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.
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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.

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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.

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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.

β€œNova Delphini 2013 is among the 30 brightest novae ever recorded,” says S&T editor in chief Robert Naeye. β€œIt’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!

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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.

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