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PICARD

[Send to a friend] [Print] Picard Studying solar variability and its possible effects on Earth's climate There are already many satellites observing the Sun. Missions such as Cluster, Double Star, SOHO and STEREO are investigating the solar wind, solar flares and radiation, magnetic field, as ...

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Europe’s contribution to solar research

[Send to a friend] [Print] Europe's contribution to solar research Many partners SOHO, launched in 1995, is part of ESA's Horizon 2000 programme. It contributes to international scientific projects studying the relationship between the Sun and the Earth—STSP (Solar Terrestrial Science Progr ...

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Casolba, enhancing the quality of solar arrays

[Send to a friend] [Print] Casolba, enhancing the quality of solar arrays 8 August 2005 On 7 July 2005, CNES successfully completed the Casolba mission, an important flight in the balloon campaign conducted in Teresina, Brazil. The mission served to calibrate satellite solar cells in near-oper ...

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Particle flow from the Sun

[Send to a friend] [Print] Particle flow from the Sun What is the solar wind? The solar wind is the flow of gas and ionized particles resulting from the electromagnetic disturbances of the solar atmosphere, and emitted by the Sun into the interplanetary plasma. Magnetic arcs constantly inte ...

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Technical data

[Send to a friend] [Print] Technical data SOHO's strategic position The SOHO observatory is positioned between the Sun and the Earth, at a distance of 1,500,000 km from our planet. It orbits around one of the Lagrange points, where the gravitational forces of the Earth and the Sun are such ...

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Voyager missions: at the edge of the Solar System

[Send to a friend] [Print] Voyager missions: at the edge of the Solar System 15 June 2006 Launched nearly 30 years ago, the Voyager 1 space probe is now 100 times further from the Sun than Earth is, some 15 billion km away. With its twin Voyager 2, it is set to go past the edge of the Solar Sy ...

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ST - 2009: black hole with intermediate mass by XMM-NEWTON

[Envoyer à un ami] [Imprimer] Black hole with intermediate mass Update: 07/06/2009 A black hole of more than 500 times the Sun's mass was discovered. It is an intermediate one between the stellar and super-massive black holes. This " ...

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Pluto is no longer a planet

[Send to a friend] [Print] Pluto is no longer a planet 1 September 2006 At its General Assembly in Prague, the International Astronomical Union decided that Pluto should no longer be considered a planet in the Solar System. It shall now be classed in a new category of celestial objects called ...

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Discovering the Sun’s environment

[Send to a friend] [Print] Discovering the Sun's environment The Sun's internal structure The temperature at the Sun's core reaches 15 million degrees and is transmitted as electromagnetic waves, in the infrared, ultraviolet and X-ray spectra. This energy is progressively absorbed by the so ...

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CLUSTER

[Send to a friend] [Print] Cluster Understanding the interaction between the Sun and Earth Electrical power outages, loss of radio signals, and errors in navigation systems are all examples of phenomena that the Sun can cause, through the interaction of the solar wind - a stream of gas and par ...

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Back to the Sun

[Send to a friend] [Print] Back to the Sun 16 December 2004 The Sun and its impact on Earths climate is a topic of prime importance. The Picard project was first proposed in 1998 by the aeronomy laboratory of the French national scientific research centre (SA/CNRS). On 3 December, the CNES Bo ...

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SOHO

[Send to a friend] [Print] SOHO Solar observatory The Sun is the essential element of our environment. This formidable source of energy enabled life to develop on our planet and has shaped the evolution of its climate. As we see it from Earth, the Sun appears peaceful and benign. But close-up ...

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“Moscow, we have a problem!”

“Moscow, we have a problem!” [Send to a friend] [Print] [Damages on the Spektr module and the solar arrays after a collision. Crédits : NASA] [/img/2008/imageZoom.gif] Damages on the Spektr module and the solar arrays after a collision. Crédits : NASA 1997 was marred by a series of near-catastr ...

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Geostationary orbit

Geostationary orbit – a sensitive case in point [Send to a friend] [Print] As of 1 January 2009, there were 1,186 objects with a cross-section of more than 1 m catalogued in the geostationary region and its immediate vicinity. Of these, only 381 are operational satellites. Geostationary orbit ...

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Projet Cosmic Connexion

[Send to a friend] [Print] Connecting with the Cosmos 26 January 2006 In 1972, a plaque etched with pictograms designed to make contact with possible alien civilizations hitched a ride to the outer reaches of the Solar System on the Pioneer 10 probe. Today, French TV channel ARTE, in partners ...

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ROSETTA

[Send to a friend] [Print] Rosetta The Rosetta Stone of the Universe [The Rosetta Stone. Crédits : British Museum] [/img/2008/imageZoom.gif] The Rosetta Stone. Crédits : British Museum In 1799 in the Nile Delta, near the town of Rosetta, one of Napoleon's soldiers noticed a block of basalt in ...

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Exploring Saturn's systems

[Send to a friend] [Print] Exploring Saturn's systems What do we know about Saturn? Saturn formed about 4.5 billion years ago, or 100 million years after the solar system. It is a giant planet whose diameter is ten times that of the Earth's. It is also the least dense planet of the solar sy ...

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Earth

Earth [Send to a friend] [Print] Of medium size, Earth is the third planet from the Sun. It is unique among the terrestrial planets in having a large natural satellite, a strong magnetic field and, most importantly, life. The circumstances in which life emerged on Earth remain a mystery. Earth ...

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OERSTED

[Send to a friend] [Print] Oersted Probing deeper into Earth's magnetic field Earth's outer core is composed essentially of liquid iron. At 2,900 kilometres below the surface, this vast liquid ocean makes up 16% of the planet's volume and conducts electricity. Motions in the core are what gen ...

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Solar System exploration sets its sights on Mars and Mercury

[Send to a friend] [Print] Solar System exploration sets its sights on Mars and Mercury 7 December 2004 CNES's board of directors has taken another step forward in its Solar System exploration plans with the decision to take part in 2 new missions. The 1st will see Europe's Bepi-Colombo spac ...

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