Tag: science

TMT construction postponed again

7:49 am

The builders of the Thirty Meter Telescope have temporarily extended the suspension of construction originally demanded by Hawaii’s governor.

The tone of the article, especially the comments by the governor, suggests that the state is accepting the reality that they have no legal right to stop construction, and are making that fact very public. Instead, the govenor is now beginning the public relations campaign to make construction possible despite the protests, including negotiating some other givebacks to the protesters to shut them up. Sadly, those giveback appear to be the decommissioning of some other working telescopes as well as some increased restrictions on access to the mountain by the public.

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No obvious evidence of advanced civilizations in 100,000 galaxies

10:57 pm

A search for evidence of advanced civilizations in the WISE orbiting telescope database has come up mostly empty.

Theoretical physicist Freeman Dyson proposed in the 1960s that advanced alien civilizations beyond Earth could be detected by the telltale evidence of their mid-infrared emissions. It was not until space-based telescopes like the WISE satellite that it became possible to make sensitive measurements of this radiation emitted by objects in space.

Roger Griffith, a postbaccalaureate researcher at Penn State and the lead author of the paper, scoured almost the entire catalog of the WISE satellite’s detections — nearly 100 million entries — for objects consistent with galaxies emitting too much mid-infrared radiation. He then individually examined and categorized around 100,000 of the most promising galaxy images. Wright reports, “We found about 50 galaxies that have unusually high levels of mid-infrared radiation. Our follow-up studies of those galaxies may reveal if the origin of their radiation results from natural astronomical processes, or if it could indicate the presence of a highly advanced civilization.”

Though the spin of the article is that no clear evidence of alien civilizations was found, I am most intrigued by those 50 candidate galaxies.

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Ground-breaking for LSST takes place in Chile

3:12 pm

The official launch of construction of the Large Synoptic Survey Telescope (LSST) took place today in Chile.

Today, collaborators from the U.S. National Science Foundation (NSF), U.S. Department of Energy (DOE), Chile’s Ministry of Foreign Affairs and Comisión Nacional de Investigación Científica y Technológica (CONICYT) and several other international public-private partners will gather outside La Serena, Chile, for a traditional Chilean stone-laying ceremony to celebrate the construction launch of the Large Synoptic Survey Telescope (LSST).

They did the same kind of ceremony in Hawaii for the ground-breaking of the Thirty Meter Telescope, but things have gone very sour since. In Chile, however, I expect no problems. I wonder which local community has more sense.

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More evidence found for liquid water on Mars

8:39 am

A new study suggests that a liquid but very salty water does appear on Mars, during the night in the winter and spring months.

The team used Curiosity’s weather-monitoring equipment to look for those conditions and found that they occur every day in months throughout winter and spring. They suggest that overnight and before sunrise, some of the frost that forms on the planet’s surface interacts with the strong salts and turns liquid, seeping into the soil. This lines up with previous studies, which have detected geographic features that suggest flowing water.

The results come from the Gale Crater, which is itself too cold to support microbial life — even with liquid water present. But the study authors believe this phenomenon could occur anywhere on the planet, and may actually be more common in areas closer to the polar regions. Still, Mars is a pretty desolate place, and the amount of water we’re talking about is minimal at best. “There’s so little water that you can’t even see it visibly,” Morten Bo Madsen said.

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The distortion of the global surface temperature datasets

11:33 am

Link here. Goddard does a good job of illustrating the differences between the measured and reported climate temperature datasets, and how the reported numbers are consistently shifted to make the past cooler than measured and the present hotter than measured.

He often attributes this bias to dishonest tampering with the data to support the theory of global warming. He might be right, but it is important to remember that you shouldn’t necessarily assign malice to things that are just as easily explained by human error or stupidity. In this case he also notes that almost all the weather stations that have been decommissioned in the past few decades have been located in rural areas. To replace their data, global warming scientists average the data from nearby stations, most of which are in urban areas that exhibit warmer temperatures because city constructs tend to cause local warming. The result? The recent datasets tend to show a strong trend upward.

What is causing a cooling in the datasets from prior to 1970 however is not explained by mere error. The data hasn’t changed. Someone must be deciding to adjust it downward, for reasons that are simply not justifiable.

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Dark energy evidence found to be uncertain

10:10 am

The uncertainty of science: Astronomers have discovered that the type of supernovae they have used as a standard to measure the accelerating expansion of the universe, which also is evidence for the existence of dark energy, are actually made up of two different types.

