SCIENCE

Spanish planet hunter and “gravity spy” from Argentina on Top 10 Scientists list

Nature magazine hails work done by Guillem Anglada-Escudé and Gabriela González in 2016

Our small neighborhood in the universe, christened Laniakea , contains over 100,000,000,000,000,000 stars. The Sun is just one of them. And our closest neighboring star is Proxima Centauri, located 4.2 light years away. It was there, this past summer, that Spanish astronomer Guillem Anglada-Escudé and his team discovered the closest habitable world to Earth outside our solar system: Proxima b, an exoplanet that could be covered in water.

The astronomer Guillem Anglada-Escudé in Madrid last October.
The astronomer Guillem Anglada-Escudé in Madrid last October.

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This discovery has placed Anglada-Escudé, who teaches at Queen Mary University in London, on the list of Nature magazine’s “Ten People Who Mattered This Year.”

Born in Ullastrell, near Barcelona, in 1979, the astronomer acknowledges the praise “as the visible face of a team.”

His group is now trying to determine whether Proxima b transits in front of its star at a point visible from Earth, which would enable researchers to analyze its atmosphere and confirm whether there is water. If so, it would represent a watershed in space exploration.

This is acknowledgment of the work of over 1,000 scientists

Gabriela González, physicist

“If there is transit, it’s going to be a bombshell,” he predicts.

Gabriela González

Gabriela González, a physicist from Argentina who works at Louisiana State University, also made it into Nature’s list, where she is described as a “gravity spy.”

González is the spokesperson for the Laser Interferometer Gravitational-Wave Observatory (LIGO) experiment which saw two US-based observatories, on September 14, 2015, first detect signs of the gravitational waves predicted by Albert Einstein a century earlier.

On February 11, 2016, González and her team announced their discovery to the world.

“This is acknowledgment of the work of over 1,000 scientists,” she says.

Gravitational waves are vibrations in space-time. What González and her colleagues saw on September 14 was a deformation of space and time caused by a gravitational wave formed by two black holes clashing 1.3 billion years ago.

“This is just the beginning. We are going to continue discovering gravitational waves, star collisions, we will witness the birth of a black hole...We now have a new way of looking at the sky,” celebrates González, who was born in Córdoba (Argentina) in 1965.

English version by Susana Urra.

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