Scientists have completed the IceCube neutrino observatory in Antarctica, a cubic kilometer in size and situated a mile deep in the ice.
Another scheme to stop a dangerous asteroid: Use a flotilla of solar sails to divert Apophis.
How close to the Sun could we get?
According to a statistical analysis, scientists predict the discovery of Earth’s twin in 2011.
Note that I reported this story three months ago, on September 13!
Alan Stern, project scientist of NASA’s mission to Pluto, New Horizons, gives his perspective ten years after the start of the project.
There’s a mini ice age coming, says a man whose predictions the last few winters have been better than the British weather service.
Good intentions strikes again! Automakers are suing the EPA over its decision to allow a higher ethanol mixture in gasoline. Key quote:
Automakers say they are worried the EPA decision would eventually lead to motorists unknowingly filling up their older cars and trucks with E15 and hurting their engines. The problem could be exacerbated if E15 fuels are cheaper than more conventional blends, prompting owners of older vehicles to use the fuel despite the potential engine problems.
Bat researchers have concluded that the fungus seen on the dying bats in the northeast United States these past four years is far more deadly than any fungus previously studied, and is increasingly believed to be the primary cause of the bat deaths. Key quote:
“This fungus is amazingly destructive — it digests, erodes, and invades the skin — particularly the wings — of hibernating bats,” said Meteyer. “The ability of this fungus to invade bats’ wing skin is unlike that of any known skin fungal pathogen in land mammals.”
Apropos my post yesterday on the sunspot cycle: A Dalton Minimum repeat is shaping up.
This research has a bearing on NASA’s plans to subsidize the new space companies: Research has found that subsidies to the Spanish film industry had no effect on its productivity, while giving awards did, increasing “internal and external distribution demand.”
A 10-man team of explorers and scientists today completed the first there-and-back crossing of the continent of Antarctica using wheeled vehicles. From the expedition blog:
We quickly took ourselves to the mess tent for some hot coffee and something which we had been craving for a while – Coca Cola. The feeling among the team was satisfaction and elation at what we had achieved and relief that the belt drive had held out! The first Expedition ever to travel coast to coast and back again, with the privilege of visiting the South Pole twice. We joked in the mess tent before deciding that we were not going to sleep and headed over to the Mechanic Area and back to the vehicles.
Radar data from the European satellite, Cryosat-2, has been used to map the ocean circulation across the Arctic basin.
For the first time since October 10, and only the third time since August, the Earth-facing side of the Sun is blank, showing no sunspots. All told, 2010 has only been blank 13% of the time, for a total of 46 blank days, with only 12 days left in the year. These numbers contrast sharply with 2009, when the Sun was blank 71% of the time, or 260 out of 365 days.
It is very clear that the solar minimum is now over, and that the Sun ramping up to its next maximum. Blank days should soon cease (today might very well be the last for years), and the number of sunspots should continue to increase through approximately 2013, when astronomers now expect the maximum to peak.
It will be a weak maximum, however, likely accompanied with cold weather. At least, this has been the pattern for the last ten centuries, based on the best data that scientists have. When the Sun produces sunspots, the Sun gets hotter, and though that increase in radiation appears slight, it seems enough to warm the Earth’s climate. This is what appears to have happened around the year 1000, during what climate scientists call the Medieval Warm Period.
And when the Sun goes blank, or produces fewer sunspots, the Sun dims, and the Earth’s climate cools. This is what happened in the 1600s and 1700s, when the Little Ice Age gripped much of the Earth. It also happened in the first two decades of the 1800s, the last time the Sun produced as few sunspots as it is now, and when at least one year was called “the year without a summer”. Interestingly, that cold period at the beginning of the 1800s was also a period of intense volcanic activity, which threw a lot of dust and material into the atmosphere and thus helped contribute to the cooling of the Earth.
The last half of the 20th century, however, has not seen that much volcanic activity, which has made the atmosphere today clearer than any time in the past five decades. It has also been a time of increased solar activity, with most of the solar maximums peaking at generally higher numbers. No wonder scientists have detected evidence of a slight warming in the climate.
However, that warming appears to be ending, and it is doing so at the same time the Sun is going spotless. Though we don’t yet fully understand the mechanics of how these two events are linked, it behooves us to pay close attention. No climate prediction or computer model will mean anything if it does not.
Meanwhile, solar scientists remain unclear about the causes behind the solar cycle’s ebbs and flows. They have a reasonable idea that the cycle is caused by the Sun’s magnetic dynamo as it flips from one polarity to another. But why this happens is still subject to debate.
More importantly, it remains a complete unknown how long the next sunspot minimum will be. The Sun could spring back to life, as it did in the 1850s, producing lots of sunspots. Or sunspots might fade out for a few additional decades, as they did in the 1600s.
Sadly, based on the state of our science today, this is a question that probably no one will be able to answer — until we actually see it happen.
NASA engineer James Fincannon emailed me the image below, cropped from this Lunar Reconnaissance Orbiter scan. It shows a side view of the same lunar pit previously discussed by me in July (here and here).
This image below was almost certainly ordered up by LRO scientists after seeing the images above so that they could get a look at the pit’s walls. I have further cropped it and blown it up so we can get a really good look too! See the second image below.
