Category: Behind The Black

Study: Heaviest social media users enjoy hurting others

3:15 pm

A new study of almost 500 college-age students has found that the heaviest users of social media routinely had personalities that tended to enjoy hurting and denigrating others.

A fascinating study of 472 university students tracked their usage on two top platforms for 18-to-24-year olds: Snapchat (2.64 hours per day) and Facebook (2.28 hours per day). Researchers found that users displaying addictive behavior were also more likely to be motivated to be cruel and callous and to use others for personal gain.

“Our results demonstrate that individuals who have a greater preference for these types of rewards display greater problematic use of both platforms,” write the researchers, who note that these traits are also associated with narcissism and psychopathy and have previously been correlated with addictive internet use. They write that social media sites unwittingly “cater to people who seek rewards from being cruel, such as through cyberbullying or various aggressive online behaviors.”

Not only does this study confirm the general behavior of the bulk of all Twitter users, which has become a cesspool of slander, character assassination, and hate, it also describes the behavior of the many trolls one routinely sees commenting on websites (including Behind the Black). Too often such anonymous individuals show up throwing out comments whose only purpose is to either disagree, argue, or insult others. It requires on my part a lot of monitoring to keep such childish behavior off of this website, and this study helps to explain why it happens.

The study also provides some guidance on what adults should be doing to prevent this behavior in their children. It is a bad thing to let young children play on social media endlessly. Their use of computers and smart phones must be monitored, and their use must be disciplined, to teach children to think independently from the social media trends that can easily overwhelm them

Hat tip Ace of Spades.

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Slip-sliding away – on Mars

1:00 pm

Faults on Mars
Click for full image.

Today’s cool Martian image, rotated, cropped, and reduced to post here, comes from the camera on Mars Odyssey and was taken on May 18, 2020. It shows an area on Mars where faults and cracks in the ground have caused criss-crossing depressions. In this particular case we can see that the north-south trending fissure at some point got cut in half by east-west trending fault, its northern and southern halves thus getting shifted sideways from each other. For scale the straight section of the northern canyon is about five miles long, with the sideways shift about a mile in length.

As the caption notes, “With time and erosion this region of fault blocks will become chaos terrain,” regions of canyons often cutting at right angles to each other with flat-topped mesas and buttes in between.

Now for the mystery.
» Read more

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A July 4th Hubble image of Saturn

10:27 am

Saturn as seen by Hubble on July 4, 2020
Click for full image, annotated.

Cool image time! The photo to the right, cropped and reduced to post here, was taken by the Hubble Space Telescope on July 4, 2020, and shows Saturn, its rings, plus several moons, in all their glory.

The dot near the bottom center is Enceladus. The dot at center right is Mimas. If you click on the annotated full image it will show the locations of several other smaller moons much harder to see.

This new Saturn image was taken during summer in the planet’s northern hemisphere.

Hubble found a number of small atmospheric storms. These are transient features that appear to come and go with each yearly Hubble observation. The banding in the northern hemisphere remains pronounced as seen in Hubble’s 2019 observations, with several bands slightly changing color from year to year. The ringed planet’s atmosphere is mostly hydrogen and helium with traces of ammonia, methane, water vapor, and hydrocarbons that give it a yellowish-brown color.

Hubble photographed a slight reddish haze over the northern hemisphere in this color composite. This may be due to heating from increased sunlight, which could either change the atmospheric circulation or perhaps remove ices from aerosols in the atmosphere. Another theory is that the increased sunlight in the summer months is changing the amounts of photochemical haze produced.

The distance across from one end of the rings to the other is about 150,000 miles, about two thirds the distance from the Earth to the Moon.

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First image of multi-exoplanets around young sunlike star

10:00 am

Two exoplanets in one image

Worlds without end: Using the Very Large Telescope (VLT) in Chile, astronomers have taken the first image that captures two different exoplanets circling a young sunlike star.

The star’s light is partly blocked in the upper left of the photo to the right, cropped slightly to post here.

You can read the paper here [pdf]. The star itself, though similar in mass to the Sun, is thought to be only seventeen million years old.

But the system, dubbed TYC 8998-760-1, is nothing like our solar system. One of the star’s companions straddles the line that defines planets, with a mass 14 times Jupiter’s; the other has a mass of six Jupiters. Both orbit far from the star, about 160 and 320 times the average distance between Earth and the Sun. That puts them more than four times farther out than Pluto is from the Sun.

