Less Dark Matter in Young Galaxies?

A new study of six young, star-forming galaxies suggests they’re less influenced by dark matter than expected. But the results may say more about galaxy evolution than about the nature of dark matter.

Galaxy rotation curves

This artist’s impression compares rotating disk galaxies in the distant universe (right) and the present

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La moindre influence de la matière noire au sein…

eso1709fr — Communiqué de presse scientifique

Des observations de galaxies distantes effectuées au moyen du VLT suggèrent la prédominance de la matière ordinaire

15 mars 2017

De nouvelles observations suggèrent que les galaxies massives, à taux de formation stellaire élevé et datées de 10 milliards d’années, soit de l’âge d’or

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Swift Black Hole Winds May Shape Galaxy

Winds that charge away from supermassive black holes at a fraction of the speed of light have long been mysterious and even contentious. Now, new evidence sheds light on their origins.

Black hole winds

This artist’s impression illustrates a supermassive black hole with X-ray emission emanating from its inner region (pink) and ultra-fast

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Bright Mound on Ceres Due to Briny Eruptions?

The strange bright deposits inside Occator crater on Ceres are probably from cryovolcanic eruptions that are much younger than the crater itself.

White spots on Ceres

White spots dot the floor of Occator, a crater on Ceres that’s 92 km (57 miles) across. NASA’s Dawn spacecraft has seen haze inside the crater that appears

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A New Take on the Audible Meteor Mystery

A recent study suggests a plausible mechanism to explain why observers sometimes hear superbright meteors at the same time that they see them.

Fireball over ALMA

A brilliant fireball captured over the Atacama Large Millimeter/submillimeter Array (ALMA) located on the Chajnantor Plateau in the Chilean Andes.

ESO/C. Malin

Having a bad hair day?

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Seven-Planet Star Hides Age, Might Be Deadly

The star with seven exoplanets puts out enough high-energy radiation to tear away the inner planets’ atmospheres in a few billion years.

TRAPPIST-1 system

Diagram of the planetary system around TRAPPIST-1. The sizes of the objects are to scale, but the distances have been reduced tenfold. The star’s color is realistic. The

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news copernic


Bonjour à tous,

Aujourd’hui l’Association Copernic met en place sa « newsletter mensuelle » pour mieux vous informer. Nous espérons que cette nouvelle présentation vous conviendra. Vous pouvez nous aider par vos avis et conseils à en faire un excellent moyen de communication…

Marie-Pierre sera notre conférencière le mardi 7 Lire la suite