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Meet PopSci's annual Brilliant 10--a selection of the brightest young researchers in the country. They're helping to keep us healthy, prevent disasters, and make green energy cheaper than coal. Lucky for us, our future is in their capable hands

Rising Star: A few of Marla Geha’s galaxy-hunting tricks: velocity calculations, 3 a.m. e-mails, and superstitious routines to ensure clear skies.  John B. Carnett

The Star Chaser

Brilliant because: She’s discovering nearly invisible galaxies circling our own, and the mysterious dark matter that dominates them

Name: Marla Geha
Age: 35
Affiliation: Yale University

Marla Geha has different job titles depending on who’s asking. “If I’m on a plane, I tend to be a physicist,” she says. “Then nobody wants to talk to me.” When she feels the need to impress someone, she’s an astrophysicist. And when she doesn’t mind a two-hour conversation, she tells them she’s an astronomer.

Geha is, in fact, all three. Now a professor at Yale, Geha spends her days (and, of course, nights) trying to identify faint galaxies that probably formed earlier than the Milky Way. Simulations of the Milky Way’s evolution predict that there are about 1,000 such formations. When Geha came on the scene five years ago, astronomers had found just 11 of them. She and others believed that more existed, hidden from view because the galaxies were made mostly of dark matter, the term for whatever it is out there that emits no light but somehow accounts for 90 to 95 percent of the universe’s entire mass.

In the quest to solve the so-called missing-satellite problem, Geha pored over digital maps of the sky, looking for areas with unexpected concentrations of stars. Then she painstakingly measured the velocity of each star. To her amazement, she found that the stars were moving too quickly for their size—tantalizing evidence that dark matter might be tugging on them.

So far, Geha and her team have discovered 14 galaxies. She hopes to find enough to verify the reigning theory of how the universe formed, and perhaps along the way help other fields fully define dark matter. “Astronomers and particle physicists don’t talk to each other much,” she says. In the future, she’ll be the one starting the conversation. —Doug Cantor

8 Comments

I enjoyed the article, but was disappointed at first, because whomever posted (or wrote) it, did not bother to proof read it. The subject person featured, is introduced as "Michael Strand (also under the photo), but the whole article is about Michael Strano. I assume, for research purposes, the latter is accurate.

I know how!
When I was litle saw Star Wars too, but I was impress from the flying machines and now I'm able to make "Snow-Speeder" for example!!! And I have some ideas for new materials and way for fly including revolutionary engines...
Need only MONEY!!!

Lextir: These are called "typos" in the language of writers. "Typo" stands for typographical error. Errors are often defined as "common mistakes". Mistaking the name Strano for Strand by someone writing headings and captions, (as opposed to the individual who wrote the report and, hopefully, did research sufficient to get the subject's name right) is not impossible. They are similar, and Strand is somewhat more common that Strano. Nor does it require an arrogant and supercilious response. Somebody made a mistake. We humans, most of the rest of us being mere mortals, do that on occasion.

Lextir, Observer is right. It was probably a typo. An example of poor proofing was kindly provided by Observer when he said, "We humans, most of the rest of us being mere mortals, do that on occasion."
If proofed, that statement would have benefited from hyphens rather than the use of commas to express his thoughts.

Well, typos aside, I enjoyed it. As a university teacher of writing and myself a writer, I can observe that the choice in the instance cited between commas and hyphens is a toin coss, really; not all rules of punctuation and grammar were written on the backside of the 10 Commandments, after all! ;-) A little individual choice is stilly permissable, even in, say, the MLW Stylesheet and the Chicago Manual of Style.

While realizing these young people are genuinely exceptional, they do provide encouragement that not *all* of us are lazy sloths (as I tend to be, so I'm looking in the mirror!).

Part of the excitement about the areas in which these folks are working is that any of those areas could yield applicable results in the wider world at lightening speed. (Of course, it may turn out that none of them work out for years or decades to come, or maybe not at all.)

But consider something I read online just yesterday: about 10 of today's better work fields didn't EXIST -- just six years ago. (No, I didn't do the research to verify that.)

Then there's the exponential growth in knowledge; call it "Moore's Law Writ Large," if you will. A desktop computer I bought in 1997 had more processing power than the entire Mission Control in Houston had when we landed the first men on the Moon -- and that's from NASA, which happened to have an article using my exact computer as a comparison, not from the manufacturer. And that's stunning.

Further, the people who are the subjects of this article will undoubtedly inspire even younger young, bright sparks who will light their own torches.

Sigh. Who am I to talk? MLA Stylesheet, not MLW!!!

I wish these fascinating articles would have more detail such as components of the robot and what the robot in the picture can actually do.

Me too. Unfortunately this site is more about making money, and itwould cost more to hire competent writers that are willing to flesh out a story with facts, pictures (useful ones not taken by Vinny), and explanations. Yes it is harder than regurgitating facts, but it is what people come here to read.

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