NGC 7822 is a young star forming complex in the constellation of
Cepheus. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800–1000 pc distant,
[Majaess D., Turner D., Lane D., Moncrieff K. (2008)]
''The Exciting Star of the Berkeley 59/Cepheus OB4 Complex and Other Chance Variable Star Discoveries''
Journal of the American Association of Variable Star Observers, vol. 36, no. 1, p. 90[Pandey et al.(2008]
''Stellar contents and star formation in the young star cluster Be 59''
MNRAS, Volume 383, Issue 3, pp. 1241–1258 with the younger components aged no more than a few million years.
[ The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, namely BD+66 1673, which is an ]eclipsing binary
A binary star is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved using a telescope as separate stars, in w ...
system consisting of an O5V that exhibits a surface temperature of nearly 45,000 K and a luminosity about 100,000 times that of the Sun.[ The star is one of the primary sources illuminating the nebula and shaping the complex's famed ]pillars of creation
''Pillars of Creation'' is a photograph taken by the Hubble Space Telescope of elephant trunks of interstellar gas and dust in the Eagle Nebula, in the Serpens constellation, some from Earth. These elephant trunks had been discovered by Jo ...
-type formations, the '' elephant trunks''.[Gahm G. F., Carlqvist P., Johansson L. E. B., Nikolić S. (2008)]
''Rotating elephant trunks''
Astronomy and Astrophysics, Volume 454, Issue 1, July IV 2006, pp.201-212[Fernandez, Antonio (2008)]
APOD, October 18, 2008
Gallery
References
External links
*
*
{{DEFAULTSORT:NGC 7822
Cepheus (constellation)
7822
Sharpless objects
Sharpless 171
Berkeley 59
18291116
Star-forming regions