SpaceX booster damaged on barge but not lost

According to an Associated Press report today, the Falcon Heavy core stage was damaged when it toppled over in heavy seas, but was not entirely lost.

The company confirmed Tuesday that the unsecured core booster toppled onto the platform over the weekend, as waves reached 8 to 10 feet. SpaceX chief Elon Musk says the engines seem OK. There’s no immediate word on how many of the booster pieces remain on board.

Musk says custom devices to secure the booster weren’t ready in time for this second flight of the Falcon Heavy.

From this report it sounds like the engine part of the stage remained on the barge. We shall see. Also, this report might explain the lack of a robot to secure the stage. The robot wasn’t ready, but rather than delay the launch for this reason they went ahead.

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Did an interstellar meteor hit the Earth in 2014?

By analyzing the speed in which it traveled through the atmosphere, astronomers propose that a meteor that hit the ground in 2014 was probably an interstellar object.

The scientists analyzed the Center for Near-Earth Object Studies’ catalog of meteor events detected by U.S. government sensors. They focused on the fastest meteors, because a high speed suggests a meteor is potentially not gravitationally bound to the sun and thus may originate from outside the solar system.

The researchers identified a meteor about 3 feet (0.9 meters) wide that was detected on Jan. 8, 2014, at an altitude of 11.6 miles (18.7 kilometers) over a point near Papua New Guinea’s Manus Island in the South Pacific. Its high speed of about 134,200 mph (216,000 km/h) and its trajectory suggested it came from outside the solar system, the scientists said. “We can use the atmosphere of the Earth as the detector for these meteors, which are too small to otherwise see,” Loeb told Space.com.

The meteor’s velocity suggested it received a gravitational boost during its journey, perhaps from the deep interior of a planetary system, or a star in the thick disk of the Milky Way.

To put it mildly, there are a lot of uncertainties about this conclusion. Nonetheless, their approach and hypothesis is very intriguing, and seems logical.

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Beresheet failure linked to ground command

SpaceIL’s investigation into the landing failure of its Beresheet lunar spacecraft now suggests that a ground command to reactivate a balky inertial measurement unit (IMU) might have caused the main engine to shut down.

A command intended to correct a malfunction in one of the Beresheet spacecraft’s inertial measurement unit (IMUs) led to a chain of events which turned off its main engine during landing, according to a preliminary investigation conducted by SpaceIL.

…A chain of events caused by a command sent from the SpaceIL control room turned off the spacecraft’s main engine and prevented proper engine activation, Anteby said, rendering a crash-landing on the Moon inevitable.

It is still unclear how a command to one shut down the other, but the investigation is still on going. I suspect they will pin this down to a software design issue.

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SpaceX loses Falcon Heavy core stage in rough seas

SpaceX announced today that it lost the Falcon Heavy core stage in rough seas on its way back to port.

“Over the weekend, due to rough sea conditions, SpaceX’s recovery team was unable to secure the center core booster for its return trip to Port Canaveral,” SpaceX spokesman James Gleeson told FLORIDA TODAY. “As conditions worsened with eight- to ten-foot swells, the booster began to shift and ultimately was unable to remain upright.” “While we had hoped to bring the booster back intact, the safety of our team always takes precedence. We do not expect future missions to be impacted,” he said.

While SpaceX does have hardware on its drone ship designed to secure first stages – often referred to as a flat “robot” that holds them in place – it was not used for this mission, which successfully took an Arabsat satellite to orbit last Thursday. The connections between the robot and center core aren’t compatible like they would be with a standard Falcon 9 booster, but SpaceX is expected to upgrade both in the future.

This is unfortunate. At the same time, it illustrates how far ahead of its competitors SpaceX is. While others throw their first stages away, SpaceX is disappointed when it loses one.

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Seasonal frost in a gully on Mars

Frost in a gully on Mars
Click for full image.

Cool image time! The photo on the right, cropped, reduced, and brightened slightly to post here, was part of the April image release from the high resolution camera on Mars Reconnaissance Orbiter (MRO). According to the titled of this release, it purports to show visible frost on what looks like an avalanche debris slope on the rim of a large crater. The frost is the bright streaks on the upper left of the slope.

