Year: 2016

Ceres’ cratered surface

10:27 am

Ceres' crated surface

Cool image time! The picture on the right, reduced to show here, was taken on October 17 and was the tenth image taken by Dawn in its new extended mission in orbit around Ceres.

This image of the limb of dwarf planet Ceres shows a section of the northern hemisphere. A shadowy portion of Occator Crater can be seen at the lower right — its bright “spot” areas are outside of the frame of view. Part of Kaikara Crater (45 miles, 72 kilometers in diameter) is visible at top left.

The image was taken from 920 miles away and has a resolution of about 460 feet per pixel.

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Drilling at the Chicxulub impact site has unveiled the crater’s shape

10:19 am

The new rock core drilled at the crater impact site that is thought to have help cause the extinction of the dinosaurs 65 million years ago has helped reveal the crater’s formation and shape, including the existence of an inner ring of mountains which scientists call a peak-ring.

After a decade of planning, the project penetrated 1,335 metres into the sea floor off the coast of Progreso, Mexico, in April and May. Drillers hit the first peak-ring rocks at a depth of 618 metres, and a pinkish granite at 748 metres. Geologists know that the granite must have come from relatively deep in the crust — perhaps 8–10 kilometres down — because it contains big crystals. The size of these crystals suggests that they formed by the slow cooling of deep, molten rock; in contrast, rapid cooling at shallow depth tends to form small crystals. Finding the granite relatively high in the drill core means that something must have lifted it up and then thrown down it on top of other rocks.

That rules out one idea of how craters form, in which the pulverized rock stays mostly in place like hot soup in a bowl. Instead, the core confirms the ‘dynamic collapse’ model of cosmic impacts, in which the asteroid punches a deep hole in the crust, causing the rock to flow like a liquid and spurt skyward. That rock then falls back to Earth, splattering around in a peak ring.

To put it another way, the impact moved the earth like a pebble dropped into a pond of water, causing at least two big circular ripples that flowed just like water but then quickly froze in place to form the two concentric peak-ring mountain ranges.

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Boeing files FCC application for 3,000 satellite constellation

10:10 am

The competition heats up: Boeing this week submitted its second application to the FCC for its own 3,000 satellite constellation to provide “a wide range of advanced communications and Internet-based services.”

The second application this week specifically requested permission to launch the first 60 satellites. The whole plan is comparable to the one that SpaceX submitted earlier this week, and puts these two companies in direct competition. If both plans are launched, it will mean that more than 6,000 satellites will need launch services to gain orbit, which also means the launch business could get very busy in the coming years.

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NASA global warming advocate Gavin Schmidt fights back

10:05 am

The head of NASA’s Goddard Institute of Space Studies (GISS), Gavin Schmidt, declared in a newspaper interview on Thursday that “Global warming doesn’t care about the election.”

The science community and environmental campaigners in the US have already begun efforts to persuade Mr Trump that climate change is actually real before he takes office next year. Dr Gavin Schmidt, the director of Nasa’s Goddard Institute for Space Studies, signalled they would have allies among the federal science agencies. He tweeted a graph including new data from Nasa showing that last month was the second warmest October on record, putting 2016 firmly on course to be the warmest year. “No surprise here, planetary warming does not care about the election,” he wrote.

I would not be surprised if Schmidt ends up getting fired by Trump. His monthly graphs showing each month to be the hottest on record, such as the one he tweeted in the quote above, have been absurd campaigning, not science. For one thing, the differences from month to month have been in the hundredths of a degrees, well within the margins of error and essentially insignificant in value. To claim that his data has determined the “hottest” month on record from this is demonstrating that he is not a scientist, but a political activist.

Gavin Schmidt vs the satellite data

Secondly, his data is not trustworthy to begin with. Schmidt has been in charge of all of the data tampering at NASA that has consistently altered the decades-old surface temperature record — without any clear scientific justification — to cool the past and warm the present so that the amount of warming is emphasized. While his graphs show the climate to be warming, based on surface data that he has been adjusting, the satellite data that NASA gathers that he (a NASA scientist) generally ignores, does not. The image to the right illustrates this, and shows that the divergence between his adjusted surface data and the satellite data has been increasing steadily over the years.

I fully expect Schmidt and the other global warming scientists in NASA and NOAA to team up with the press, as Schmidt does here, to defy Trump. Whether Trump will have the courage to fight back, something no Republican has been willing to do for decades, will be the key question.

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“You are still crying wolf.”

9:38 pm

Link here. This essay sums up the bankrupt intellectual American community — so partisan Democratic that they have lost all sense of honor or dignity — probably better than anything I have read in decades. And it was written by a person who dislikes Donald Trump strongly, but for very thoughtful and reasonable reasons. As he pleads in conclusion,

Stop fearmongering. Somewhere in America, there are still like three or four people who believe the media, and those people are cowering in their houses waiting for the death squads.

Stop crying wolf. God forbid, one day we might have somebody who doesn’t give speeches about how diversity makes this country great and how he wants to fight for minorities, who doesn’t pose holding a rainbow flag and state that he proudly supports transgender people, who doesn’t outperform his party among minority voters, who wasn’t the leader of the Salute to Israel Parade, and who doesn’t offer minorities major cabinet positions. And we won’t be able to call that guy an “openly white supremacist Nazi homophobe”, because we already wasted all those terms this year.

Read it all. He illustrates the unwillingness of the modern left (that dominates the academic community, the mainstream press, and the urban cities) to deal in actual facts. Instead, they scream vicious lies against every Republican candidate and thus make it impossible to have a sane conversation.

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Boeing and Russia to partner on building lunar space station?

5:22 pm

As part of a settlement with Boeing in the Sea Launch lawsuit, the Russians are proposing a partnership with the American company for building a lunar orbiting space station.

A preliminary dispute settlement deal was reached in August. “We are preparing a document which, apart from finalizing the court case, also creates a program for long-term cooperation on a wide range of issues. We are working on projects to cooperate in low earth orbit, create moon infrastructure and explore deep space,” Solntsev told the Russian Izvestia newspaper. The two companies now plan to create nodes and units capable of synchronizing space technologies, including a docking station for a proposed lunar orbiting station. Meanwhile, Sea Launch settlement documents are set to be signed before the end of November, according to Solntsev.

It will be very interesting to see the actual agreement. I also wonder how much Boeing can really do with Russia without U.S. government approval.

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Scientists puzzle over possible connection between a fast radio burst and a gamma ray burst

9:31 am

The uncertainty of science: In trying to explain the relatively new mystery of fast radio bursts (FRB), of which only about 20 have been detected and of which very little is known, scientists are intrigued by a gamma ray burst (GRB) that apparently occurred at the same time and place of one FRB.

Seeing the FRB event in a different wavelength would normally help astronomers better understand the FRB The problem is that this particular GRB only makes the mystery of FRBs more baffling.

One puzzle is that the two signals portray different pictures of the underlying source, which seems to be as much as 10 billion light years (3.2 gigaparsecs) away. Whereas the radio burst lasted just a few milliseconds, the γ-ray signal lasted between two and six minutes, and it released much more energy in total than the radio burst. “We’ve pumped up the energy budget more than a billion times,” says study co-author Derek Fox, an astrophysicist at Penn State.

This has big implications for the FRB’s origin. One leading theory suggests that FRBs are flares from distant magnetars — neutron stars with enormous magnetic fields that could generate short, energetic blasts of energy, and do so repeatedly, as at least one FRB is known to do. Although magnetars are thought to produce γ-rays, they would not emit such high energy and over such a long time, says Fox. “This is a severe challenge for magnetar models,” he says.

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