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 waves|radio]] source catalogued as 3C 10 and also an [[x-ray]] source.<ref name=seds/> The spectacular image on the right shows the nebula in [[x-ray]]s and was taken by the [[Chandra|Chandra Space telescope]]. 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. This expansion is clear in images taken over a period of 15 years by Chandra.<ref>[http://chandra.harvard.edu/photo/2016/tycho/ Tycho's Supernova Remnant: Chandra Movie Captures Expanding Debris From a Stellar Explosion] from chandra.harvard.edu</ref> [[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 spectacular image on the right is a false color image of the nebula in [[x-ray]]s and was taken by the [[Chandra|Chandra Space telescope]]. 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. This expansion is clear in images taken over a period of 15 years by Chandra.<ref>[http://chandra.harvard.edu/photo/2016/tycho/ Tycho's Supernova Remnant: Chandra Movie Captures Expanding Debris From a Stellar Explosion] from chandra.harvard.edu</ref> [[Infrared]] images have shown the shockwave produced by the supernova has heated [[dust]].<ref name=nasa/>

==References==

==References==