The size and distance of these giant planets were why they could be imaged from the ground.

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Break in fuel line caused LauncherOne failure

9:50 am

Capitalism in space: Virgin Orbit has determined that a break in the oxygen feed line in its LauncherOne rocket caused the failure during its first orbital test flight in late May.

Speaking at a webinar organized by the Space Generation Advisory Council, an organization for young space industry professionals, Dan Hart said the demonstration mission for the LauncherOne rocket May 25 went well until several seconds after the ignition of the NewtonThree engine that powers the rocket’s first stage. “We had a component break in our engine system. It was a high-pressure feed line,” he said. Liquid oxygen “stopped going into the engine and our flight was terminated.”

The company has performed an investigation and identified what needs to be fixed in the engine to strengthen the components that failed. A second LauncherOne rocket is in final integration right now and will be leaving the factory in the next few weeks while modifications to the engine continue. “We’ll be targeting our next flight before the end of the year,” Hart said.

They need to meet that schedule, as in the past few years they have consistently failed to fly when promised.

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Cubesat uses thruster to avoid collision

9:42 am

Capitalism in space: For the first time a cubesat has used a thruster to not only adjust its orbit but to also avoid a collision with another satellite.

From June 23 to July 3, the UWE-4 cubesat fired its NanoFEEP thrusters several times to reduce its altitude by more than 100 meters. By comparison, natural orbital decay would lower the altitude 21 meters in the same timeframe, according to a University of Wuerzburg news release.

One July 2, as the UWE-4 cubesat was lowering its altitude, the University received a warning from the U.S. Air Force’s 18th Space Control Squadron of a July 5 conjunction with a retired Iridium satellite. When UWE-4 mission operations personnel analyzed the conjunction, they determined the UWE-4 cubesat would not collide with the Iridium satellite because it would be orbiting at a lower altitude. As a result of the analysis, UWE-4 mission operations personnel continued firing thrusters to lower the cubesat’s altitude. They received no further conjunction messages.

The thrusters were built by Morpheus Space. Incorporating thrusters onto a cubesat, the size of which fits on the palm of your hand, is quite amazing, and illustrates the growing capability of these tiny satellites.

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Moving ripples on Mars

9:37 am

Using Mars Reconnaissance Orbiter (MRO) high resolution images, scientists have now determined that the giant ripples seen from space are actually moving, albeit very slowly.

Megaripples are found in deserts on Earth, often between dunes. Waves in the sand spaced up to tens of meters apart, they’re a larger version of ripples that undulate every 10 centimeters or so on many sand dunes. But unlike dunes, megaripples are made up of two sizes of sand grains. Coarser, heavier grains cap the crests of megaripples, making it harder for wind to move these features around, says Simone Silvestro, a planetary scientist at Italy’s National Institute of Astrophysics in Naples.

Since the early 2000s, Mars rovers and orbiters have repeatedly spotted megaripples on the Red Planet. But they didn’t seem to change in any measurable way, which led some scientists to think they were relics from Mars’s past, when its thicker atmosphere permitted stronger winds.

Now, using images captured by NASA’s Mars Reconnaissance Orbiter, Silvestro and his colleagues have shown that some megaripples do creep along—just very slowly.

They found that the ripples shift position about four inches per year, which astonished them since they had not believed the winds of Mars were strong enough to move them at all.

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Midnight repost: Elon Musk and the forgotten word

11:59 pm

The tenth anniversary retrospective of Behind the Black continues: Today’s repost comes from October 20, 2011, following Elon Musk’s National Press Club speech where he announced he was going to vertically land the Falcon 9 first stages so they could be reused. In comparing the new commercial competitive space industry with NASA’s government-run space program, I tried to outline the fundamental reason the former was always going to do better than the latter.

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Elon Musk and the forgotten word

Elon Musk at National Press Club

When Elon Musk gave his speech at the National Press Club on September 29, he was asked one question to which he really did not know the answer. He faked it, but his response illustrated how completely forgotten is one fundamental fact about American society — even though this fact is the very reason the United States became the world’s most wealthy and powerful nation less than two centuries after its founding.

To explain this fundamental fact I think I need to take a step back and talk about the ongoing war taking place right now over how the United States should get its astronauts into space. On one side we have NASA and Congress, who want NASA to build a new heavy-lift rocket to carry its Orion capsule beyond Earth orbit. On the other side we have a host of independent new space companies, all vying for the chance to launch humans and cargo into space for fun and profit.