The authors conclude that some of the reported acceleration of the universe can be explained by color differences between the two groups of supernovae, leaving less acceleration than initially reported. This would, in turn, require less dark energy than currently assumed. “We’re proposing that our data suggest there might be less dark energy than textbook knowledge, but we can’t put a number on it,” Milne said. “Until our paper, the two populations of supernovae were treated as the same population. To get that final answer, you need to do all that work again, separately for the red and for the blue population.”

The authors pointed out that more data have to be collected before scientists can understand the impact on current measures of dark energy.

It has always bothered me that the evidence for dark energy was based entirely on measurements of type 1a supernovae from extremely far away and billions of years ago. Not only was that a different time in the universe’s history when conditions could be different, our actual understanding of those supernovae themselves is very tenuous. We really do not have a full understanding of what causes them, or how they even happen. To then assume that these distant explosions are all so similar that their brightness can be used as a “standard” seems untrustworthy. From my perspective, the conclusions, though interesting, are being pushed based on extremely weak data.

The research at the link illustrates just how weak that data was.

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New Horizons begins Pluto approach phase 2 of 3

11:41 pm

It’s getting closer! On April 5 New Horizons began the second of three approach phases in preparing for its July 14 fly-by of Pluto.

During this phase, which lasts until June 23, the spacecraft’s instruments will take the first ever color and spectral photos of the Pluto system. Observations taken during this period will provide sharper focus of Pluto and its five moons. Long exposure images will scan the region for additional moons and a possible ring system. Ultraviolet observation of both the surfaces and atmospheres of Pluto and Charon will begin during this phase.

The main goal of these observations, besides gazing at Pluto and its five moons, is to scan the region that the spacecraft will pass through, and make sure there is nothing there that might pose a threat.

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Rosetta team adopts new approach strategy

9:12 am

Because of the problems Rosetta experienced during its last close fly-by of Comet 67P/C-G the engineering team has worked out a new approach strategy for future observations.

Essentially, they are postponing any close fly-bys for the near future. Instead, they will observe from farther away, while reassessing the situation and planing for later opportunities.

Meanwhile, on April 12 the next opportunity to listen for Philae begins.

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Russian hunters find frozen carcass of extinct whoolly rhino

10:38 am

In September Russian hunters accidentally discovered the frozen remains of an adolescent whoolly rhinoceros.

Larger than modern-day rhinos and more suited to extreme cold and harsh environments, the woolly rhino first appeared about 3.6 million years ago. Weighing up to an estimated 4,000 pounds and equipped with 24-inch-long horns, these intimidating creatures co-existed with early humans and were often hunted. Yet for all their strength, the woolly rhino became extinct over 10,000 years ago. Unlike the woolly mammoth, little is known about this species since few specimens have ever been retrieved. Those that have were often mummified to a point where study was impossible, and up until now, no calf has ever been found.

RT reported that experts at the Yakutsk academy will attempt to extract DNA from the calf’s remains and try to come up with a more accurate date on when the creature died. Nicknamed “Sasha,” researchers say the calf died at least 10,000 years ago and may have been 18 months old when it perished.

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Global Warming advocates debunk their own theory

10:32 am

Climate models vs climate reality

The statements and data provided by advocates of human-caused global warming themselves provide strong evidence that their theory of human-caused global warming is wrong.

The article is detailed and includes a lot of hard but easy-to-digest data, such as the graph on the right, which shows how all the computer models predicting global warming have failed to predict the lack of warming for the past eighteen years. (The models predicted the rising colored lines. Actual global temperatures are shown by the black line.) This quote however is a nice summation:

Allow us to cite one more example out of many that could be brought to bear. On June 6, 2007, the New Zealand Climate Science Coalition published an analysis of seasonal climate predictions made by the New Zealand Institute of Water and Atmospheric Research (NIWA) showing that the Institute did not even achieve 50 percent accuracy. Director Dr. Jim Renwick’s response was telling. “Climate prediction is hard, half of the variability in the climate system is not predictable, so we don’t expect to do terrifically well,” he told the New Zealand Herald. Dr. Renwick, who is an IPCC lead author and a member of the UN’s World Meteorological Organization (WMO) Commission for Climatology Expert Team on Seasonal Forecasting, stated on New Zealand Radio, “The weather is not predictable beyond a week or two.”

This is huge! Phil Jones, a top AGW guru, admits “we don’t know what natural variability is doing,” and Judith Curry says that the climate models are “imperfect and incomplete” and natural causes “dominate” human effects on global temperatures. And IPCC/WMO bigwig Jim Renwick concedes his organization’s climate predictions are wrong more than half the time — and they can’t predict the weather more than two weeks out. Yet, we are supposed to empower national and international politicians and bureaucrats to completely regulate, re-engineer, tax, and regiment human civilization on a planetary scale, based upon the same faulty computer models that have universally, spectacularly failed — over and over again.

