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Results 101 - 107 of 107.


Astronomy / Space - Earth Sciences - 31.03.2016
The Moon thought to play a major role in maintaining Earth's magnetic field
The Moon thought to play a major role in maintaining Earth’s magnetic field
The Earth's magnetic field permanently protects us from the charged particles and radiation that originate in the Sun. This shield is produced by the geodynamo, the rapid motion of huge quantities of liquid iron alloy in the Earth's outer core. To maintain this magnetic field until the present day, the classical model required the Earth's core to have cooled by around 3 000 °C over the past 4.3 billion years.

Astronomy / Space - Physics - 16.03.2016
“A source accelerating Galactic cosmic rays to unprecedented energy discovered at the centre of the Milky Way”
“A source accelerating Galactic cosmic rays to unprecedented energy discovered at the centre of the Milky Way”
For more than ten years the H.E.S.S. observatory in Namibia, run by an international collaboration of 42 institutions in 12 countries, has been mapping the centre of our galaxy in very-high-energy gamma rays. These gamma rays are produced by cosmic rays from the innermost region of the Galaxy.

Astronomy / Space - Physics - 11.03.2016
Gravitational Waves, a new way to explore the Universe
Gravitational Waves, a new way to explore the Universe
On 14 September 2015, gravitational wave detectors from the LIGO/VIRGO collaboration observed a signal from the coalescence of two black holes with masses of 36 and 29 solar masses at a distance of about 1.3 billion light-years. This extraordinary discovery opens the way in astronomy to study gravitational waves.

Astronomy / Space - Physics - 09.03.2016
Rosetta: type of ice reveals the age of comets
Rosetta: type of ice reveals the age of comets
The ice buried inside comet 67P/ Churyumov-Gerasimenko is mainly found in crystalline form, which implies that it originated in the protosolar nebula and is therefore the same age as the Solar System. This discovery was made by an international team led by a researcher at the LAM 1 (CNRS/Aix Marseille Université) and also including scientists from the Laboratoire J.-L.

Astronomy / Space - Earth Sciences - 02.03.2016
Great tilt gave Mars a new face
Great tilt gave Mars a new face
The surface of the planet Mars tilted by 20 to 25 degrees 3 to 3.5 billion years ago. This was caused by a massive volcanic structure, the Tharsis volcanic dome 1 , which is the largest in the Solar System.

Astronomy / Space - 23.02.2016
Searching for Planet 9
Searching for Planet 9
Using observations from the Cassini spacecraft, a team of French astronomers from the Institut de mécanique céleste et de calcul des éphémérides (Observatoire de Paris / CNRS / UPMC / université Lille 1), and the laboratory GeoAzur (Observatoire de la Côte d'Azur / CNRS / Université de Nice-Sophia Antipolis / IRD) have been able to specify the possible positions of a ninth planet in the Solar System.

Astronomy / Space - Physics - 11.02.2016
Gravitational waves detected 100 years after Einstein's prediction
Gravitational waves detected 100 years after Einstein’s prediction
LIGO opens New Window on the Universe with Observation of Gravitational Waves from Colliding Black Holes. For the first time, scientists have observed ripples in the fabric of spacetime called gravitational waves, arriving at the Earth from a cataclysmic event in the distant universe. This confirms a major prediction of Albert Einstein's 1915 general theory of relativity and opens an unprecedented new window onto the cosmos.