The Cosmos - A new comet from deep inside the Oort Cloud is winging its way across the heavens this weekend like some cosmic prima ballerina strung out on angel dust.
Comet Siding Spring, aka C/2013 A1, will be visible at twilight over Stonehenge on Saturday just as legions of punch drunk Solstice worshipping Druids congregate at the ancient neolithic monument in Wiltshire, UK.
Astronomers at nearby Alton Barnes Crop Circle Observatory where the comet is being tricked - uh, tracked! - said today they are confident C/2013 A1 will be visible at the Solstice celebrations.
And that the main body of its tail will miss Mars by some 10 light years.
But the rest of it is anybody's guess.
The Summer Solstice flypast will be the first comet phenomenon since the ill-fated Comet Bison turned into a turkey during a flaccid Thanksgiving Day cakewalk in November last year.
Siding Spring's arrival comes via a recent transit of the constellation Eridanus, sign of the River's End, in what astronomers calculate as being at a distance of about 2.46 AU (229 million miles or 368 million km) from the sun.
Saturday's brief appearance over the Stonehenge standing stones circle will be podcast live right here on this website from 4am local time.