Via Slashdot, astronomers are forwarding the conjecture that like the other Saturnine satellites Titan and Enceladus, the mysterious and icy Mimas—heretofore most well known for being an actual moon despite its resemblance to the Death Star (formally ♄ I and named after the Giant, at the suggestion of William Hershel's son John like the others in this complex system after the Giant born of the blood of castrated Uranus and killed by Hephaestus during the Gigantomachy) may possibly harbour a vast liquid ocean several kilometres beneath its frozen crust. Going by the above initialism “interior water ocean worlds.” More at the links above.
Monday, 24 January 2022
iwows
catagories: ๐ง, ๐ญ, ๐ช, myth and monsters, Star Wars
Sunday, 22 August 2021
♄ viii
Discovered by Italian astronomer Giovanni Domenico Cassini in 1671 and later dubbed after the titan Iapetus after the naming convention established by William Herschel—with the antiquated adjectival form of Japetian that points to the conflation of the deity with Japheth, brother of Moses—and explored more thoroughly during the 2007 mission named after its discoverer, the satellite of Saturn first loomed large in human imagination when on this day in 1981 the Voyager 2 probe relayed the featured image back to Earth. The prominent equatorial ridge, named the Voyager Mountains after the photograph are among the highest in the known Solar System, and ring the object almost perfectly, giving rise to the theory that the feature is a reabsorbed ring and the probable but yet unseen occurrence of sub-satellites.
catagories: ๐ซ๐ท, ๐ฎ๐น, ๐ญ, ๐ช, myth and monsters
Tuesday, 25 August 2020
the stars align
On this day in 2012, the space probe Voyager I became the first manmade object to leave the Solar System and enter interstellar space. Twenty-three years earlier—to the day—its companion Voyager 2 made its closest approach to Neptune—then, because of Pluto’s eccentric, elongated orbit, the outer most planet.
On the same day in 1981, it had its closest brush with Saturn. All these events coincided with the first demonstration of the telescope in Venice in 1609, pitched as a terrestrial telescope or spyglass, having later realised their potential for use in astronomy, publishing his initial observations in a brief called Sidereus Nuncius (Starry Messenger) on 13 March of 1610, including an account of the Medicean or Cosmica’s Stars that appeared to orbit Jupiter.
Sunday, 7 June 2020
tpv-15
Though this image is just about three years old, one of the parting shots of the Cassini probe before it descended into the atmosphere of Saturn, we appreciated the reminder, a sense of proportion that’s much needed right now, from Strange Company of the Earth and the Moon framed by the Encke Gap of the gas giant’s rings—see previously—and for couching it in the POV of the Hitchhiker’s Guide to the Galaxy’s Total Perspective Vortex, a device (see also) originally built as a heuristic tool to demonstrate causality by extrapolating a model of the Cosmos from a single atom.
In application, however, exposing the mind to such a humbling vision of reality was overwhelming and the technology was mainly useful as an instrument of torture—execution, that is, with a final moment of clarity and transcendence. The only biological brain subjected to the Vortex to survive unscathed, protagonist Zaphod Beeblebrox, was only able to do so through the protective bunker of a computer-generated universe that was created specifically to shield him, and with the confidence, hubris that he in fact was the most important person in his paracosm was able to get through the ordeal with minimal amount of insight to put him in his place.
Friday, 28 February 2020
♄
Via Kottke’s Quick Links we are treated to a scientific assessment and ranking on the accuracy of the Ringed Planet emoji, assuming that they are aiming for Saturn, across differing platforms and operating systems—see previously. Apple’s version is rated most visually accurate, even including details like the Keeler gap in the rings and the polar hexagon though the tilt is over exaggerated by about twice as much.
Wednesday, 19 February 2020
georgium sidus
Writing for รon magazine, historian of astronomy Stephen Case guides us on a fascinating and convoluted process on how the naming conventions of the planets came to be through the lens of the discovery of what we now know as Uranus by William Herschel in March of 1781–the first new planet since antiquity and in (relatively) quick succession what we now call Neptune by Urbain Le Verrier. Whereas Uranus had been marauding through the night sky unrecognised for the planet it is and mistook for a star of the firmament and initially reported as a comet and left to the discoverer’s son to champion, Neptune existence was mathematically derived and then verified through observation, the only standing precedent for naming rights came from the Galilean moons of Jupiter named the Stars of the Medici after Galileo’s patrons.
