2021 viewer release summaries week #28

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

Updates from the week ending Sunday, July 18th

This summary is generally 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.
  • Note that for purposes of length, TPV test viewers, preview / beta viewers / nightly builds are generally not recorded in these summaries.

Official LL Viewers

  • Release viewer: Project UI RC viewer, version 6.4.20.560520, dated June 14th, promoted June 23rd – No change.
  • Release channel cohorts:
    • Fernet Maintenance RC viewer updated to version 6.4.21.561414, on July 14th.
  • Project viewers:
    • No updates.

LL Viewer Resources

Third-party Viewers

V6-style

  • No updates.

V1-style

Mobile / Other Clients

  • No updates.

Additional TPV Resources

Related Links

A trip to Blackwood Farm in Second Life

The Blackwood Farm, July 2021 – click any image for full size

Following a recommendation from Shawn Shakespeare (SkinnyNilla), I opted to spend a little time on the farm. The Blackwood Farm, to be precise, a Homestead region gorgeously presented for public visits / use by Corvus Blackwood.

Sitting under a burnished summer sky, the clouds turned to bronze by a low-hanging Sun, the region presents as a single island into which  a channel of water has cut its way, roughly dividing the landscape almost into two. To the west, the land is predominantly low-lying, to the east it is dominated by a raised table of rock marked to the north and south by ribbons of scrubby coastline, the former of which sweeps east and west across the width of the region, curving past a small off-shore isle to the west, the home of a squat lighthouse watching over the channel between the two landmasses.

The Blackwood Farm, July 2021

The western side of the setting is home to the Blackwood Farm. This is a place, we’re informed by a large friendly sign close to the landing point, that is family owned and operated. An unfenced field of corn sits just behind the sign, stretching south along the track leading up to the farm, fir trees and a rocky mound also sitting with it within an oval of rutted tracks.

An aging gateway and fading wall guard the entrance to the inner sanctum of the farm. They face the imposing farmhouse that is flanked by barns to either side, and is fronted by a square fenced field of cattle.  It is a peaceful, pastoral setting: chickens wander freely, apples are in the process of being picked from a little copse of trees, a little lemonade stand awaits those in need of refreshment. In fact the setting is so peaceful, deer are happy to graze on the grass within the farm’s grounds.

The Blackwood Farm, July 2021

The farm is overlooked to the west by a uplift of land topped by a windmill that offers one of the many places to sit within the setting, a pair of batterer trailer homes sitting in the shadow of the hill, between it and the span of the south coast. Very rough and ready in their set-up, the two trailers are clearly occupied: a fire pit is burning, a fan is on to cool seats under one of the trailer’s awnings – but both have been left to a little goat to watch over. It forms one of several small vignettes awaiting discovery by visitors, and which bring the entire setting together as a whole.

Over to the east, the primary upland is home to the Apple Fall Old Manufactory, a structure that is so popular among region designers that at times it feels as if it is a required feature within an public region. Its popularity is likely down to both its aged looks and its flexibility of use. Here it has been turned into a charming house, complete with a large patio terrace that stretches from it to a little open-sided potting shed. It is an altogether eye-catching setting – but do please be aware that the house is actually a private residence, as indicated by the localised ban lines that will appear if you stray too close.

The Blackwood Farm, July 2021

The rest of the hilltop is very much open to exploration, as is the rough coastline to the north and below it. Reached by steps cut into the slope of the upland, this coastal area is again a place of little vignettes – a camp site, walks, a dock stretching out over the water and little boats that again add to the richness of the setting.

Those wishing to rez within the region can do so by joining the local group (fee: L$250) – but those who do re asked to clean-up after themselves.

The Blackwood Farm, July 2021

Such is the all-round natural looks to the setting, it really is an ideal location for avatar photography whilst the landscaping is equally photogenic; what is more, the setting works equally well under a range of different environment setting to the default – as I hope can be seen in a couple of the images here.

Whether or not you opt to play with the environment settings or use the shared environment, The Blackwood Farm is visually and – thanks to its sound scape – aurally engaging, richly detailed, and a joy to explore and photograph. This being the case, it should come as no surprise that I’d note it as a recommended visit.

The Blackwood Farm, July 2021

SLurl Details

Space Sunday: rovers, rockets and telescopes

An image of a ridge line on the flank of “Mount Sharp” (Aeolis Mons) captured by MSL rover Curiosity on Sol 3167 (July 4th, 2021). A CGI model – to scale – of the rover has been superimposed on the image to show how the rover’s climb up the ridge might appear to someone watching it. Credit: NASA/JPL with additions by Seán Doran

Rovers on Mars continue to been busy as they trundle around the planet. While it has been there the longest, NASA’s Mars Science Laboratory (MSL) rover Curiosity has been somewhat out of the news, courtesy of it’s sister Perseverance and China’s Zhurong. However, it has recently re-grabbed the science news headlines thanks to a couple of studies.

Methane blips have pinged on Curiosity’s Tunable Laser Spectrometer (TLS) six times since the rover landed in Mars’ Gale crater in August 2012. These events have been seen as important, because methane is the by-product of two processes that share equal interest to scientists, because one is the result of organic processes – life – and the other, though inorganic in nature, points to geological activity closely tied to the presence of liquid water, a vital ingredient for past or present life as we know it to thrive.

