Wolfram|Alpha Astronomy

Nebulae

Emission Nebulae

compute the location and get properties of a nebula
Orion Nebula NGC 3372
compare nebulae
M43 vs IC 1871
get a property of a nebula
apparent magnitude of the Crab Nebula
locate a nebula at a specified time
IC 5070 at 3am on 18 May 2012

Planetary Nebulae

compute the location and get properties of a planetary nebula
Ring Nebula NGC 2242
compare planetary nebulae
NGC 246, IC 4732, M76
get a property of a planetary nebula
NGC 7662 apparent magnitude
locate a planetary nebula at a specified time
Helix Nebula on Sep 22, 1998 at 10:35pm

Bright H II Regions

compute the location and get properties of a bright H II region
NGC 604
compare bright H II regions
IC 140 vs IC 142
locate a bright H II region at a specified time
NGC 5906 at 7:00pm on Jan 12, 1988