Detail View: NASA Astronomy Picture of the Day Collection: Interstellar Dust-Bunnies of NGC 891

Title: 
Interstellar Dust-Bunnies of NGC 891
Explanation: 
What is going on in NGC 891 [ http://antwrp.gsfc.nasa.gov/apod/ap970228.html ]? This galaxy appeared previously to be very similar to our own Milky Way Galaxy [ http://antwrp.gsfc.nasa.gov/apod/ap971229.html ]: a spiral galaxy [ ftp://crux.astr.ua.edu/web/goodies/data_resources/galaxies.text ] seen nearly edge-on [ http://www.limber.org/eon0.html ]. However, recent high-resolution images of NGC 891 [ http://www.seds.org/messier/xtra/ngc/n0891.html ]'s dust show unusual filamentary patterns extending well away from its Galactic disk. This interstellar dust [ http://antwrp.gsfc.nasa.gov/apod/ap980104.html ] was probably thrown out of the galactic disk toward the halo [ http://www.bc.kern.cc.ca.us/programs/sea/Astronomy/milkyway.description/milkyway.description.html ] by stellar supernovae explosions [ http://antwrp.gsfc.nasa.gov/apod/ap980217.html ]. Because dust is so fragile, its appearance after surviving disk expulsion can be very telling [ http://www.astro.wisc.edu/~howk/Papers/N891/n891.html ]. Newly discovered phenomena, however, sometimes appear so complex [ http://antwrp.gsfc.nasa.gov/apod/ap980310.html ] that more questions are raised than are answered.
Credit and Copyright: 
C. Howk & B. Savage (Wisconsin [ http://www.astro.wisc.edu/ ]); N. Sharp (NOAO [ http://www.noao.edu/noao.html ])
keyword: 
dust
facet_where: 
Goddard Space Flight Center (GSFC)
facet_what: 
Crux
original url: 
http://antwrp.gsfc.nasa.gov/apod/ap980318.html
UID: 
SPD-APOD-ap980318