To the extent that one bothered to differentiate the satellites at all, co-discoverer Simon Marius, astronomer royal of the Margraviate of Ansbach, suggested that they be named after their planetary analogues: the Mercury of Jupiter and so on—before ultimately being named for paramours of Zeus. The elder Herschel had named his discovery after George III, somewhat of a consolation for loosing the American colonies, a decision his son and intellectual heir regretted but was adamantly against the counter suggestion by Le Verrier that they name the planets after themselves. The younger Herschel found a way out of this impasse by returning to the subject of naming satellites—specifically for those orbiting Saturn, a couple of which he had discovered himself. Mythologically awkward to name the moons after family members of the Titan who deposed his father—Ouranos, Uranus incidentally—and devoured his children, Herschel proposed naming the moons after peer giants and giantesses. The matter was settled and extended to keeping the planets named after Greco-Roman gods—rallied by choosing to call a newly isolated element uranium after the ancient sky deity. By dint of the sheer number of Cronian satellites, giants from other pantheons are admitted as well. Though arguably installing an Anglo-American hegemony among the stars, the International Astronomical Union while not neutral does promote inclusion in its work. Though eschewing the honour himself, the Hawaiian term (whose own legends are enjoying more representation) for Uranus is Hele’ekala, a loan word for Herschel.
Wednesday, 18 December 2019
afterthought
catagories: ๐ญ, ๐ช, myth and monsters, physics, Wikipedia
Friday, 11 October 2019
ymir and jรกrnsaxa
With the discovery of twenty more natural satellites in its orbit this year, the cronian constellation surpasses Jupiter as the planet with the most moons, an astonishing eighty-two.
The new moonlets are distant objects travelling around Saturn in the opposite direction from the inner moons and are suspected to be captured asteroids and are part of the Norse group—the International Astronomical Union (previously) reserving the naming-convention to figures from Nordic mythology (see also), mostly after giants and giantesses, with the exception of Phoebe, named after a Greek Titaness discovered in 1899, before the establishment of the IAU and the first moon discovered via photography. The public is invited to take part in coming up with their official designations.
catagories: ๐ณ๐ด, ๐ญ, ๐ช, myth and monsters
Friday, 28 June 2019
saturn vi
Though exploration of the Cronian satellite cannot begin before 2034 (distant-seeming but only fifteen years hence), NASA has committed, choosing among twelve contending proposals, to send a fleet of aerial drones to survey Titan, more planet than moon-like with a dense atmosphere, complex terrain, weather and methane driven precipitation similar to the water cycle on Earth, only sustainable at much lower temperatures, to seek out alien life.
Tuesday, 7 November 2017
♄ ii
Not only have astronomers possibly deduced the mechanisms that generate and sustain heat to keep the subsurface ocean of the Cronian moon Enceladus from freezing over but can also extrapolate from their research that there has been a watery environment under the frozen shell for billions of years.
The satellite is named after the primordial giant (dread offspring of the Titans) that sparred with the Olympian goddess Athena in the Gigantomachy, and vanquished was buried beneath Mount รtna. Attributed as the cause of volcanic eruptions and earthquakes, scientists had their curiosity about the tiny moon piqued when they observed dramatic geysers of water shooting out of the southern hemisphere and seeding one of Saturn’s outer-most rings, and they thought an ocean might be hiding below as with Europa. Presumably, the age of the ocean would be long enough and stable enough to allow life in some form to gain a purchase and adapt to such harsh conditions. Looking out at this distance, delicate arrangement (though others might think that a barrier of ice is far more sheltering that the cold, open sky) makes me lament how careless we are with our ecosystem and hope that we might not have to learn the hard way.
catagories: ๐, ๐ญ, ๐ช, environment, myth and monsters
Friday, 8 September 2017
crest and trough
As Kottke informs, during one of its final passes of the Saturn system, the Cassini probe (previously) delivers an image of a spiral density wave in one of the planets rings that illustrates the complexity and nuance of gravitational relationships. The ripples are caused by the waltz of two satellites, Janus and Epimetheus, which share the same orbital path and trade places as leader and follower with a period of four years. Like extracting historical data from tree growth rings, gauging the distance between the waves reveal details about past trajectories.