A union strike has shut down the new ALMA telescope array in Chile.
A union strike has shut down the new ALMA telescope array in Chile.
Tag: science
“An inconvenient untruth.”
Some historical perspective about what we know about the polarity reversal of the Sun’s magnetic field.
Some historical perspective about what we know about the polarity flip of the Sun’s magnetic field at solar maximum.
This article gives the right kind of background information that was not provided by other recent news stories.
Curiosity snaps a spectacular image of Mt Sharp as it begins its journey to the mountain’s base.
Curiosity snaps a spectacular image of Mt Sharp as it begins its journey to the mountain’s base.
The rover has already traveled more than a mile. The mountain however remains about five miles away.
NASA will reactivate the Wide-field Infrared Survey Explorer (WISE) next month to use it to look for more near Earth asteroids.
NASA will reactivate the Wide-field Infrared Survey Explorer (WISE) next month to use it to look for more near Earth asteroids.
This decision raises two thoughts.
- Why did they shut it down in the first place if it was still viable and could still do important research? If the cost wasn’t worth the benefit then, how has this equation changed now? And if the cost was worth the benefit, it then was foolish to shut it down in the first place. Though it costs money to operate these things, it is always cheaper to keep something running than to build something new. The press announcement above doesn’t really address these issues, and I wish it did.
- I wonder if this decision is somehow related to the end of the Kepler mission. With Kepler out of service, maybe NASA decided to shift the funds to run that telescope over to WISE. They do not say, but the timing is interesting. This decision could be a hint that Kepler doesn’t really have another mission it can fulfill, and thus the money to run it has already been put elsewhere.
The rover Opportunity has settled into its winter haven on Mars.
The rover Opportunity has settled into its winter haven on Mars.
The rover’s handlers plan to get Opportunity up onto Solander Point’s north-facing slope before mid-December, NASA officials said. But the golf-cart-size robot won’t hibernate through the winter; rather, it will continue to move about, investigating several different Solander Point outcrops.
The Moon’s dirtiest secret: Does its dust levitate?
The Moon’s dirtiest secret: Does its dust levitate?
This is a serious mystery left over from the Apollo missions which has significant ramifications not only for future research (the dust would interfere badly with any astronomical observatories) but also for any colonies that are eventually established.
A draft of the next IPCC climate report has arrived, and it is more of the same: We are all gonna die!
A draft of the next IPCC climate report has arrived, and it is more of the same: We are all gonna die!
An international panel of scientists has found with near certainty that human activity is the cause of most of the temperature increases of recent decades, and warns that sea levels could conceivably rise by more than three feet by the end of the century if emissions continue at a runaway pace. The scientists, whose findings are reported in a draft summary of the next big United Nations climate report, largely dismiss a recent slowdown in the pace of warming, which is often cited by climate change doubters, attributing it most likely to short-term factors. The report emphasizes that the basic facts about future climate change are more established than ever, justifying the rise in global concern. It also reiterates that the consequences of escalating emissions are likely to be profound.
I love the way the journalist here uses the term “climate change doubters.” Throughout the story it is applied to skeptical scientists in such a way as to imply that any doubt about these conclusions is obviously something to snicker at and to ignore.
As for the claim that the seas will rise three feet in the next 90 years, note that the level of sea rise has been consistently between 2 and 3 millimeters per year for the past half century, even as we have been pumping carbon dioxide into the atmosphere and the climate has supposedly warmed. At 3mm per year, the seas will only rise 270 millimeters by the end of the century, or just under 11 inches, not three feet as claimed by this new IPCC report.
Observations of the comet that the European probe Rosetta will visit next year suggest it is becoming active earlier than expected.
Observations of the comet that the European probe Rosetta will visit next year suggest it is becoming active earlier than expected.
A star that went nova last week is now visible to the naked eye.
A star that went nova last week is now visible to the naked eye.
“Nova Delphini 2013 is among the 30 brightest novae ever recorded,” says S&T editor in chief Robert Naeye. “It’s a wonderful target for backyard observers, given that it’s visible to the naked eye and relatively easy to find. But it’s also attracting the intense interest of scientists, who are using a wide assortment of telescopes and astronomical satellites to better understand these enigmatic explosions.”
Though related scientifically to certain kinds of supernovae, this is not a supernova. Nonetheless, it is rare for these events to be bright enough to be visible to the naked eye. Go outside tonight and take a look!
Formation flying in space, without propellants.
Formation flying in space, without propellants.
Electromagnetic formation flight (EMFF) gets around this propellant problem by turning the satellites in a formation into electromagnets. By using a combination of magnets and reaction wheels, spacecraft in formation can move and change their attitude and even spin without propellant. Satellites can change their polarity to attract or repel one another, turn, or shift their relative positions in any manner that doesn’t require changing the center of gravity for the entire formation.
A prototype is going to be tested inside ISS in the near future.