I wonder. During last month’s 50th Lunar and Planetary Science Conference in Texas, there was one paper that I reported on that showed something very similar to this, and proposed that white streaks like this in a gully were actually exposed snow/ice. They proposed that the snow/ice was normally covered by dust, and the white streaks were where the dust had blown away to reveal the ice below. This in turn would then sublimate into gas, which in turn would cause the gully avalanches over time.

Below is a close-up of the white streaks on this rim.
» Read more

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Data from Cassini’s last fly-by of Titan

Based on data from Cassini’s last fly-by of Titan, scientists have been able to estimate the depth of some of that planet’s northern lakes while also finding that they were filled mostly with methane.

The depths measured were as much as 300 feet. The data also shows that the geology of one hemisphere in the north was different from the other hemisphere.

On the eastern side of Titan, there are big seas with low elevation, canyons and islands. On the western side: small lakes. And the new measurements show the lakes perched atop big hills and plateaus. The new radar measurements confirm earlier findings that the lakes are far above sea level, but they conjure a new image of landforms – like mesas or buttes – sticking hundreds of feet above the surrounding landscape, with deep liquid lakes on top.

The fact that these western lakes are small – just tens of miles across – but very deep also tells scientists something new about their geology: It’s the best evidence yet that they likely formed when the surrounding bedrock of ice and solid organics chemically dissolved and collapsed. On Earth, similar water lakes are known as karstic lakes. Occurring in in areas like Germany, Croatia and the United States, they form when water dissolves limestone bedrock.

This data also suggests, as has previous data, that Titan could very well have extensive underground cave systems. Unlike the Moon or Mars, however, these are not going to be very hospitable to colonization, considering the presence of methane and the cold temperatures.

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Tess finds Earth-sized planet?

Scientists using the space telescope TESS think they may have found its first Earth-sized planet.

Its host star has about 80 percent of the mass of our Sun and is found about 53 light-years distant from Earth. HD 21749b has about 23 times Earth’s mass and a radius of about 2.7 times Earth’s. Its density indicates the planet has substantial atmosphere but is not rocky, so it could potentially help astronomers understand the composition and evolution of cooler sub-Neptune planet atmospheres.

Excitingly, the longer period sub-Neptune planet in this system is not alone. It has a sibling planet, HD 21749c, which takes about eight days to orbit the host star and is much smaller—similar in size to Earth. “Measuring the exact mass and composition of such a small planet will be challenging, but important for comparing HD 21749c to Earth,” said Wang. “Carnegie’s PFS team is continuing to collect data on this object with this goal in mind.”

In other words, they know almost nothing yet about the smaller exoplanet. They think it is similar in size to the Earth, but they don’t know its mass or composition.

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The routine failure of Arabian armies

Link here. This is a review of new book called Armies of Sand: The Past, Present, and Future of Arab Military Effectiveness by Kenneth M. Pollack.

Essentially, Arabian armies in the past century have routinely done terribly on the battlefield, and Pollack traces that failure to the culture of Arabia rooted in Islam.

Pollack shows that the “…most important problems that Arab militaries have experienced in battle since 1945 derive from behavioral patterns associated with Arab culture….It is striking how much the Arab armies and air forces have performed in keeping with those patterns of culturally regular behavior identified by anthropologists, sociologists, cultural psychologists, and other experts on Arab society.”

Pollack, for example, observes that military politicization evinces that a “highly valued trait of Arab society is group solidarity and loyalty.” If a leader “comes to power of any kind in the Arab world, it is expected that he will bring his relatives, clansmen, tribesmen, and coreligionists/co-ethnicists in with him and give them plum positions.” This “happens across the Arab world in every organization imaginable.”

In other words, the clan rules, no matter what, from the top down. Individual skill is given low priority, and in fact superior talent and intelligence can be seen as harmful if it threatens the cohesion of the group.

The problem is that such authoritarian systems, no matter how weak and faulty, can gain power, and squelch freedom and achievement. It was this kind of thinking that brought on the Dark Ages in Europe. Though not quite the same, during the medieval era the feudal system honored group thinking far above individual creativity, and in fact saw such achievement as a threat. The result was a thousand years of decline.

Unfortunately, we in the west are increasing accepting a variation of this thinking. Like the Dark Ages, it is increasingly considered bad to stand out as a free-thinking individual. If a twitter mob attacks, you damn well better kowtow, or face personal destruction. Society will not respect your individual rights.

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