When galaxies switch off: Some galaxies hit a point in their lives when their star formation is snuffed out, and they become "quenched". Quenched galaxies in the distant past appear to be much smaller than the quenched galaxies in the Universe today. This has always puzzled astronomers — how can these galaxies grow if they are no longer forming stars? A team of astronomers has now used a huge set of Hubble observations to give a surprisingly simple answer to this long-standing cosmic riddle.
National Museum of African Art Presents “African Cosmos: Stellar Arts” “African Cosmos: Stellar Arts” will be on view at the Smithsonian’s National Museum of African Art from June 20 through Dec. 9. This is the first major exhibition exploring the historical legacy of African cultural astronomy and its intersection with traditional and contemporary African arts.
Dark Matter Core Defies Explanation Astronomers using data from NASA's Hubble Telescope have observed what appears to be a clump of dark matter left behind from a wreck between massive clusters of galaxies. The result could challenge current theories about dark matter that predict galaxies should be anchored to the invisible substance even during the shock of a collision.
Read more... 03-02-12
Dark and bright: ESA chooses next two science missions The powerful influence of the Sun and the nature of the mysterious 'dark energy' motivate ESA’s next two science missions. Solar Orbiter and Euclid were selected today by ESA's Science Programme Committee for implementation, with launches planned for 2017 and 2019.
Read more... 10-04-11