Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astronet.ru/db/varstars/msg/1159998
Дата изменения: Mon Aug 26 18:00:40 2002
Дата индексирования: Sat Feb 12 18:20:33 2011
Кодировка:
Journal "Peremennye Zvezdy"
Peremennye Zvezdy

The Iron Sun
<< Yesterday 21.05.1996 Tomorrow >>
The Iron Sun
Credit & Copyright: EIT Consortium, SOHO project, ESA, NASA
Explanation: The ultraviolet light emitted by eleven times ionized iron at temperatures over 2 million degrees Farenheit was used to record the above picture of the Sun on May 16. The image was made by the EIT camera onboard the SOHO spacecraft, a space observatory which can continuously observe the Sun. Eleven times ionized iron is atomic iron with eleven of its electrons stripped away. Here the electrons are stripped by the frantic collisions with other atoms and electrons which occur at the extreme temperatures in the Solar Corona. Since electrons are negatively charged, the resulting ionized iron atom is highly positively charged. Astronomer's "shorthand" for eleven times ionized iron is written "Fe XII", the chemical symbol for iron followed by a Roman numeral 12 (Fe I is neutral iron).

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.

Based on Astronomy Picture Of the Day

Main Page | Search
Astronet | SAI | INASAN

Report problems