Tag: science

Something keeps coming and going in a sea on Titan

11:14 am

Cassini images taken in 2007, 2013, and 2014 of one of Titan’s largest hydrocarbon seas find that a mysterious feature there keeps appearing and disappearing.

The mysterious feature, which appears bright in radar images against the dark background of the liquid sea, was first spotted during Cassini’s July 2013 Titan flyby. Previous observations showed no sign of bright features in that part of Ligeia Mare. Scientists were perplexed to find the feature had vanished when they looked again, over several months, with low-resolution radar and Cassini’s infrared imager. This led some team members to suggest it might have been a transient feature. But during Cassini’s flyby on August 21, 2014, the feature was again visible, and its appearance had changed during the 11 months since it was last seen.

Scientists on the radar team are confident that the feature is not an artifact, or flaw, in their data, which would have been one of the simplest explanations. They also do not see evidence that its appearance results from evaporation in the sea, as the overall shoreline of Ligeia Mare has not changed noticeably. The team has suggested the feature could be surface waves, rising bubbles, floating solids, solids suspended just below the surface, or perhaps something more exotic.

That the seasons are slowly changing on Titan is probably contributing to the transient nature of this feature.

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The planet debate continues

8:22 am

In a public debate about the scientific definition of a planet, the IAU’s definition, imposed about eight years ago to expressly prevent Pluto from being called one, was soundly defeated when the votes were counted.

Science historian Dr. Owen Gingerich, who chaired the IAU planet definition committee, presented the historical viewpoint. Dr. Gareth Williams, associate director of the Minor Planet Center, presented the IAU’s viewpoint [which is the definition that is presently considered official by scientific bureaucrats]. And Dr. Dimitar Sasselov, director of the Harvard Origins of Life Initiative, presented the exoplanet scientist’s viewpoint.

Gingerich argued that “a planet is a culturally defined word that changes over time,” and that Pluto is a planet. Williams defended the IAU definition, which declares that Pluto is not a planet. And Sasselov defined a planet as “the smallest spherical lump of matter that formed around stars or stellar remnants,” which means Pluto is a planet.

After these experts made their best case, the audience got to vote on what a planet is or isn’t and whether Pluto is in or out. The results are in, with no hanging chads in sight.

According to the audience, Sasselov’s definition won the day, and Pluto IS a planet.

Notice that two of the three debaters considered Pluto a planet even before the vote was taken. Notice also that the first debater, Gingerich, was on the very committee that the IAU had created to come up with a definition and then ignored completely when its definition decided that Pluto was a planet.

In the end, it will be the people who speak the language that will decide, not IAU bureaucrats. This little public relations event and vote tells me that the bureaucrats will lose.

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“They want to start taking — now.”

12:33 am

The two stories linked below, describing what it was like at Sunday’s People’s Climate March in New York, confirm for me what I had surmised from earlier reports prior to the march, that the march was a leftwing get-together with its central goal to use the climate as an excuse to impose leftist and communist redistributionist policies on the free citizens of America.

My headline is a quote from the second article. The full quote:

Put it all together — all the justice demanders, the tax Wall Streeters, and the spirit of Occupy symbolized by the angry pacifist — and the People’s Climate March was one long, loud, loosely organized demand that vast sums of money be taken from the wealthy and given to the clients of the coalitions and alliances and networks and task forces that make up today’s environmental justice movement. They’ve had enough of debating climate models. They want to start taking — now.

Lord help us, in that we have already tragically allowed many of these people to wield significant amounts of power, and they are using that power to impose their agenda on us all.

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MAVEN enters Mars orbit

7:25 pm

Upon completion of its engine burn this evening at 10:10 pm (eastern), MAVEN successfully entered Mars orbit.

Stephen Clark’s status updates on Spaceflight Now were accurate, informative, and right on the money. The live telecast on NASA-TV was confusing, idiotic, distracting, and uninformed. They never once announced when the engine burn had started, ignored the reactions of the people in the control room when they cheered some important event, and spent a lot of time discussing facts that were irrelevant to this event, which is “Will MAVEN achieve orbit!?” Worst of all, the male “anchor” was clearly ignorant of the mission while the female “anchor” spoke in a sing-song manner as if her audience were kindergarten toddlers who needed careful herding. All in all, it was embarrassing to watch.

They did manage to shut up just in time to catch the announcement from mission control that telemetry had confirmed that MAVEN had reached orbit. They then went back to chattering about irrelevant stuff. As I said, embarrassing.

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Antarctic sea ice extent largest on record

12:12 am

The uncertainty of science: Even as global warming protesters gather in New York to push their political agenda and fear-monger the threat of global warming, the Antarctic ice cap has set a record for its greatest extent ever measured.

No one really has a convincing explanation for why the south pole ice cap is so large even as the north pole ice cap remains relatively small (though recovering from the record lows from earlier in this century).

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Ocean surface wind speeds declining

10:35 pm

The uncertainty of science: Data now shows that surface wind speeds over the oceans have declined in the past three years, and that August 2014 has the lowest average since 1989.

The author of the article says that these low wind speeds might explain why ocean surface temperatures have recently been high, He also admits he really has no idea. And are these variations because of global warming? No one has the slightest idea. To claim otherwise is to be an advocate not a scientist. As far as we know with the available data, these variations could simply be result of natural cycles.

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The next week in space

2:09 pm

For the next week there are going to be a number of important events that will determine the success or failure of a number of important space missions. I thought I’d lay out the schedule in a quick post, just to make it clear.

  • Falcon 9 launch: SpaceX is hoping to launch its Dragon capsule to ISS tonight at 2:14 am (eastern). If they are successful, it will be the fourth Falcon 9 launch since July 14. That is a very fast-paced launch schedule, as good as any other launch company’s, and more evidence that SpaceX is an effective competitor in the resurgent launch market.
  • Mavin orbital insertion: NASA hopes to place this Mars mission into orbit on Sunday at around 9:50 pm (eastern).
  • India’s Mars Orbiter Mission (MOM), also known as Mangalyaan: There are two important events this week for this mission. First, on Monday, September 22, engineers will do a test firing of the spacecraft’s engine, which has been inactive for the last several months during its cruise to Mars. If that firing is successful, they will do the orbital insertion burn on Wednesday, September 24.

So, stay tuned this week for some fun stuff. And as I’ve been saying, this is only the beginning.

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Why is Wikipedia deleting all references to Neil Tyson’s quote fabrications?

11:02 am

Link here. Key quotes:

Judging by many of the responses to the three pieces I wrote detailing Neil Tyson’s history of fabricating quotes and embellishing stories, you’d think I had defamed somebody’s god. It turns out that fanatical cultists do not appreciate being shown evidence that the object of their worship may not, in fact, be infallible.

And this:

These lovers of science don’t actually love science, because science requires you to go where the evidence takes you, even if it goes against your original hypothesis. What many of Tyson’s cultists really like is the notion that one can become more intelligent via osmosis — that you can become as smart and as credentialed as Tyson by merely clapping like a seal at whatever he says, as long as what he says fits the political worldview of your average progressive liberal.

The author, Sean Davis, provides some juicy quotes from these individuals, who all seem unable to appreciate the importance of honesty, accuracy, and reliability when it comes to science and journalism.

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