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.
A union strike has shut down the new ALMA telescope array in Chile.
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.
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.
This decision raises two thoughts.
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?
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!
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.
A star that went nova last week is now visible to the naked eye.
βNova Delphini 2013 is among the 30 brightest novae ever recorded,β says S&T editor in chief Robert Naeye. βItβs a wonderful target for backyard observers, given that itβs visible to the naked eye and relatively easy to find. But itβs also attracting the intense interest of scientists, who are using a wide assortment of telescopes and astronomical satellites to better understand these enigmatic explosions.β
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.
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.
Video below the fold.
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