A critical factor with methane is that once exposed to sunlight, it breaks down over a period of just 300-330 years, so for Curiosity to be able to detect it, it must have come from a relatively recent source – one that still may be active. The problem until now has been to locate that source – or even confirm Curiosity’s findings.

The European Space Agency’s Trace Gas Orbiter, part of the ExoMars mission, and currently studying Mars. Credit: ESA

The best placed tools for doing the latter are aboard the European Space Agency’s Trace Gas Orbiter (TGO), but to date, TGO has been unable to detect any methane within Gale Crater. The could either be because there isn’t any methane to be found, or the minute amounts  – just 10 parts per billion (10 ppb) – is too small and too localised for TGO to accurately detect from orbit, and Curiosity just happens to be sitting practically on top of it.

In one of two reports released in June, members of the MSL’s extended science team they have pin-pointed the source location for the methane, and that the rover happened to arrive in Gale Crater at a point extremely close to it.

This was done by treating each point of detection as a discrete packet of methane, then calculating the wind speed and direction at the time it was detected. This allowed them to trace the parcels back through time to their possible points of emission. By doing this for all of the different detection spikes, they were able to triangulate regions where the methane source is most likely located- and one of them is just a few tens of kilometres to the north-west of “Mount Sharp” and Curiosity’s area of exploration.

Sadly while tantalisingly close to the rover, the point is still well outside of Curiosity’s route of exploration.

MSL Curiosity, imaged by the HiRISE camera aboard NASA’s Mars Reconnaissance Orbiter, on April 18, 2021. Credit: NASA/JPL

A second study coming out of Curiosity’s science data suggests that a process has been at work on Mars that has been both eradicating evidence for possible past life on Mars – and creation conditions in which new life might arise.

In short, when reviewing the result of samples taken of ancient mudstone, a sedimentary rock containing clay, taken from two points just 400 metres apart and believed to have both been laid down some 3.5 billion years ago. Both should have been very similar in nature, rich in clay, an important element in the search for life, as it is both created in the presence of water and is an excellent medium for storing microbial fossils. However, one of the samples contained just half the anticipated amount of clay minerals in comparison to the other, but a much higher concentration of iron oxides –  the compounds that give Mars its rusty hue.

The researchers behind this discovery believe it is the result of one of the two areas of mudstone being exposed to brine: salty water that leaked into the mineral-rich mudstone and effectively leached the clays and other minerals out of them, effectively eradicating both the geological and possibly the biological record that might otherwise be present in the deposits. Given that evidence of potentially brine-rich outflows have been found elsewhere on Mars, this study suggests this process might be common to regions of the planet believed to have once housed bodies of water, possibly destroying any evidence of past life.

However, the process – called diagenesis – is not all bad news. While it may well help erase any record of past organic activity from parts of the surface or Mars, it may also have triggered new life processes under the surface, the salty water being a source of potential energy that could help kick-start new organic processes.

Image of the “Raised Ridges” that Ingenuity captured on its ninth flight. Credit – NASA / JPL

The findings of both of these studies are being used to inform the science mission of NASA’s latest Mars rover, Perseverance, allowing the science team to apply what has been found in Gale Crater to Jezero Crater, to better direct that rover towards places of interest.

“Percy”, to use the nickname for NASA’s latest Mars rover is also being assist in finding places of interest – and the best route to them – by the Ingenuity helicopter. This has now completed its 9th flight , during which it acted directly as an aerial scout for the rover, including the “Raised Ridges”, a feature that suggests it may one once had a water channel beneath it. Ingenuity has also identified a dune field that could result in “Percy” becoming bogged down – as happened with the MER Spirit rover in 2009/10 – ending its mission.

What is particularly fascinating about this work is that the information gathered by Ingenuity can be fed back to Perseverance and used by its auto-drive system to identify local hazards – rocks, etc – the rover can then navigate itself around without having to “‘phone home” for assistance from the Earth-based driving team.

Ingenuity’s view of the “Séítah” dune field on it’s ninth flight. Part of the helicopter’s landing gear can be seen on the left side of the screen. Credit: NASA / JPL 

Meanwhile, China’s Zhurong rover is now 2/3rds of the way through its initial 92-day / 90 Sol mission. During that time, the rover has travelled a total of 450 metres, and on July 12th, 2021, it arrived at a special point of study – but one that is neither geological nor meteorological / atmospheric, the rover’s primary science interest.

Instead, the rover had arrived at the impact / landing point for the backshell and parachute that had helped it to reach the ground safely. Following it separation from these during descent, the rover had moved away from it under the power of its lander’s rocket motors ready to make a soft landing. The backshell and parachute continued downward to eventually land some 350 metres from the lander / rover.

Studying both the backshell and parachute helped engineers understand how well both handled the descent through the Martian atmosphere, something that can help inform future missions. At the same time, the rover imaged raised mounds in the region, which could be inverted impact craters or possibly small volcanic domes or other features could be the result of tectonic activity – their nature has yet to be made clear (one of which has been incorrectly labelled as a “outflow delta” in the video below).

Continue reading “Space Sunday: rovers, rockets and telescopes”