Expert voices

Expert voices

Expert voices

In-depth analysis by experts on current scientific issues. In general, they are not as quick as the reactions.

What we have learned from the first image of Sagittarius A*

The first direct image of the black hole at the centre of our galaxy shows a 'monster' devouring matter at a slow pace. The black hole itself is spinning, and its spin axis is pointing just 30 degrees away from us. The result shows that the size of the black hole is proportional to the mass it contains, confirming the theory of general relativity. Xavier Barcons, ESO's Director General, assesses the new finding.

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We are not on track to limit the planet warming to 1.5ºC, but there is still hope

The latest IPCC report shows that we are not close to limiting the rise in temperatures to 1.5ºC. Fortunately, he points out that climate action in the form of policy and law has increased, and that there is hope to cut emissions by at least half by 2030. In this sense, the retrofitting of existing buildings and the adequate design of new ones will play a fundamental role.

 

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The International Space Station in the face of Russia's possible withdrawal

Today the International Space Station (ISS) is completely dependent on Russia to keep it in orbit. Space X spacecraft, which NASA contracts, carry astronauts but cannot propel the ISS to maintain its altitude. A new American spacecraft, Cygnus, which has already conducted a successful propulsion test, is expected to be able to do so.

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Europe moves step by step towards fusion as an energy source

The Joint European Torus (JET) has achieved a relevant scientific milestone related to energy production from nuclear fusion reactions. The results confirm some of the technological options selected for the large international ITER experiment. Spain has proposed to build a scientific facility in Granada to develop materials with which to build future reactors.

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