Changes

{{Night Sky

{{Night Sky

| image          =

| image          =

| designation    =[[Messier catalogue|Messier 27]]

| designation    =[[Messier catalogue|Messier 27]]<br/>[[NGC]] 6853

[[NGC]] 6853

| rightascension  =19^h 59^m 36.340^s<ref name=messier-objects>[http://www.messier-objects.com/messier-27-dumbbell-nebula/ Messier 27: Dumbbell nebula] from messier-objects.com</ref>

| rightascension  =19^h 59^m 36.340^s  

| declination    =22° 43′ 16.09″<ref name=messier-objects/>

| declination    =22° 43′ 16.09″

| distance        =1,360 ly<ref name=messier-objects/>

| distance        =1,360 ly  

| constellation  =[[Vulpecula]]

| constellation  =[[Vulpecula]]

| type            =[[Planetary nebula]]

| type            =[[Planetary nebula]]

| dimensions      = 2.88 ly

| dimensions      =8x5.6'<ref name=messier-objects/>

| magnitude      = 7.5

| magnitude      =Apparent Mag: +7.5<ref name=messier-objects/><br/>Absolute Mag: -0.6<ref name=messier-objects/>

| redshift        =

| redshift        =-0.000140±0.000017<ref name=simbad>[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=m27&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id M27] from simbad.u-strasbg.fr</ref>

| radvelocity    =

| radvelocity    =-42±5 km/s<ref name=simbad/>

| propmotion      =

| propmotion      =

| parallax        =

| parallax        =2.47±0.16 mas<ref name=simbad/>

}}

}}

The '''Dumbbell nebula''', sometimes referred to as the Diabolo nebula or the Apple Core nebula, is a [[planetary nebula]] in the [[constellation]] of [[Vulpecula]].<ref name=messier-objects>[http://www.messier-objects.com/messier-27-dumbbell-nebula/ Messier 27: Dumbbell nebula] from messier-objects.com</ref> Perhaps the best example of a planetary nebula, it was the first planetary nebula to be discovered and the second brightest.<ref>[https://freestarcharts.com/messier-27 Messier 27] from freestarcharts.com</ref> However, its greater surface brightness makes for an easier target than the [[Helix nebula]].<ref name=messier-objects/> Its name comes from its dumbbell appearance, though it has sometimes also been compared to an hourglass figure.

The '''Dumbbell nebula''', sometimes referred to as the Diabolo nebula or the Apple Core nebula, is a [[planetary nebula]] in the [[constellation]] of [[Vulpecula]].<ref name=messier-objects/> Perhaps the best example of a planetary nebula, it was the first planetary nebula to be discovered and the second brightest.<ref>[https://freestarcharts.com/messier-27 Messier 27] from freestarcharts.com</ref> However, its greater surface brightness makes for an easier target than the [[Helix nebula]].<ref name=messier-objects/> Its name comes from its dumbbell appearance, though it has sometimes also been compared to an hourglass figure.

==History==

==History==