I hate to say this, but it appears that the only “deniers of reality” we have in this debate are the political advocates of human-caused global warming, people like Barack Obama, Joe Biden, and Al Gore, who continue to refuse to recognize the reality that there has been no warming during the past eighteen years.

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New studies struggle to explain the origin of the Moon

10:03 am

The uncertainty of science: Three new studies on the mystery of the origin of the Moon all appear to better confirm the theory that it was created when the Earth collided with a Mars-sized planet.

It is important to be aware of the uncertainties here. All these studies were done to try to address problems with the impact theory, and though they kind of answer the questions, they leave behind some important doubts.

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Governor orders one week shut down of Thirty Meter Telescope project

8:46 am

Bowing to the demands of about two dozen protesters, the governor of Hawaii has ordered a one week halt in the construction of the Thirty Meter Telescope (TMT) on Mauna Kea.

You can read statements from the governor, the protesters, and the telescope’s project manager here. Make sure especially you read the statement by the telescope manager, as it outlines in great detail the negotiations over the past seven years between the telescope and the local community. This project was not forced upon them. They discussed it and agreed to it. As the statement notes,

Following an appeal of the permit and further contested case proceedings, the TMT project has proceeded in full compliance with the law. The TMT site was selected with great care and respect. There are no archaeological shrines or burial sites within TMT’s project site. Comprehensive research by expert hydrologists confirm there is no threat to the aquifer.

This is the same story we’ve seen for the past half century with every telescope that has been built in territories where the local native population has some say in construction. Years of negotiation are ignored just as construction is about to begin by a small number of protesters demanding a halt. The protesters always claim a combination of religious and environmental concerns. In every case, these so-called passionate demands somehow vanish after they are promised some additional cash.

It would a terrible tragedy for Hawaii, and the human race, if this $1.4 billion telescope ends up getting canceled because of the complaints of a handful of people who to my mind are behaving like extortionists. It will also be unfortunate if the government bows to this extortion and rewards them for this behavior.

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The hidden glaciers of Mars

8:22 am

The glaciers belts of Mars

Scientists, using computer models and radar data obtained in orbit, have detected large belts of glaciers in Mars’ upper middle latitudes, buried beneath a layer of dust.

Several satellites orbit Mars and on satellite images, researchers have been able to observe the shape of glaciers just below the surface. For a long time scientists did not know if the ice was made of frozen water (H2O) or of carbon dioxide (CO2) or whether it was mud.

Using radar measurements from the NASA satellite, Mars Reconnaissance Orbiter, researchers have been able to determine that is water ice. But how thick was the ice and do they resemble glaciers on Earth? A group of researchers at the Niels Bohr Institute have now calculated this using radar observations combined with ice flow modelling.

The press release has one typo that is important. The belts appear to be located between 30-50 degrees latitude, not 300-500 (the degree sign became a 0 by mistake).

It is important to recognize the uncertainty of this discovery. Orbital images have seen features that suggest glaciers. The evidence that it is water-ice and that the water-ice is still largely present comes from the computer models. Computer models are notorious for seeing things that end up not being there.

Nonetheless, this result is important. It is further strong evidence that Mars still contains a lot of water locked in its immediate subsurface, where future colonists can mine it and use it to survive and build their homes.

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The sunspot crash continues

11:12 am

On Sunday NOAA posted its monthly update of the solar cycle, showing the Sun’s sunspot activity in March. I am posting it here, with annotations to give it context, as I have done since 2010.

March 2015 Solar Cycle graph

The graph above has been modified to show the predictions of the solar science community. The green curves show the community’s two original predictions from April 2007, with half the scientists predicting a very strong maximum and half predicting a weak one. The red curve is their revised May 2009 prediction.

In February the Sun’s sunspot activity plunged, dropping way below the prediction of the solar science community. In March that plunge continued. Even though activity had seemed to track that prediction through most of 2014, the overall levels were always less than the prediction. The sunspot numbers for the past two months have simply made this fact obvious once again, dropping to levels almost as low as those last seen in 2011, before the onset of the solar maximum.

That the ramp down at this time is so precipitous is especially intriguing, as historically the ramp down from previous solar maximums has been slow and steady. It is once again evidence that the Sun is doing things that solar scientists have never yet had the opportunity to observe.

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Another global warming advocate demands the arrest of skeptics

10:32 am

Fascist: Continuing in what is becoming a pattern for the left, another global warming advocate has called for the arrest of anyone who dares question the existence of human-caused global warming.

