Year: 2015

More confirmation from Curiosity of past lakes in Gale Crater

2:25 pm

New data from Curiosity has now provided further confirmation that the deeper sedimentary layers seen in Gale Crater were likely formed far in the past by flowing water.

“Paradoxically, where there is a mountain today there was once a basin, and it was sometimes filled with water,” said John Grotzinger, the former project scientist for Mars Science Laboratory at the California Institute of Technology in Pasadena, and lead author of the new report. “We see evidence of about 250 feet (75 meters) of sedimentary fill, and based on mapping data from NASA’s Mars Reconnaissance Orbiter and images from Curiosity’s camera, it appears that the water-transported sedimentary deposition could have extended at least 500 to 650 feet (150 to 200) meters above the crater floor.”

Furthermore, the total thickness of sedimentary deposits in Gale Crater that indicate interaction with water could extend higher still, perhaps up to one-half mile (800 meters) above the crater floor.

Above 800 meters, Mount Sharp shows no evidence of hydrated strata, and that is the bulk of what forms Mount Sharp. Grotzinger suggests that perhaps this later segment of the crater’s history may have been dominated by dry, wind-driven deposits, as was once imagined for the lower part explored by Curiosity.

This was always the reason to go and climb Mount Sharp. As Curiosity heads uphill it begins to map out the geological history of Mars, first as a wet place with liquid water, then as a dry place in which the water is gone.

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Ice and blue skies on Pluto

11:59 am

New data downloaded from New Horizons has confirmed the presence of ice on the planet’s surface, as well as suggesting that the planet’s sky might actually be colored blue.

The haze particles themselves are likely gray or red, but the way they scatter blue light has gotten the attention of the New Horizons science team. “That striking blue tint tells us about the size and composition of the haze particles,” said science team researcher Carly Howett, also of SwRI. “A blue sky often results from scattering of sunlight by very small particles. On Earth, those particles are very tiny nitrogen molecules. On Pluto they appear to be larger — but still relatively small — soot-like particles we call tholins.”

Scientists believe the tholin particles form high in the atmosphere, where ultraviolet sunlight breaks apart and ionizes nitrogen and methane molecules and allows them to react with each other to form more and more complex negatively and positively charged ions. When they recombine, they form very complex macromolecules, a process first found to occur in the upper atmosphere of Saturn’s moon Titan. The more complex molecules continue to combine and grow until they become small particles; volatile gases condense and coat their surfaces with ice frost before they have time to fall through the atmosphere to the surface, where they add to Pluto’s red coloring.

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Kevin McCarthy drops out of Speaker election

10:06 am

Congressman Kevin McCarthy (R-California) has just announced that he is dropping out of the race for House Speaker.

This is a breaking story, so details remain sparse. However, McCarthy’s exit today suggests that the power of the conservatives, who just yesterday threw their backing to Daniel Webster (R-Florida), is very strong. With two of the top guys from the old Republican leadership out, things are now certainly going to change in the House. This opens up the Speaker election, making it possible for a new compromise candidate to step forward. More important, that candidate is going to have to respect the demands of the conservative wing, which forced this election.

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Army building its first operational ray gun?

9:45 am

Lockheed Martin has begun production on a laser weapon designed to be mounted to U.S. Army vehicles.

The ATHENA laser can be operated by a single person and is made up of multiple fiber laser modules, which not only allows for greater flexibility, but also lessens the chance of the weapon being knocked out by a minor malfunction, so frequent repairs aren’t required. Lockhead Martin also says that the modular design means that the laser power can be varied across an extremely wide range to suit specific mission needs. Using off-the-shelf commercial fiber laser components to keep down costs, the modules can be linked together to produce lasers of up to 120 kW.

ATHENA was tested in March when it took out a pickup truck with a sustained 30 kW burst.

While stun and disintegration ray guns seem cool in science fiction, in battle something as complex and as cutting edge as this is likely not be be very practical. New technology needs a lot of testing to make its workings robust, something that is essential in the harsh conditions of battle. To me, this sounds more like pork, government money being wasted to keep people employed.

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Cygnus grabs March Atlas 5 launch slot

9:15 am

The competition heats up: Taking advantage of delays in prepping a NOAA weather satellite, Orbital ATK has grabbed a March launch slot on the Atlas 5 for its Cygnus capsule.

Originally Orbital was going to launch on an Atlas 5 in December and then late in 2016 (based on Atlas 5 launch manifest availability), with the Antares launching a Cygnus in-between. By taking this March Atlas 5 launch, they can push the Antares return-to-flight launch back, thus giving themselves more time to install and test its new Russian first stage engines.

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Second Atlas 5 launch in only six days

9:04 am

The competition heats up: Only six days after its previous launch, a ULA Atlas 5 today successfully launched an American surveillance satellite.

This was the shortest time yet between Atlas 5 launches. While the most likely reason for the quick turnaround was centered on the needs of the satellites, I also suspect the increased competition for launch services has prodded ULA to demonstrate improved capabilities.

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Sierra Nevada touts new work on Dream Chaser

9:14 pm

The competition heats up: As part of the normal lobbying that companies due prior the awarding of a government contract, Sierra Nevada today put out a press release describing the work they are doing to prepare both their Dream Chaser engineering test article (ETA) for glide tests and their Dream Chaser orbital vehicle for flight tests.