In this side view, we are looking across the top of the pit at the far wall and floor. On that far wall you can see what look like three coarse horizontal layers, below which is a deeply shadowed floor layer that is probably either cave passage or a significant overhang. Further processing will probably be bring out some further details and hopefully answer this question.
In a previous post, I had noted that this wall is probably about 200 feet deep. This new image thus gives any experienced rock-climber or caver a very nice sense of what a rappel down the side of that pit would be like. To me, it reminds me of some of the open-air cave pits I’ve rappelled into in New Mexico.
Update: I should note that that overhang/cave entrance at the bottom of the pit is probably at least 30 feet high. An impressive entrance, indeed.
Also, lunar scientist Paul Spudis emailed me with these comments:
[The pit] is very similar to some tube systems that I have studied in Hawaii. The wall units are exposed lava flows. They are probably all from the event which made this flow — a single flow can be made up of multiple flow units, hence, the apparent “layering.”
Of course, getting into an open pit and then moving through open void lava tubes that radiate from it are two different things. In terrestrial tube systems, many tubes are open and accessible but sometimes they are not. They can be blocked up by frozen lava or rubble from adjacent tube collapse.
Unfortunately, I don’t think we’re going to know what the situation on the Moon is until we get there. However, I must say, this particular area looks very promising.
Engineers now think that a cracked nozzle caused the Japanese probe Akatsuki to miss Venus.
Want to discover an exoplanet? A portion of the data being gathered by Kepler is now available online for anyone to peruse.
A scientist has made the first measurements of the strength at the Earth’s core of its magnetic field. What’s most fascinating is that he used the Moon and distant quasars to do it! First he used radio observations of the quasars to get very precise measurements of the Earth’s rotation axis and how the Moon was tugging at that axis and thus affecting its magnetic field. Then,
By calculating the effect of the moon on the spinning inner core, Buffett discovered that the precession makes the slightly out-of-round inner core generate shear waves in the liquid outer core. These waves of molten iron and nickel move within a tight cone only 30 to 40 meters thick, interacting with the magnetic field to produce an electric current that heats the liquid. This serves to damp the precession of the rotation axis. The damping causes the precession to lag behind the moon as it orbits the earth. A measurement of the lag allowed Buffett to calculate the magnitude of the damping and thus of the magnetic field inside the outer core.
Want to know what’s been killing our honeybees? It appears the EPA has known all along and looked the other way: A leaked EPA document shows that it knowingly allowed use a pesticide, despite warnings from its own scientists that it would kill honeybees.
Dead alien life arrives on Earth! Not really but still exciting anyway: Scientists have found the remains of space-born amino acids — essential to life — in the meteorite that crashed in the Sudan in 2008. Key quote:
“This meteorite formed when two asteroids collided,” said Daniel Glavin of NASA’s Goddard Space Flight Center in Greenbelt, Md. “The shock of the collision heated it to more than 2,000 degrees Fahrenheit [1,093 degrees Celsius], hot enough that all complex organic molecules like amino acids should have been destroyed, but we found them anyway.”
The discovery is further evidence that the basic elements of life can form in even the most hostile of environments.
The Air Force has agreed to share the meteorite data its surveillance satellites detect.
Though the article above makes it sound like this data includes a lot of Earth-destroying asteriods, almost all of these detections are of smaller rocks burning up in the atmosphere, information researchers need to produce a more complete census of the solar system.
A software glitch prevented Kepler from making science observations for 13 hours this week.
A cyclone on Saturn has now lasted more than five years, since scientists started tracking it closely in 2004 with the arrival of Cassini in orbit around Saturn.
The first inspection of Hayabusa’s inner chamber revealed no visible asteroid particles. A microscopic search will follow however, as was done for the outer chamber, where 1500 asteroid particles were found.
Scientists have used data from Cassini to identify what they think are ice volcanoes on Titan. The two volcanoes, each about 3000 feet high, are located near the equator and appear to resemble the volcanoes on Earth, with a central crater on top of cone-like peak and finger-like flows coming down the sides from the crater. The lava here, however, is not molten rock, but water.
Science discovers the obvious! Researchers at the University of Colorado have found that the post-9/11 security efforts — such as the TSA — do little to increase security and much to turn society into a police state.
Why Arkansas? Since September 20, the small town of Guy, Arkansa, has experienced a swarm of 487 measurable earthquakes.
Archaeologists have found a 2,400 year-old bowl of soup in China. Key quote:
The liquid and bones in the vessel had turned green due to the oxidation of the bronze, it said. Scientists were expected to conduct further tests to confirm the liquid was indeed soup and to identify the ingredients.
Today’s announcement by the Obama administration of their choice for NASA’s new chief scientist, Waleed Abdalati, reveals once again how much climate research guides their thinking, not space exploration. Key quote:
His research has focused on the study of polar ice cover using satellite and airborne instruments. He has led or participated in nine field and airborne campaigns in the Arctic and the Antarctic.
This is not a criticism of Dr. Abdalati. His research interests, however, make very clear where the Obama administration really wants NASA to look: down at the Earth instead of up beyond Earth orbit.
