Detail View: NASA Astronomy Picture of the Day Collection: Small Galaxy NGC 4449

Title: 
Small Galaxy NGC 4449
Explanation: 
Grand spiral galaxies [ http://antwrp.gsfc.nasa.gov/apod/ap030524.html ] often seem to get all the glory. Their newly formed, bright, blue star clusters along beautiful, symmetric spiral arms are guaranteed to attract attention [ http://antwrp.gsfc.nasa.gov/apod/ap990402.html ]. But small irregular galaxies form stars too, like NGC 4449, located [ http://www.seds.org/~spider/spider/Misc/n4449.html ] about 12 million light-years away. The well-studied [ http://arxiv.org/abs/astro-ph/0010515 ] galaxy is similar in size, and often compared to our Milky Way's satellite galaxy, the Large Magellanic Cloud [ http://antwrp.gsfc.nasa.gov/apod/ap060510.html ] (LMC). This lovely color image [ http://stargazer.christelhager.info/sonic/4449.html ] shows NGC 4449's general bar shape, also characteristic of the LMC, with scattered young blue star clusters. Near the bottom is the pinkish glow of atomic hydrogen gas, the telltale [ http://antwrp.gsfc.nasa.gov/apod/ap061123.html ] tracer of massive star forming regions. NGC 4449 is a member of a group of galaxies [ http://www.atlasoftheuniverse.com/galgrps/cvni.html ] found in the constellation Canes Venatici. In fact, interactions with nearby galaxies [ http://seds.org/MESSIER/galaxy.html ] are thought to have influenced star formation in NGC 4449.
Credit and Copyright: 
Dietmar Hager [ http://stargazer.christelhager.info/sonic/ index.html ]
facet_where: 
Goddard Space Flight Center (GSFC)
facet_what: 
Canes Venatici
original url: 
http://antwrp.gsfc.nasa.gov/apod/ap070503.html
UID: 
SPD-APOD-ap070503