Scientists have assembled a movie of one Martian moon eclipsing another, taken from Curiosity.
Scientists have assembled a movie of one Martian moon eclipsing another, taken from Curiosity.
Video below the fold.
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The engineering tests to try to save Kepler have found that the mission is essentially over.
The engineering tests to try to save Kepler have found that the mission is essentially over.
A headline at this New York Times article, “NASA’s Kepler Mended, but May Never Fully Recover” is wrong, as the telescope has not been “mended.” They have found they might be able to do some limited science, at the most. NASA is going to review this possibility, weighing the cost versus the benefit, and decide in the fall.
Scientists today published a new model that suggests that Voyager 1 actually entered interstellar space in July of last year.
Ad astra: Scientists today published a new model that suggests that Voyager 1 actually left the solar system and entered interstellar space in July of last year.
In describing on a fine scale how magnetic field lines from the sun and magnetic field lines from interstellar space can connect to each other, they conclude Voyager 1 has been detecting the interstellar magnetic field since July 27, 2012. Their model would mean that the interstellar magnetic field direction is the same as that which originates from our sun.
Other models envision the interstellar magnetic field draped around our solar bubble and predict that the direction of the interstellar magnetic field is different from the solar magnetic field inside. By that interpretation, Voyager 1 would still be inside our solar bubble.
This new model might very well explain the conflicting data received from the spacecraft, some of which said it was out of the solar system and some of which said it was not.
Comet ISON has come out from behind the Sun, and it looks like it will not produce a grand show for us later this year.
Comet ISON has come out from behind the Sun, and it looks like it will not produce a grand show for us later this year.
There will be a lot of stupid commentary criticizing astronomers for hyping this comet, all unfair. The comet had the strong possibility of being spectacular. Astronomers pointed that out, being as hopeful as everyone to see a bright and beautiful comet grace our night skies for a few months. That this is not turning out to be so is not their fault.
A rally today in DC about the threat of global warming, organized by Obama’s Organizing for America, had no attendees.
Fail: A rally today in DC about the threat of global warming, organized by Obama’s Organizing for America, had no attendees.
A climate scientist demands neutrality from climate scientists.
Pigs fly! A climate scientist demands political neutrality from climate scientists.
I believe advocacy by climate scientists has damaged trust in the science. We risk our credibility, our reputation for objectivity, if we are not absolutely neutral. At the very least, it leaves us open to criticism. I find much climate scepticism is driven by a belief that environmental activism has influenced how scientists gather and interpret evidence. So I’ve found my hardline approach successful in taking the politics and therefore – pun intended – the heat out of climate science discussions.
They call me an “honest broker”, asking for “more Dr Edwards and fewer zealous advocates”. Crucially, they say this even though my scientific views are absolutely mainstream.
But it’s not just about improving trust. In this highly politicised arena, climate scientists have a moral obligation to strive for impartiality. We have a platform we must not abuse. For a start, we rarely have the necessary expertise. I absolutely disagree with Gavin that we likely know far more about the issues involved in making policy choices than [our] audience.
She might believe in human-caused global warming, but she also has the sense to recognize the vast uncertainties and political difficulties involved in this issue. The full title of her blog, All Models are Wrong is “All models are wrong, but some are useful. A grownup discussion about how to quantify uncertainties in modeling climate change and its impacts, past and future.”
“What causes the Sun’s magnetic field flip?”
The uncertainty of science: “What causes the Sun’s magnetic field flip?”
The answer: We don’t really know! An excellent article by Mike Wall detailing the unknowns behind the Sun’s magnetic field and the sunspot cycle.
Modern Journalism: Retyping press releases
This post is really about the monthly NOAA update of the solar cycle, but before I do that, I must note some really bad science journalism in connection with that solar minimum.
This week NASA released a poorly written press release describing how the Sun’s magnetic field flips whenever it goes through solar maximum, the period when sunspot activity reaches its maximum. The article gave the incorrect impression that this “flip” will be some grand singular and spectacular event and when it happens the consequences to Earth could be significant. Then it buried this most important little detail to the article’s final paragraphs:
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An inspector general report has found that the 24 health co-ops formed under Obamacare are going bankrupt, even before they have opened.
Our government at its best: An inspector general report has found that the 24 health co-ops formed under Obamacare are going bankrupt, even before they have opened to their first customers.
And that’s not all:
Examiner Watchdog investigative reporting project focused on the co-ops began in 2012 and has since uncovered extensive evidence of financial mismanagement, conflicts of interest, failure to file required tax returns, inadequate capitalization and evasion of public disclosure requirements such as the federal Freedom of Information Act. A recent Examiner survey found, for example, that all but one of the 24 co-ops failed to file required tax returns, and several may invoke a highly questionable loophole allowing them to avoid doing so in the future. Even more troubling, two of the co-op loans were awarded to organizations headed by individuals with questionable backgrounds, the Examiner has learned, including an insider trading conviction and a history of child sexual abuse.