2017 Viewer release summaries week 25

Logos representative only and should not be seen as an endorsement / preference / recommendation

Updates for the week ending Sunday, June 25th

This summary is published every Monday, and is a list of SL viewer / client releases (official and TPV) made during the previous week. When reading it, please note:

  • It is based on my Current Viewer Releases Page, a list of all Second Life viewers and clients that are in popular use (and of which I am aware), and which are recognised as adhering to the TPV Policy. This page includes comprehensive links to download pages, blog notes, release notes, etc., as well as links to any / all reviews of specific viewers / clients made within this blog
  • By its nature, this summary presented here will always be in arrears, please refer to the Current Viewer Release Page for more up-to-date information.

Official LL Viewers

LL Viewer Resources

Third-party Viewers

V5-style

V1-style

Mobile / Other Clients

  • No updates.

Additional TPV Resources

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Space Sunday: other worlds, near and far

Curiosity on “Mount Sharp” as seen by the Mars Reconnaissance Orbiter. Credit: NASA/JPL / MSSS  (click for full size)

NASA’s Mars Science Laboratory rover, Curiosity continues to climb Aeolis Mons (“Mount Sharp”), and in doing so, it has been once again imaged from orbit by the HiRISE camera system on NASA’s Mars Reconnaissance Orbiter (MRO). The image was captured on June 5th, 2017 (Curiosity’s 1717th Martian Sol), at the same time the rover was engaged in taking colour images of its surrounding using its mast-mounted Navcam system.

MRO has actually been imaging Curiosity roughly once every three months, as the orbiter’s track around Mars carries it over “Mount Sharp” and the rover’s route up the mound’s flank. However, these aren’t simply happy snaps of the rover’s progress: MRO is actively monitoring the terrain around the rover to allow scientists to check for changes – such as movement among sand dunes – and to help plan the rover’s route up the slopes.

The June 5th image, released by NASA on June 20th, has been colour enhanced to better reveal Curiosity as a bright blue feature. To give an idea of scale and resolution, the rover is some 3 metres (10ft) in length and 2.8 metres (9 ft) wide.

A mosaic of images captured by Curiosity using the Navcam system, looking back along the rover’ route up “Mount Sharp” towards the distant rim of Gale Crater. The images making up the view were all captured on June 5th, 2017 (Sol 1717 for the rover), the same day as MRO imaged the rover from orbit. Credit: see image

Curiosity is currently traversing ground between two points of scientific interest: the “Bagnold Dunes”, an area of sand dunes which are slowly progressing down the side of “Mount Sharp” as a result of both wind action and gravity; and a high-standing ridge which runs parallel to the eastward side of the dune field. Dubbed the “Vera Rubin Ridge” after the American astronomer who pioneered work on galaxy rotation rates, this ridge line is of interest to scientists because it has been shown to exhibit signatures of hematite, an oxidized iron mineral which can provide clues to the environmental conditions on this region of “Mount Sharp” when it formed.

The route to the ridge is slightly circuitous. At the moment the rover is heading east-north-east around a small set of dunes. Once clear of them it will turn south-east and drive to where a potential safe route up onto the ridge has been identified. The drive is further slowed as Curiosity periodically pauses to capture images of the feature to help scientists characterize any observed layers, fractures, or geologic contacts and better understand determine how the ridge formed, and its relationship to the other geologic units found within Gale Crater.

The route ahead: a June 14th (Sol 1726) mosaic captured by Curiosity, showing “Vera Rubin Ridge”, which was roughly 370 metres (114 ft) away from the rover at the time the images were captured. Credit: NASA/JPL / MSSS / Ken Kremer / Marco DiLorenzo

At the same time NASA released the image of Curiosity seen from orbit, half a world away, attempts to correct a wheel problem the solar-powered Opportunity Mars Exploration Rover (MER) had been experiencing appeared to end in partial success.

“Oppy” had suffered a failure with its left-front wheel steering actuator on June 4th, leaving the wheel angled and unable to straighten. After numerous attempts to correct the issue, a new approach tested on June 20th resulted in the wheel turning correctly and resuming its proper alignment with the other wheels. However, what originally caused the actuator to fail remains unknown, and there is concern that it might recur.

To limit the risk of this happening and possibly stranding “Oppy”, the rover will avoid all use of its front wheel steering, and will only use its rear wheel steering when absolutely necessary. To maintain manoeuvrability, it will instead rely on “tank steering” – effectively running the drive motors for the wheels on one side of the rover in opposition to those on the other, allowing Opportunity to turn left or right more-or-less on the spot, a technique the rover is designed to use. This should allow the rover to continue its current survey of “Perseverance Valley” in preparation for a descent into Endeavour Crater.

