Astronomers have compiled the first detailed 3D map of the inner regions of the Milky Way. More here.
They find a box/peanut shaped bulge with an elongated bar and a prominent X-structure, which had been hinted at in previous studies. This indicates that the Milky Way was originally a pure disk of stars, which then formed a thin bar, before buckling into the box/peanut shape seen today.
Using photos from Dawn astronomers have now assembled an online atlas of the asteroid Vesta that the public can explore.
It appears that Deep Impact is lost.
The uncertainty of science: Despite the significant increase in the size of the Arctic Ocean’s icecap this winter, satellite data of the icecap’s actual volume and thickness suggest that the new ice was quite thin.
Prof Andy Shepherd, from Leeds University, said: “Now that we have three years of data, we can see that some parts of the ice pack have thinned more rapidly than others. At the end of winter, the ice was thinner than usual. Although this summer’s extent will not get near its all-time satellite-era minimum set last year, the very thin winter floes going into the melt season could mean that the summer volume still gets very close to its record low,” he told BBC News.
It is not surprising that the ice was thin, considering that the icecap was recovering from a record low the year before. The scientific question, however, is whether the cap will thicken in the coming years or continue to thin out. That it has recovered somewhat in size might be a onetime jump as the decline continues, or it might be indicative of a new growing trend.
After more than two weeks the labor strike at the ALMA telescope array in Chile has ended.
Today NOAA posted its monthly update of the solar cycle, and as I do every month, I am posting it here, with annotations.
Before we take a look at that, however, there is other climate news that is apropos. The Daily Mail in the UK put out an entertaining article on Saturday with the headline “And now it’s global COOLING! Record return of Arctic ice cap as it grows by 60% in a year.”
The article is entertaining because, after illustrating the ice-cap’s recovery this year, it then notes the 2007 prediction by global warming climate scientists that the Arctic Ocean would be “ice-free” by 2013. If this isn’t a good example of the dangers of crying wolf, I don’t know what is.
I should emphasize that the ice-cap recovery this year does not prove that global warming has ceased. A look at this graph from satellite data shows that even though the Arctic icecap has recovered, it is still remains small when compared to the past few decades. The increase this year might only be a blip, or it could be indicating a new trend. We won’t really know for another five years, if then.
The article is also entertaining because it outlines the confusion that is right now going on behind the scenes at the IPCC. The next IPCC report is scheduled to come out next month, but no one agrees with its conclusions because it apparently ignores or minimizes the approximately fifteen year pause in warming that has now been documented since the late-1990s.
In its draft report, the IPCC says it is ‘95 per cent confident’ that global warming has been caused by humans – up from 90 per cent in 2007. This claim is already hotly disputed. US climate expert Professor Judith Curry said last night: ‘In fact, the uncertainty is getting bigger. It’s now clear the models are way too sensitive to carbon dioxide. I cannot see any basis for the IPCC increasing its confidence level.’ [emphasis mine]
It appears that scientists and governments are demanding approximately 1500 changes to the IPCC draft, which suggests its release will be delayed significantly.
Meanwhile, the Sun continues its lackluster and weak solar maximum.
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NASA engineers have successfully fixed the glitch on the LADEE spacecraft.
NASA’s lunar probe LADEE was successfully launched tonight from Wallops Island.
Update: A computer glitch occurred shortly after reaching orbit, causing the computer to shut down the spacecraft’s reaction wheels.
Engineers seem unworried, and expect to have the problem solved within a couple of days.
Some good news from the James Webb Space Telescope: The project manager said today that all the problems outlined in a December GAO report have been resolved.
Some of these issues are also described here.
NASA has lost contact with its Deep Impact probe and is racing against time to save it.
Cumulative data from a variety of space probes now shows that the direction of the interstellar wind has shifted during the past forty years.
How to view the east coast launch on Septembert 6 of LADEE.
LADEE will attempt to solve the leftover question from the Apollo-era: Does the surface dust on the Moon levitate? The question is real, and the consequences could be significant for future lunar settlements.
A survey of planetary nebulae near the Milky Way’s central bulge has revealed that they tend to be aligned with each other.
This discovery is unexpected and suggests that the influence of the bulge, probably its magnetic field, is far greater than predicted.
Astronomers submit a slew of proposals for using the partly crippled Kepler space telescope.
Ideas range from a survey of potentially hazardous near-Earth objects to a study of Jupiter-sized exoplanets in large orbits. Kepler scientists will sort through the proposals and decide by 1 November which ones, if any, to recommend to NASA headquarters for further review.
Sadly, none of these ideas excites me very much. The tragedy here is that we have this really good optical telescope above the atmosphere, and we can’t point it accurately enough to use it.
Brazil stalls paying its share for the construction of the Extremely Large Telescope.
They signed the agreement in 2010, but can’t get their legislature to allocate the money.
The next IPCC report: “The timing couldn’t be worse.”
The author describes how the new report, due out in just a couple of months, is probably already obsolete because of a slew of new papers documenting the long 10 to 15 year pause in global warming that was not predicted by any of the climate models used by the IPCC.
This quote I think sums things up nicely, however:
Due to a ‘combination of errors’, the models have overestimated warming by 100% over the past 20 years and by 400% over the past 15 years.
More extreme weather, eh? There were no Atlantic hurricanes in August this year, for the first time in eleven years.
As I’ve noted repeatedly, there is no evidence yet of an increase of extreme weather events as predicted by global warming advocates. In fact, some recent data suggests a decline, though I personally wouldn’t take that seriously either.
So, when Al Gore or Barack Obama or Dianne Feinstein starts running around like Chicken Little, claiming the sky is about to fall, remember these facts.
Hubble sees a cosmic caterpillar.
I am always astonished at the weird loveliness of these astronomical objects. They are big, tenuous, faint, and almost impossible to see. And yet, when we tease them out of the darkness they blind us with beauty.
Using the combined power of 200,000 home computers astronomers have discovered 24 new pulsars in the Milky Way.
Astronomers have identified a star almost identical to the Sun, except that it is 4 billion years older.
They have dated this old age by the amount of lithium detected in the star.