Which is right? What system should the United State choose?
» Read more

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Tianwen-1 successfully launched, on its way to Mars

9:27 pm

UPDATE: According to news reports, China tonight successfully launched Tianwen-1 towards Mars, with arrival expected in February 2021.

Below the fold is a live stream of the launch of the Long March 5 rocket. It is not in English, and since it was not linked to China’s mission control, it only covers the first two minutes or so, after which the rocket went out of sight.

The leaders in the 2020 launch race:

17 China
11 SpaceX
7 Russia
3 ULA
3 Japan

The U.S. still leads China 18 to 17 in the national rankings.
» Read more

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Denying Americans the simple pursuit of happiness

12:59 pm

The Declaration of Independence

The last four months in the United States have probably been the ugliest seen in generations. Not only were Americans summarily put under house arrest, with churches shut and free speech muzzled, in major urban Democratically-controlled cities elected officials played favorites, allowing free speech and free movement to the leftist political activists whom these Democrats preferred, while using their police power to aggressively oppress conservatives and anyone who might be considered an opponent.

On top of this ugliness, we had our first experience of an American Kristallnacht. Not only were those leftist protesters free to protest while other Americans were on lockdown, these leftist radicals were allowed by these Democratic politicians to use violence and looting to terrorize the general population.

The nation we have today is no longer a land of liberty. Many things we only four months ago took for granted are now denied us.
» Read more

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Rover update: Curiosity pauses to drill

11:27 am

Curiosity's entire journey so far in Gale Crater

Overview map of Curiosity's recent travels

The artist’s oblique drawing above, as well as the map to the right, provide some context as to Curiosity’s present location and its entire journey in Gale Crater. For the overall context of Curiosity’s travels, see my March 2016 post, Pinpointing Curiosity’s location in Gale Crater. For all rover updates since then through May 2020, go here.

Since my last update on July 7, 2020, Curiosity has quickly moved a considerable distance to the east, as planned, skirting the large sand field to the south in its journey to the best path upward onto Mt. Sharp. The science team however has detoured away from their planned route, shown in red on the map, heading downhill a bit in order to find one last good location in the clay unit to drill. They are at that location now and are presently scouting for the best drilling spot.

About a week ago, before heading downhill, they had stopped to take a set of new images of Curiosity’s wheels. » Read more

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After releasing its Ryugu samples Hayabusa-2’s mission will continue

8:33 am

Japan’s space agency JAXA has revealed that it is looking at two fast-spinning asteroids as possible destinations for its Hayabusa-2 spacecraft after it has dropped off its samples from the asteroid Ryugu on December 6.

The candidate asteroids on the agency’s list are asteroid 2001AV43 which Hayabusa2 would reach in November 2029 after flying by Venus, and asteroid 1998KY26 which the probe would reach in July 2031 after passing by another asteroid.

JAXA says both asteroids are rotating on their axis once every 10 minutes. The high-speed spinning indicates that the asteroids’ inner structures are likely different from that of asteroid Ryugu on the first mission, which consists of pieces of rocks.

The spacecraft will no longer have the equipment for returning additional samples, but everything else is functioning and it has the fuel.

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Midnight repost: Shut down fascism in the Smoky Mountains

11:59 pm

The tenth anniversary retrospective of Behind the Black continues: In 2013 Diane and I made a trip back east to visit the Smokey Mountains and do some hiking. Coincidentally, our trip took place at the end of September, when the budget battle between Obama and the Republicans in Congress was about to cause a government shutdown. This essay, the first of three, describes the extra effort and money being exerted by Obama’s administration to make that shutdown as unpleasant and as inconvenient to the American public as possible. The later two essays, linked to as an update at the top of the essay, outline what happened next.

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Shut down fascism in the Smoky Mountains

See my October 2, 2013 update here.

Today, October 1, 2013, my wife Diane and I went hiking in Great Smoky Mountains National Park. We did this despite the news from Washington that the federal government had shut down due to the lack of a funding from Congress and that all the national parks were closed.

