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" Eis o que passei internamente esta segunda-feira (01/06/2015):
John
Dr. John P. Holdren
Director, Office of Science and Technology Policy
The White House
the President's Chief Science Advisor." Eis o que passei internamente esta segunda-feira (01/06/2015):
O relatório de hoje de manhã da NASA Hubble contém uma foto eu pensei vale a pena compartilhar. A densidade surpreendente de estrelas - a maioria dos quais, sabemos agora, têm planetas - realmente faz uma maravilha se não há mais ninguém lá fora. E este é apenas um pedaço de nossa própria galáxia. Há uma estimativa de 100 bilhões de outras galáxias no universo observável. Divirta-se! "
My best,John
Dr. John P. Holdren
Director, Office of Science and Technology Policy
The White House
Hubble Peers into the Most Crowded Place in the Milky Way
This NASA/ESA Hubble Space Telescope image presents the Arches Cluster, the densest known star cluster in the Milky Way. It is located about 25,000 light-years from Earth in the constellation of Sagittarius (The Archer), close to the heart of our galaxy, the Milky Way. It is, like its neighbor the Quintuplet Cluster, a fairly young astronomical object at between two and four million years old. The Arches cluster is so dense that in a region with a radius equal to the distance between the sun and its nearest star there would be over 100,000 stars! At least 150 stars within the cluster are among the brightest ever discovered in the Milky Way.
These stars are so bright and massive that they will burn their fuel within a short time (on a cosmological scale that means just a few million years). Then they will die in spectacular supernova explosions. Due to the short lifetime of the stars in the cluster the gas between the stars contains an unusually high amount of heavier elements, which were produced by earlier generations of stars.
This NASA/ESA Hubble Space Telescope image presents the Arches Cluster, the densest known star cluster in the Milky Way. It is located about 25,000 light-years from Earth in the constellation of Sagittarius (The Archer), close to the heart of our galaxy, the Milky Way. It is, like its neighbor the Quintuplet Cluster, a fairly young astronomical object at between two and four million years old. The Arches cluster is so dense that in a region with a radius equal to the distance between the sun and its nearest star there would be over 100,000 stars! At least 150 stars within the cluster are among the brightest ever discovered in the Milky Way.
These stars are so bright and massive that they will burn their fuel within a short time (on a cosmological scale that means just a few million years). Then they will die in spectacular supernova explosions. Due to the short lifetime of the stars in the cluster the gas between the stars contains an unusually high amount of heavier elements, which were produced by earlier generations of stars.
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