Please create an account to participate in the Slashdot moderation system


Forgot your password?
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. ×

Submission + - Research finds normal matter distribution determines galaxy rotation (

Burz writes: "Galaxy rotation curves have traditionally been explained via an ad hoc hypothesis: that galaxies are surrounded by dark matter," said David Merritt, professor of physics and astronomy at the Rochester Institute of Technology, who was not involved in the research. "The relation discovered by McGaugh et al. is a serious, and possibly fatal, challenge to this hypothesis, since it shows that rotation curves are precisely determined by the distribution of the normal matter alone. Nothing in the standard cosmological model predicts this, and it is almost impossible to imagine how that model could be modified to explain it, without discarding the dark matter hypothesis completely."

The researchers plotted the radial acceleration observed in rotation curves published by a host of astronomers over the last 30 years against the acceleration predicted from the observed distribution of ordinary matter now in the Spitzer Photometry & Accurate Rotation Curves database McGaugh's team created. The two measurements showed a single, extremely tight correlation, even when dark matter is supposed to dominate the gravity.

Comment Re:Even bad its good (Score 1) 86

Shrug. There are bigger, better fights to pick than LED backlit TVs. DVRs. My Verizon DVR uses at least 32W all day and night long. That's about the same average energy usage as a present-day refrigerator. These things don't properly go to sleep, in a world of electronics that constantly sleep and wake on demand to save electricity.

That's the main reason I'm eager to see regulators stop the cable operators' monopoly over subscriber cable boxes. The boxes should become normal consumer electronics and use Energy Star ratings to compete against each other.

Comment Re:People, this is how the system works. (Score 1) 527

You may have a problem since research is getting swallowed up by private interests, -- Its not likely they will value basic research, though they still like to throw around the "job creating" slogans as justification for what is today the exact opposite.

People are conditioned to worship Technology. Most "innovation" and technology that finds its way into markets and patent offices these days is someone's money-making scheme. Their shit is paraded around as revolutionary when its really just useless stuff prone to breaking, against a background of dogged incrementalism. Usually, it heavily implies the ramping up of extractive industries, and more intensive financialization of (and spying on) our day to day lives.

Comment Re:GMOs (Score 1) 527

I guess we'll have to wait for those to come from America. In the meantime, studies about the relative safety of organic are starting to show up. Recently, they looked specifically for male birth defects and saw a significant benefit from organic dairy. Its not apples-to-apples, but it does indicate that suspicion of insufficiently tested Big Ag products is warranted.

Comment Re:GMOs (Score 1) 527

But pushing sugar doesn't even give cartel or monopoly power over a market the way GMOs often do. That's why some people are calling GE companies genetic pirates... they add a little something to traditional cultivars (or cutting edge hybrids) and then anyone planting the non-GE crops in the same region is under threat of legal action and crop confiscation.

Aside from the rather sad 'golden rice' poster child (which is unlikely to be able to compete with the humble carrot or many varieties of greens to provide vitamin A), so far the GE industry looks like an aggressive cartel carving up the market.

Slashdot Top Deals

With your bare hands?!?