Explanation: One of the largest spheres in our Galaxy is giving valuable clues about the chemical composition of stars by its very shape. Planetary nebula Abell 39, now six light-years across, was once a sun-like star's outer atmosphere expelled thousands of years ago. The nearly perfect spherical nature of Abell 39 allows astronomers to accurately estimate how much relative material is actually absorbing and emitting light. Observations indicate that Abell 39 contains only about half of the oxygen found in the Sun, an intriguing but not surprising confirmation of the chemical differences between stars. The reason why the central star is slightly off center by 0.1 light-years is currently unknown. Abell 39 lies about 7000 light years away, although several galaxies millions of light years away can be seen through and around the nebula.

<<  Yanvar'  >> Pn Vt Sr Cht Pt Sb Vs 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   2020   2021 2022   2023   2024

Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr'

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.

Publikacii s klyuchevymi slovami: Planetarnaya tumannost' - planetary nebula - Abell 39 - Abell 23 Publikacii so slovami: Planetarnaya tumannost' - planetary nebula - Abell 39 - Abell 23
Sm. takzhe: M27: eto ne kometa Dzhons-Emberson-1 Kol'ca vokrug tumannosti Kol'co HFG1 i Eibell 6: planetarnye tumannosti NGC 2440: kokon novogo belogo karlika MyCn 18: planetarnaya tumannost' Pesochnye Chasy Tumannost' Kol'co ot teleskopa "Dzheims Vebb" Vse publikacii na tu zhe temu >>