The news reports had said that the National Park Service would close all roads into the park except for New Found Gap Road, the one road that crossed over the mountains from Tennessee to North Carolina. They couldn’t close this road because it was a main thoroughfare used by the public for basic transportation. Moreover, my research into the hikes we wished to do told me that several of those hikes originated on trailheads along this road. In traveling the road the day before, we had seen that these trailheads would not only be difficult to close, it would be dangerous and stupid to close them. For one, the road was windy and narrow. If there was a car accident or someone had car problems, any one of these parking areas might be essential for the use of the driver as well as local police and ambulances. For another, there are people still backpacking in the mountains who will at some point need to either exit with their cars or be picked up at these trailheads. Closing the trailheads will strand these hikers in the park, with dangerous consequences.

So, despite the shutdown, off we went to hike the Appalachian Trail, going to a well known lookout called the Jump Off, an easy 6.5 mile hike that leaves from the parking area at New Found Gap, the highest point on New Found Gap Road that is also on the border between Tennessee and North Carolina. It is also probably one of the most popular stopping points along the road, visited by practically every tourist as they drive across.
Smokies from the Appalachian trail

The hike itself was beautiful, if a bit foggy and damp. The picture above shows one of the clearest views we had all day. Nor were we alone on this hike. We probably saw one to two dozen other hikers, heading out to either the Jump Off or Charles Bunion (another well known day hike destination along this section of trail).
» Read more

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Tianwen-1 launch set for July 23rd

3:09 pm

China has rolled out its Long March 5 rocket and is now preparing to launch its Tianwen-1 orbiter/lander/rover to Mars this coming Thursday, July 23rd, some time between 12 am and 3 am (Eastern).

A Long March 5 rocket is set for liftoff with China’s Tianwen 1 mission some time between 12 a.m. and 3 a.m. EDT (0400-0700 GMT) Thursday, according to public notices warning ships to steer clear of downrange drop zones along the launcher’s flight path.

Chinese officials have not officially publicized the launch date. Chinese state media outlets have only reported the launch is scheduled for late July or early August, and officials have not confirmed whether the launch will be broadcast live on state television.

This will be the first operational launch of the Long March 5, which has had three previous test launches, with the first two failing. The success of the December launch, as well as the May success of the related Long March 5B, made this Mars mission possible.

After achieving orbit in February 2021 and spending two months scouting the landing site, the lander will descend to the surface, bringing the rover with it. The prime landing site is Utopia Planitia, in the northern lowland plains.

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Utopia Planitia, the prime landing site for China’s Tianwen-1 Mars rover

1:18 pm

More blobs in Utopia Planitia
Click for full image.

Today’s cool image is not only cool, it gives a nice feel for the likely shallow ice table that is probably found close to the surface throughout the lowland northern plains of Utopia Planitia, which is also the prime landing site for China’s Taenwen-1 Mars lander/rover, scheduled for launch sometime in the next four days. [Update: there are now indications the launch will not occur until early August.]

The photo to the right, rotated, cropped, and reduced to post here, was taken on May 9, 2020 and shows a nice collection of strange land forms on the western edge of Utopia Planitia. In this one picture we can see large mounds that might be evidence of cryovolcanic activity (mud volcanoes), strings of small mounds that might be the same but that also suggest underground faults and voids, and distorted and eroded craters that could have buried glacial material in the interiors.

The largest crater in the upper left looks like it is actually filled with ice that has also spilled over to fill the adjacent and linked depression.

This location is quite typical of Utopia Planitia. See for example this post from May 13, 2020: The blobby wettish flows of Mars. In the mid-latitudes here we find ample evidence that buried very close to the surface is an ice table that when hit by an impact melts to form these strangely shaped craters.

China’s actual target landing area is far to the east of today’s cool image, in an area that is appears far less rough. » Read more

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Active volcanoes on Venus?

9:25 am

Using computer models and past radar images from orbiters, scientists now believe that Venus could have as many as 37 active volcanoes.

The type of feature on Venus they think might still be active is called a coronae, circular features detected by radar and distinct to this planet that have been thought to be inactive ancient volcanic features.

In the new study, the researchers used numerical models of thermo-mechanic activity beneath the surface of Venus to create high-resolution, 3D simulations of coronae formation. Their simulations provide a more detailed view of the process than ever before.

The results helped Montési and his colleagues identify features that are present only in recently active coronae. The team was then able to match those features to those observed on the surface of Venus, revealing that some of the variation in coronae across the planet represents different stages of geological development. The study provides the first evidence that coronae on Venus are still evolving, indicating that the interior of the planet is still churning.

Lots of uncertainty here, but nonetheless this is good science. It also reinforces other evidence in recent years that has suggested active volcanism on Venus.

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