to-bottom order is also the order of increasing distance from Jupiter.
![Пузырь, выдутый звездой Вольфа-Райе](http://images.astronet.ru/pubd/2003/08/15/0001192360/ngc2359_aat.preview.gif)
28.09.1997
What's a Wolf-Rayet star, and how did it create that spherical bubble and sweeping arc? A Wolf-Rayet star is a star that originated with a mass over 40 times that of our Sun.
![Плоскость эклиптики](http://images.astronet.ru/pubd/2005/10/15/0001208737/ecliptic_clem_big.preview.gif)
27.09.1997
The Plane of the Ecliptic is illustrated in this Clementine star tracker camera image which reveals (from right to left) the Moon lit by Earthshine, the Sun's corona rising over the Moon's dark limb, and the planets Saturn, Mars, and Mercury.
![Одинокая нейтронная звезда](http://images.astronet.ru/pubd/2003/08/15/0001192358/nslonely_hst_big.preview.jpg)
26.09.1997
How massive can a star get without imploding into a black hole? These limits are being tested by the discovery of a lone neutron star in space. Observations by the Hubble Space Telescope released...
![T Компаса: повторная новая](http://images.astronet.ru/pubd/2003/08/15/0001192357/tpyx_hst_big.preview.jpg)
25.09.1997
What happens when a thermonuclear blast occurs on the surface of a white dwarf star? Over the years astronomers have watched (at a safe distance ...) as, 6,000 light years from Earth in the southern constellation Pyxis, a binary star known as T Pyxidis repeatedly produces these fearsome explosions.
![Покрытие Сатурна Луной](http://images.astronet.ru/pubd/2003/08/15/0001192356/ocsat_anim.preview.gif)
24.09.1997
Many stargazers in the U. S. were able to watch a lovely lunar occultation early last Thursday morning as a bright Moon passed in front of Saturn. Using a 1.2 meter reflector, astronomer Kris Stanek had an excellent view of this dream-like event from the Whipple Observatory atop Arizona's Mount Hopkins.
![Начало марсианской осени](http://images.astronet.ru/pubd/2003/08/15/0001192355/mars1_hst_big.preview.jpg)
23.09.1997
Today is the first day of Autumn in the Northern Hemisphere of Planet Earth. The Autumnal Equinox occured yesterday at 7:56 pm EDT as the Sun crossed the celestial equator from North to South.
![Антарес и Ро Змееносца](http://images.astronet.ru/pubd/2003/10/27/0001194484/antrho_aat.preview.jpg)
22.09.1997
Why is the sky near Antares and Rho Ophiuchi so colorful? The colors result from a mixture of objects and processes. Fine dust illuminated from the front by starlight produces blue reflection nebulae. Gaseous clouds whose atoms are excited by ultraviolet starlight produce reddish emission nebulae. Backlit dust clouds block starlight and so appear dark.
![Смотря на Сатурн сзади](http://images.astronet.ru/pubd/2003/08/15/0001192353/saturn_down_vg1.preview.gif)
21.09.1997
This picture of Saturn could not have been taken from Earth. No Earth based picture could possibly view the night side of Saturn and the corresponding shadow cast across Saturn's rings. Since Earth is much closer to the Sun than Saturn, only the day side of the planet is visible from the Earth.
![Облака на Юпитере](http://images.astronet.ru/pubd/2003/08/15/0001192352/jupclouds_vgr_big.preview.jpg)
20.09.1997
What makes the colors in Jupiter's clouds? With a mean temperature of 120 degrees Kelvin (-153 degrees Celsius) and a composition dominated by hydrogen (about 90%), and helium (about 10%) with a smattering...
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