Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.sai.msu.su/apod/ap960522.html
Дата изменения: Unknown
Дата индексирования: Tue Oct 2 08:39:16 2012
Кодировка:
APOD: May 22, 1996 - Star Cluster in the Rosette Nebula

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

May 22, 1996
See Explanation.  Clicking on the picture will download 
 the highest resolution version available.
Star Cluster in the Rosette Nebula
Credit: P. Seitzer (U. Michigan), Curtis Schmidt Telescope, CTIO, Chile

Explanation: Embedded in the center of the colorful and photogenic Rosette Nebula is a bright, young open cluster. The bright blue stars in this cluster, labelled NGC 2244, emit ultraviolet light that knocks electrons away from hydrogen atoms. When the electrons fall back, they emit the red light which distinctively defines the glow of all emission nebulae. The Rosette Nebula is thousands of light years distant, but light would take only about 100 years to cross it. The Rosette Nebula is not difficult to observer and, although faint, actually appears larger than the full moon.

Tomorrow's picture: The Violent Star Cluster 30 Doradus


| Archive | Index | Search | Glossary | Education | About APOD |
See Explanation.  Clicking on the picture will download 
 the highest resolution version available. See Explanation.  Clicking on the picture will download 
 the highest resolution version available. Top 5 logo See Explanation.  Clicking on the picture will download 
 the highest resolution version available.

Authors & editors: Robert Nemiroff (GMU) & Jerry Bonnell (USRA).
NASA Technical Rep.: Sherri Calvo. Specific rights apply.
A service of: LHEA at NASA/ GSFC