Changes

==Properties and Structure==

==Properties and Structure==

The nebula is around 3,500 [[light year]]s away and is 3.7 arcminutes across.<ref name=nasa/> The nebula contains a [[radio wave|radio]] source catalogued as 3C 10 and also an [[x-ray]] source.<ref name=seds/> The [[gas]] of the nebula is expanding extremely rapidly at some 9,000 km/s.<ref name=seds/> This is much faster than other nebulae such as the [[Crab Nebula]] which is expanding at only 1,000 km/s. [[Infrared]] images have shown the shockwave produced by the supernova has heated [[dust]].<ref name=nasa/>

The nebula is around 3,500 [[light year]]s away and is 3.7 arcminutes across.<ref name=nasa/> The nebula contains a [[radio waves|radio]] source catalogued as 3C 10 and also an [[x-ray]] source.<ref name=seds/> The [[gas]] of the nebula is expanding extremely rapidly at some 9,000 km/s.<ref name=seds/> This is much faster than other nebulae such as the [[Crab Nebula]] which is expanding at only 1,000 km/s. [[Infrared]] images have shown the shockwave produced by the supernova has heated [[dust]].<ref name=nasa/>

==References==

==References==