Rambler's Top100Astronet    
  по текстам   по ключевым словам   в глоссарии   по сайтам   перевод   по каталогу
 

Southern Cross Star Colors
<< Yesterday 8.07.2004 Tomorrow >>
Southern Cross Star Colors
Credit & Copyright: Stefan Seip
Explanation: Fix your camera to a tripod, lock the shutter open, and you can easily record an image of star trails, the graceful concentric arcs traced by the stars as planet Earth rotates on its axis. Gradually change the focus of the camera lens during the exposure, and you could end up with a dramatic picture like this one where the out-of-focus portion of the trail shows off the star's color. In this case, the subject is one of the most famous constellations in the night sky, Crux, the Southern Cross. Gacrux or gamma Crucis is the bright red giant star only 88 light-years distant that forms the top of the Cross seen here near top center. Acrux, the hot blue star at the bottom of the Cross is about 320 light-years distant. Actually a binary star system, Acrux is the alpha star of the compact Southern Cross and lies along a line pointing from Gacrux to the South Celestial Pole, off the lower right edge of the picture. Adding a separate short exposure to the end of the step-focussed trails to better show the positions of the stars themselves, astronomer Stefan Seip recorded this remarkable image last May in the dark night skies above Namibia.

<<  Июль  >>
Пн Вт Ср Чт Пт Сб Вс
      1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31  
1995   1996   1997   1998
1999   2000   2001   2002
2003   2004   2005   2006
2007   2008   2009   2010
2011   2012   2013   2014
2015   2016   2017   2018
2019  
Январь
Февраль
Март
Апрель
Май
Июнь
Июль
Август
Сентябрь
Октябрь
Ноябрь
Декабрь
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Русский текст
Based on Astronomy Picture Of the Day
Публикации с ключевыми словами: Crux - Southern Cross - star trail - Южный Крест - следы звезд
Публикации со словами: Crux - Southern Cross - star trail - Южный Крест - следы звезд
См. также:
Все публикации на ту же тему >>

Оценка: 3.6 [голосов: 78]
 
О рейтинге
Версия для печати Распечатать

Астронет | Научная сеть | ГАИШ МГУ | Поиск по МГУ | О проекте | Авторам

Комментарии, вопросы? Пишите: info@astronet.ru или сюда

Rambler's Top100 Яндекс цитирования