NGC 2903 [SEP] constellation
NGC 2903
NGC 2903 is a field barred spiral galaxy about 30 million light-years away in the constellation Leo. It was discovered by William Herschel who cataloged it on November 16, 1784. NGC 2903 has a very high rate of star formation in its central region. NGC 2905 is a bright star cloud within this galaxy. 
NGC 2903 is part of the Virgo Supercluster.
External links.
- SEDS: Spiral Galaxy NGC 2903
- NOAO: NGC 2903
five galactic star forming regions have associated formaldehyde maser emission, which has only been observed through the 1 → 1 transition. Because of the widespread interest in interstellar formaldehyde it has recently been extensively studied, yielding new extragalactic sources, including NGC 253, NGC 520, NGC 660, NGC 891, NGC 2903, NGC 3079, NGC 3628, NGC 6240, NGC 6946, IC 342, IC 860, Arp 55, Arp 220, M82, M83, IRAS 10173+0828, IRAS 15107+0724, and IRAS 17468