“Planet Nine” Set to Become “Planet Ten”?

I’ve written extensively in these pages about the hunt for “Planet Nine” (or “Planet X” or “George”, “Jehoshaphat” or “Planet of the Apes” as some would have it): the Neptune-sized world believed to be orbiting the sun at a distance of at least 200 astronomical units (AUs – one AU being the average distance of the Earth from the Sun) in a highly eccentric orbit.  The search for that world is still continuing, but if a new study is confirmed, that mystery world may well have to give up its “Planet Nine” title for another.

A planetary mass object the size of Mars would be sufficient to produce the observed perturbations in the distant Kuiper Belt. Credit: Heather Roper/LPL

Kat Volk and Renu Malhotra of the University of Arizona’s Lunar and Planetary Laboratory, offer compelling evidence of a yet-to-be-discovered planetary body with a mass somewhere between that of Mars and Earth, orbiting the Sun much closer than the mysterious “Planet Nine”, at around 50 AU distance.

Whilst carrying out a detailed studying of Kuiper Belt Objects (KBOs) – the disk of rocky asteroids and comets surrounding the Sun from a distance of around 30 AU to about 50-60 AU, Volk and Malhotra discovered a consistent anomaly. Whilst most KBOs surround the sun with orbital inclinations that average out to what planetary scientists call the “invariable plane of the solar system”, they discovered that the more distance KBOs – those around 50 AU or over from the Sun are tilted away from the invariable plane by about eight degrees.

The pair surveyed around 600 of the 2,000 observed KBOs, and found all of those on the outer reaches of the Kuiper Belt to be inclined from the invariable plane by roughly the same amount and in numbers that tend to preclude a statistical fluke. In modelling possible causes for this, they discovered that an object with a mass of Mars, orbiting about 50-60 AU would cause just such a disruption, as would a Earth-sized body slightly further away.

However, Volk and Malhotra carefully avoid any suggestion there is a Mars- or Earth-sized body is awaiting discovery, noting that the disruption might also be the result of several large (but not planet-sized) masses lying within the outer fringes of the Kuiper belt. Even so, a single body would seem more likely, and given it is effectively sitting within the galactic plane – an area so densely packed with stars that solar system surveys tend to avoid it – could explain why it has been able to remain undetected.

An artist’s rendering of the LSST atop Cerro Pachón mountain, Chile. When LSST starts taking images of the entire visible southern sky in 2022, it will produce the widest, deepest and fastest views of the night sky ever observed. Over a 10-year time frame, LSST will image several tens of billions of objects and create movies of the sky with unprecedented detail – and might reveal whatever is causing the odd perturbations among the KBOs studied by Volk and Malhotra. Credit: Large Synoptic Survey Telescope Project Office

But it might not remain hidden for much longer. 2020 should see the Large Synoptic Survey Telescope (LSST) come on-line. This 8.4 metre (27.6 ft) primary mirror telescope is due to commence a 10-year sky survey in 2022. Among other things, it is expected to increase the number of KBOs so far observed from 2000 – to over 40,000 as it carries out real-time surveys of the sky, night after night. In doing so, it could well find any planet-sized body lurking near them.

Continue reading “Space Sunday: other worlds, near and far”

Kultivate Select Summer themed exhibition in Second Life

Kultivate Select Gallery

Sunday, June 25th marks the opening of the Kultivate Select Gallery’s June exhibition at Water Haven.

All artists invited to exhibit at the gallery must have previously exhibited with Kultivate, and are asked to display in accordance with any theme set for the exhibition – this month’s being “Summer”.

The June exhibition features the artists Bri Graycloud, CalystiaMoonShadow, captainofmysoul, Catalina Staheli, Inara Pey, John Brianna, Karma Weymann, talligurl, Tisephone and Veruca Tammas.The opening for the exhibition is at 13:00 SLT, and will feature live vocal artist Nina Bing, who will be performing through to 14:00 SLT.

Kultivate Select Gallery

SLurl Details

Seanchai Library Comes to Holly Kai Park

Seanchai Library, Holly Kai Park

It’s time to kick-off another week of storytelling in Voice by the staff and volunteers at the Seanchai Library. As always, all times SLT, and events are held at the Library’s new home at Holly Kai Park, unless otherwise indicated.