The announcement describes how they plan to do the next ETA glide test early in 2016, followed by orbital test flights of the orbital vehicle. Of course, that plan depends entirely on whether NASA picks them as one of the two companies for the second round of contracts to provide cargo to ISS.

The release however does include a nice picture of the ETA, which looks completely ship-shape following the failure at landing of one of its landing wheels during the first glide test. They have since replaced those wheels, which came from an airplane and were not the intending wheels for the actual spacecraft.

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Construction by helicopter

6:01 pm

An evening pause: As noted on the youtube webpage, “The last two components of the Incity Tower spire were put in place by helicopter on Sunday 21 June [2015]. This metallic spire, which measures 50 metres and weighs 25.9 tonnes, took the building to its final height of 200 metres. This confirms its position as the highest tower in Lyon and the third highest in France. Three aerial beacons and a lightning rod will now be placed at the top.”

Hat tip Phill Oltmann.

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Conservative Republicans back Webster for Speaker

4:24 pm

The fight is on! The Freedom Caucus, a group of about 40 to 50 conservative tea party Republicans in the House, has announced that they intend to back Daniel Webster (R-Florida) for Speaker, rejecting the establishment choice of Kevin McCarthy (R-California).

Rep. John Fleming (R-La.) said Webster’s focus on procedural changes convinced conservatives to back him. “We need to have a voice, we need to have power rather than have the speaker dictate to us,” he said. “It is clear that our constituents will simply not accept a continuation of the status quo, and that the viability of the Republican Party depends on whether we start listening to our voters and fighting to keep our promises,” the Freedom Caucus said in a statement. “We accordingly believe that, under the present circumstances and without significant changes to Conference leadership and process, Rep. Daniel Webster would be best equipped to earn back the trust of the American people as Speaker of the House.”

In the end I suspect the Speaker will not be Webster, but this announcement is going to force the Republican leadership to concede power to the conservatives, something the voters have clearly wanted for the past few elections.

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Government admits whole milk was always good for you

4:06 pm

The uncertainty of science: A new study has found that whole milk not only does not increase heart disease, it might even help prevent it.

The most significant part of this story however is that when the federal government made the original recommendation that people stop drinking whole milk to avoid fats, the science behind that recommendation was flawed and inconclusive.

But even as a Senate committee was developing the Dietary Goals, some experts were lamenting that the case against saturated fats was, though thinly supported, was being presented as if it were a sure thing. “The vibrant certainty of scientists claiming to be authorities on these matters is disturbing,” George V. Mann, a biochemist at Vanderbilt’s med school wrote in the New England Journal of Medicine. Ambitious scientists and food companies, he said, had “transformed [a] fragile hypothesis into treatment dogma.”

As Morrissey says at the link, “Golly, doesn’t that sound … familiar?”

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How the Republican Party might break-up

12:06 pm

Devin Nunes (R-California), a establishment Republican supporting Kevin McCarthy (R-California) for House Speaker, said today that any Republicans who don’t vote for McCarthy should be kicked out of the party.

Nunes is talking about the final House-wide vote for Speaker. First the Republicans vote in private among themselves, picking their nominee. McCarthy is expected to easily win that vote. Then the entire House votes. Some conservatives are threatening to not vote for McCarthy in that House-wide vote in order to extract greater influence over the entire party. Nunes wants them ejected from the party if they do that.

I have also read another story, the link to which I can’t find now, where establishment Republicans want to codify what Nunes is saying, so that any Republican who voted against McCarthy in the final vote would be kicked out of the party. If this happens, then we might very well see the Republican Party split, something that I increasingly see as a possibility. Right now the party is trying to be too big a tent, including conservatives and many moderate Democrats who find the modern Democratic Party unacceptable. (This is one reason why the Republican presidential field is so large.)

Should the party split, we might also eventually see the withering away of the Democratic Party, which today is very corrupt and far too leftwing for most Americans. If the Republicans split into conservative and moderate wings, many of those disenchanted Democrats would move to the moderate Republican faction. The result would be to cut off the corrupt modern Democratic Party from the reins of power.

I am of course being hopeful and naively optimistic. A more likely scenario would be for the Republican Party to split in such a way that the unified Democrats, still corrupt, would take over.

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Ozone-destroying gas suddenly decreases for no reason

11:49 am

The uncertainty of science: Scientists are baffled by the sudden drop in one kind of atmospheric hydrochlorofluorocarbon (HCFC) gas that is thought to help create the hole in the ozone layer above the south pole.

New measurements show that after a rapid increase of the compound in the atmosphere of the Northern Hemisphere from 0.13 parts per trillion (ppt) in 2000 to 0.50 ppt in 2013, the concentration suddenly dropped to about 0.44 ppt by early 2015. This drop in concentration is equivalent to a 50 percent decline in global emissions percent of the gas: from 3,000 metric tons (3,300 US tons) in 2011 to about 1,500 metric tons (1,700 tons) in 2014, according to the new study.

Now for the kicker: They not only don’t know why this HCFC suddenly declined, they also don’t know where it is coming from. This gas is not one of the gases that were restricted decades ago to save the ozone hole. Until last year, scientists hadn’t even known it existed. And though the article claims it is human-caused, they haven’t yet identified how humans cause it. They hope its sudden decline in the atmosphere will help them pin down its source.

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