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Thursday, Dec 2, 1999 5:00 PM UTC1999-12-02T17:00:00Zl, M j, Y g:i A T

Master of the universe

With the existence of six new planets announced just this week, Geoffrey Marcy is racking up "extrasolar" discoveries like Mark McGwire racks up homers.

Master of the universe
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Pick your favorite image of an extraterrestrial. Perhaps it’s a stumpy green guy with red eyes and purple antennae. Maybe it’s that sleek alien with a huge forehead and black eyes that earthlings put on bumper stickers and key chains. It could be Jabba the Hut or Marvin the Martian. Doesn’t matter. Imagine he’s sitting on, say, the third rock from some star 30 light-years away (the distance of 7 trillion marathons) and peering at the light from our own sun through a powerful telescope. The question is: Can he see us?

No, no and no. He cannot see us. To him, the sun is just a pinprick of light, and the Earth and its eight fellow planets are too dim and too close to our star to resolve. The kind of vision needed to see us would be equivalent to us being able to see someone on Neptune drop a quarter; our green friend Marvin would need a telescope the size of his solar system to actually see the Earth.

So the fact that Berkeley, Calif., astronomer Geoffrey Marcy has been able to detect planets around other stars is, simply, amazing — both as a technological feat for modern earthlings and as a cosmological double take. Scientists once assumed Earth was a unique locus for life in the universe, but the more planets Marcy finds, the more likely it seems that there are real extraterrestrials out there sitting on them. Forget the science fiction; they may soon be fact.

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William Speed Weed is a freelance writer and radio producer living in San Francisco.  More William Speed Weed

Saturday, Jan 21, 2012 4:00 PM UTC2012-01-21T16:00:00Zl, M j, Y g:i A T

Rise of the Super-Earths

Astronomers have discovered a giant new kind of planet that could hold life -- and they could change everything

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This article is an adapted excerpt from the upcoming book, "The Life of Super-Earths," available on January 23 from Basic Books.

We love our planet Earth. We should — it is our home, and there’s no place like home. There can’t ever be a better place than Earth. Plenty of serious science literature supports that view in an emotionally detached manner. It is often called the “Goldilocks hypothesis”: the Earth is just the right size (not too big, not too small) and just the right temperature (not too hot, not too cold) for life to emerge here. Life is a rare thing. Perched on our little planet, we can’t see any other out there, or at least not yet — so a certain dose of Earth-centrism seems justified. Or is it?

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Dimitar Sasselov is a professor of astronomy at Harvard University and the founder and director of the Harvard Origins of Life Initiative. His research has been covered by the New York Times, the Boston Globe and others. He lives in Boston, Mass.   More Dimitar Sasselov

Sunday, Dec 11, 2011 8:00 PM UTC2011-12-11T20:00:00Zl, M j, Y g:i A T

The science of warp

From time travel to interstellar communication, an expert explains what sci-fi gets right and wrong

time warp

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“Back to the Future,” “A Christmas Carol,” the “Terminator” series, “Star Trek,” “Rip Van Winkle,” “Hot Tub Time Machine,” “Terra Nova” — the list goes on. We, as a culture, have been mesmerized by the idea of traveling in time: going back to fix life-changing mistakes we regret; going forward to get a sneak preview at what we’ll become. Equally transfixing is the notion of traveling through space, exploring galaxies and unknown universes far beyond our sight’s reach.

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Sunday, Dec 4, 2011 8:00 PM UTC2011-12-04T20:00:00Zl, M j, Y g:i A T

The Internet: Triumph of human evolution

The Web is more than just a powerful tool, it's our greatest adaptation. An expert explains why

brain

 (Credit: RATOCA via Shutterstock)

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The Internet allows us to do all kinds of things we never imagined possible. It lets us communicate with people across the world. We can learn whatever we want at the click of a button. We can navigate roads using our iPhones, and translate languages within seconds. It makes us smarter, and more versatile, and faster than ever. But the Web isn’t just a truly extraordinary invention, it is the apex of human evolution — and the ultimate evolutionary adaptation.

It may seem strange to think of the Web as part of the process of natural selection, but Raymond Neubauer, a professor at the University of Texas, doesn’t think so. In his far-reaching new book, “Evolution and the Emergent Self,” he argues that technology should be seen as part of our planet’s grand evolutionary narrative. He claims that two evolutionary strategies — one, emphasizing simplicity and rapid reproduction (as in bacteria), and the other, emphasizing complexity and hyper-intelligence (as in humans) — have been hugely successful in dominating the planet. The book charts the ways those strategies have managed to pop up everywhere from the animal kingdom to cellphones.

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Thomas Rogers is Salon's deputy arts editor.   More Thomas Rogers

Tuesday, Aug 18, 2009 10:16 AM UTC2009-08-18T10:16:00Zl, M j, Y g:i A T

How to kill a coal plant

As a recent British protest shows, nonviolent civil disobedience may be our best hope to counteract global warming

How to kill a coal plant

In the early morning of Oct. 8, 2007, a small group of British Greenpeace activists slipped inside a hulking smokestack that towers more than 600 feet above a coal-fired power plant in Kent, England. While other activists cut electricity on the plant’s grounds, they prepared to climb the interior of the structure to its top, rappel down its outside, and paint in block letters a demand that Prime Minister Gordon Brown put an end to plants like the Kingsnorth facility, which releases nearly 20,000 tons of carbon dioxide into the atmosphere each day.

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Mark Engler, a writer based in New York City, is an analyst with Foreign Policy In Focus. He can be reached via the web site http://www.democracyuprising.com.  More Mark Engler

Saturday, Aug 8, 2009 10:08 AM UTC2009-08-08T10:08:00Zl, M j, Y g:i A T

Neighborhood watch on planet Earth

We need to keep going to space to know what's happening down here

The two images portray changes in the timing of coastal sea ice breakup (information recorded over long periods). Top: July 2006, Chukchi Sea. Bottom: July 2007, Chukchi Sea

The two images portray changes in the timing of coastal sea ice breakup (information recorded over long periods). Top:

July 2006, Chukchi Sea. Bottom: July 2007, Chukchi Sea

For a bit of change, let’s talk about a different kind of health care reform — the kind that affects the health of the planet.

The other evening, I was listening to “All Things Considered” on NPR. Robert Siegel was interviewing Dr. Hal Levison, a planetary scientist at the Southwest Research Institute in Boulder, Colo., about the king-size comet that slammed into Jupiter a few weeks ago.

The comet’s impact — it punched a hole the size of the Pacific Ocean, and would have annihilated a lesser planet, like Earth — was discovered by an amateur astronomer in Australia. Siegel asked how such an event escaped the notice of the world’s great observatories.

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Michael Winship is senior writing fellow at Demos and a senior writer of the new series, Moyers & Company, airing on public television.   More Michael Winship

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