February (Usually visible from southern latitudes)
Herschel's Ray is not truly a 'ray', but an illuminated section of the outer shockwave produced by the supernova event that created the Vela Supernova Remnant. This part of the shockwave is still travelling rapidly away from the point of the ancient supernova, rushing through space at an estimated 644,000 kilometres per hour in an approximately eastward direction (that is, towards the left of this image) as seen from Earth. Imagery provided by Aladin sky atlas
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