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3 concerns: Hsin-Yu Chen on treading gently whenever dating the world

3 concerns: Hsin-Yu Chen on treading gently whenever dating the world

3 concerns: Hsin-Yu Chen on treading gently whenever dating the world

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We’re not exactly yes exactly exactly just how old our company is — cosmologically, that is. The methods that are main used to assess the chronilogical age of the universe don’t agree with one another. Numerous physicists wish a newly relevant method that includes gravitational-wave findings will re re solve this age discrepancy for good.

But this technique that is new never be because simple as scientists hoped. a paper that is new Hsin-Yu Chen, a postdoc in the MIT Kavli Institute for Astrophysics and Space analysis, defines a possible issue with all the method that, if you don’t addressed, could catastrophically compromise its outcomes.

Right Here, Chen answers questions regarding the brand new technique, the problem she unearthed, and exactly just exactly what scientists should do to resolve it. Her responses have now been modified for clarity and length.

Q: so how exactly does the method that is new dating the world work?

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A: Observing gravitational-wave sources can give us an unbiased approach to gauge the chronilogical age of the world. To show its age, we have to fast know how the universe is expanding. Also to find this expansion price, we should understand a couple of things: how long away are cosmic systems like galaxies, and exactly how fast they have been traveling far from us.

Making use of telescopes, it is possible to measure exactly how fast these galaxies move far from us, but it is hard to measure their distance. But once observing gravitational-waves signals, it’s the other means around: we are able to determine distance directly through the gravitational-wave observation, however it’s difficult to measure just how fast these gravitational-wave sources are traveling far from us. Leer más Acerca de3 concerns: Hsin-Yu Chen on treading gently whenever dating the world