You can read his entire rant here. This quote is especially telling:

Those denialists should face jail. They should face fines. They should face lawsuits from the classes of people whose lives and livelihoods are most threatened by denialist tactics.

Let’s make a clear distinction here: I’m not talking about the man on the street who thinks Rush Limbaugh is right, and climate change is a socialist United Nations conspiracy foisted by a Muslim U.S. president on an unwitting public to erode its civil liberties.

You all know that man. That man is an idiot. He is too stupid to do anything other than choke the earth’s atmosphere a little more with his Mr. Pibb burps and his F-150’s gassy exhaust. Few of us believers in climate change can do much more—or less—than he can.

This is why, at this time especially, I refuse to cede any further power to government and its allies. A significant percentage of our population is in favor of using that power to oppress their opponents. Give them any more power and they will do it.

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Brontosaurus returns!

9:14 am

The uncertainty of science: The popular but unofficial and rejected dinosaur name “Brontosaurus” has been resurrected by paleontologists.

A new study has found that the bones that had been assigned to Apatosaurus, the term that paleontologists in the 1970s chose over the more popular term Brontosaurus, actually appear to come from two distinct but different species, and they have chosen the more popular term for one of these species.

Brontosaurus was always easy to pronounce, which has probably contributed to its popularity as a general term for dinosaurs. When it was officially rejected in the 1970s there were a lot of unhappy fans of paleontology. I suspect the modern generation of scientists, children in the 1970s, had a warm spot in their heart for the term and have thus found a way to bring it back.

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ALMA captures the rotation of the large asteroid Juno

8:52 am

The large ground-based telescope ALMA has captured a series of images of the large asteroid Juno, allowing scientists to estimate its rotation and overall shape.

Linked together into a brief animation, these high-resolution images show the asteroid rotating through space as it shines in millimeter-wavelength light. “In contrast to optical telescopes, which capture the reflected light from the Sun, the new ALMA images show the actual millimeter-wavelength light emitted by the asteroid,” said Todd Hunter, an astronomer with the National Radio Astronomy Observatory (NRAO) in Charlottesville, Va.

…The complete ALMA observation, which includes 10 separate images, documents about 60 percent of one rotation of the asteroid. It was conducted over the course of four hours on 19 October 2014 when Juno was approximately 295 million kilometers from Earth. In these images, the asteroid’s axis of rotation is tilted away from the Earth, revealing its southern hemisphere most prominently.

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Dawn’s chief engineer gives us a detailed update

9:00 am

Link here. Chief engineer Marc Rayman loves to write about Dawn, and his posts on the Dawn blog are probably the most information-packed of any spacecraft blog I have ever read. Key quote this time:

Dawn’s extensive photographic coverage of the sunlit terrain in early May will include these bright spots. They will not be in view, however, when Dawn spies the thin crescent of Ceres in its next optical navigation session, scheduled for April 10.

The orientation of the spacecraft and asteroid now are such that there is no point taking pictures, as most of the asteroid is in darkness.

Read it all, however. He gives a masterful overview of what is going to happen in the coming months.

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Problems for Rosetta during its most recent fly-by of Comet 67P/C-G

8:52 am

During its most recent close fly-by of Comet 67P/C-G Rosetta had a number of issues that caused the spacecraft to go into safe mode.

During the most recent flyby, a number of issues were reported, starting with the primary star tracker encountering difficulties in locking on to stars on the way in towards closest approach. Attempts were made to regain tracking capabilities, but there was too much background noise due to activity close to the comet nucleus: hundreds of ‘false stars’ [from comet debris] were registered and it took almost 24 hours before tracking was properly re-established.

In the meantime, a spacecraft attitude error had built up, resulting in the high gain antenna off-pointing from the Earth. Indeed, a significant drop in the radio signal received by ground stations on Earth was registered. Following recovery of the star tracker system, the off-pointing was immediately automatically corrected and the operations team subsequently saw a return to a full strength signal from the spacecraft.

However, issues with false stars were still occurring. Cross comparisons with other navigation mechanisms showed inconsistencies with the star trackers and some on board reconfigurations occurred. While attempting to reconfigure those, the same error occurred again leading this time to an automatic safe mode on Sunday afternoon. Safe modes occur when certain spacecraft parameters fall out of their normal operating ranges and the spacecraft automatically takes measures to preserve its safety. This also includes switching off the science instruments to protect them.

Rosetta is operating nominally now, but these issues are going to get more serious in the coming months, as the comet gets more active. Rosetta’s engineering team is going to have to come up with a method for the spacecraft’s star trackers to distinguish between stars and the debris in the comet’s coma. If they don’t it is likely that they will have to reduce the close fly-bys significantly.

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