I’m absolutely delighted to see Seanchai at the Park, becoming part of our family and helping to expand our support of the arts in second Life. The familiar programme of weekly storytelling from Seanchai will continue via their new headquarters at the park, while they’ll also be able to run special events using the park’s grounds and our sky platforms.

So, without further ado, here’s the first week of events from Seanchai Library.

Sunday, June 25th, 13:30: Tales of Ships, the Sea and Other Wetness

Join Library staff and guests in a celebratory 90-minute event to launch their new season at their new home at Holly Kai Park .

Monday, June 26th 19:00: The Book of Skulls

Gyro Muggins reads Robert Silverberg’s novel.

Four friends, college room-mates, go on a spring break trip to Arizona: Eli, the scholar, who found and translated the book; Timothy, scion of an American dynasty, born and bred to lead; Ned, poet and cynic; and Oliver, the brilliant farm boy obsessed with death.

Somewhere in the desert lies the House of Skulls, where a mystic brotherhood guards the secret of eternal life. There, the four aspirants will present themselves–and a horrific price will be demanded.

For immortality requires sacrifice. Two victims to balance two survivors. One by suicide, one by murder.

Now, beneath the gaze of grinning skulls, the terror begins. . . .

Tuesday, June 27th 19:00: The Ordinary Princess

Faerie Maven-Pralou reads MM Kaye’s 2002 novel.

In true fairytale style, the seventh princess is blessed with gifts by a host of fairies, but as her father fears, it goes wrong and one slightly bitter fairy ‘blesses’ her with ordinariness.

So no golden curls, stunning beauty and sublime grace for Princess Amethyst Alexandra Augusta Araminta Adelaide Aurelia Anne. Her dark hair and freckles make Amy (no ordinary princess can be called anything else) stop every suitor from pursuing her. She decides to run away and make her own life, away from boring princes and a confined life.

A life in the forest is bliss, but eventually Amy realises she will need some money, and must find work. So it is that she becomes the fourteenth assistant kitchen maid at a neighbouring palace. And there  – much to everyone’s surprise – she meets a prince just as ordinary (and special) as she is!

Wednesday, June 28th 19:00: The Girl Who Drank the Moon

Caledonia Skytower reads Kelly Barnhill’s 2017 Newbery Medal winner.

Every year, the people of the Protectorate leave a baby as an offering to the witch who lives in the forest. They hope this sacrifice will keep her from terrorizing their town. But the witch in the forest, Xan, is kind and gentle. She shares her home with a wise Swamp Monster named Glerk and a Perfectly Tiny Dragon, Fyrian.

Xan rescues the abandoned children and deliver them to welcoming families on the other side of the forest, nourishing the babies with starlight on the journey.

One year, Xan accidentally feeds a baby moonlight instead of starlight, filling the ordinary child with extraordinary magic. Xan decides she must raise this enmagicked girl, whom she calls Luna, as her own.

To keep young Luna safe from her own unwieldy power, Xan locks her magic deep inside her. When Luna approaches her thirteenth birthday, her magic begins to emerge on schedule–but Xan is far away. Meanwhile, a young man from the Protectorate is determined to free his people by killing the witch. Soon, it is up to Luna to protect those who have protected her–even if it means the end of the loving, safe world she’s always known.

Thursday, June 29th

19:00: Moby-Dick Part 1

“Call me Ishmael.” So begins one of the greatest works of imagination in literary history, Herman Melville’s magnificent Moby-Dick or, The Whale.

As Ishmael is drawn into Captain Ahab’s obsessive quest to slay the white whale Moby-Dick, he finds himself engaged in a metaphysical struggle between good and evil. More than just a novel of adventure, more than a paean to whaling lore and legend, this is a haunting social commentary populated by some of the most enduring characters in literature.

The crew of the Pequod, from stern, Quaker First Mate Starbuck, to the tattooed Polynesian harpooner Queequeg, are a vision of the world in microcosm, the pinnacle of Melville’s lifelong meditation on America.

Written with wonderfully redemptive humour, Moby-Dick is a profound, poetic inquiry into character, faith, and the nature of perception. Join Shandon Loring as he commences a reading of this magnificent tale.

 

21:00: Seanchai Late Night

Contemporary science fiction with Finn Zeddmore.

 


Please check with the Seanchai Library’s blog for updates and for additions or changes to the week’s schedule.

The featured charity for May through July is Alex’s Lemonade Stand Foundation, raising awareness of childhood cancer causes and funds for research into new treatments and cures.