ncbi.nlm.nih.gov mailing list memberships reminder

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NASA Signs Scientific and Education Agreements with Brazil

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NASA Signs Scientific and Education Agreements with Brazil
06/30/2015 04:17 PM EDT

NASA Administrator Charles Bolden and Brazilian Space Agency (AEB) President José Raimundo Braga Coelho have signed agreements to further research into heliophysics and space weather and to enhance global climate study and educational opportunities.

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European Space Agency Flickr Update

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Comet activity, 21 June
30-06-2015 03:40 PM CEST

europeanspaceagency posted a photo:

Comet activity, 21 June

On 13 August 2015, Comet 67P/Churyumov–Gerasimenko will reach its closest point to the Sun along its 6.5-year long orbit. It will be around 185 million km from the Sun at ‘perihelion’, between the orbits of Earth and Mars.

ESA’s Rosetta mission reached the comet on 6 August 2014, and has been accompanying it ever since, monitoring the evolution of the nucleus and its surrounding atmosphere, or coma.

The nucleus is a mixture of frozen ices and dust. As the comet approaches the Sun, solar light warms its surface, causing the ices to boil away. This gas streams away carrying along large amounts of dust, and together they build up the coma.

This image was obtained with Rosetta’s navigation camera on 21 June 2015, when the spacecraft was 177 km from the comet centre.

Parts of the nucleus are lit by sunlight, revealing the variety of terrains that are found on this curious object. The diffuse luminosity, produced by the comet’s activity, is visible all around the nucleus, but appears especially striking in the upper part of the image.

The small lobe of this oddly shaped comet, visible at the top left in this orientation, is crowned by several jets of outflowing material, streaming into space from the surface.

Signs of activity are also visible around the ‘neck’ region that connects the two lobes, set against cliffs that are cast in shadow.

The comet’s large lobe, to the bottom right, reveals the rich morphology of the nucleus, with rugged terrains, circular features and smoother portions punctuated by boulders.

Rosetta will keep observing how the comet’s activity evolves in the lead up to perihelion, and for a full year after that, until the end of the mission in September 2016.

This image is published for the first time in today’s CometWatch on the Rosetta blog.

Credit: ESA/Rosetta/NavCam – CC BY-SA IGO 3.0

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Raumschiff Erde

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Raumschiff Erde
30-06-2015 04:52 PM CEST

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Wohin reist unser Raumschiff Erde? ESA-Astronaut Alexander Gerst präsentierte seine ISS-Mission im vollen HR-Sendesaal in Frankfurt. Experten diskutierten im Anschluss die Erd- und Umweltbeobachtung aus dem All. Mehr dazu hier.

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NASA Ames Research Center News and Features Update

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SOFIA in the Right Place at the Right Time for Pluto Observations
06/29/2015 04:05 PM EDT

In a special celestial event visible only from the Southern Hemisphere, Pluto passed directly between a distant star and the Earth on the morning of June 30, New Zealand time (June 29 in the U.S.).

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Helping Europe prepare for asteroid risk

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Helping Europe prepare for asteroid risk
30-06-2015 03:02 PM CEST

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Each year, astronomers worldwide discover over 1000 new asteroids or other space rocks that could strike our planet. And if one is spotted heading towards Earth, experts working in ESA and national emergency offices need to know who should do what, and when.

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