apr 072014
Anne's Image of the Day: Galaxy Cluster Abell 1689

  April 7, 2014 Abell 1689, a galaxy cluster in Virgo Image Credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA), J. Blakeslee (NRC Herzberg Astrophysics Program, Dominion Astrophysical Observatory), and H. Ford (JHU) Abell 1689 is a galaxy cluster of some 2 million light-years across, located almost 2.5 billion light-years away in the constellation of [continue reading]

dec 122013
Anne's Image of the Day: Galaxy Cluster Abell 1703

December 12, 2013 Abell 1703, a massive galaxy cluster Image Credit: NASA, ESA, and Johan Richard (Caltech, USA) Acknowledgement: Davide de Martin & James Long (ESA/Hubble) Abell 1703 is a massive galaxy cluster located some 3 billion light-years away from the Earth in the northern celestial hemisphere. It is speeding away from us at about [continue reading]

okt 262013
The Deepest Probe of the Universe Ever

  NASA’s Great Observatories are teaming up to look deeper into the Universe than ever before. With a boost from natural “zoom lenses” found in space, they should be able to uncover galaxies that are as much as 100 times fainter than what the Hubble, Spitzer, and Chandra space telescopes can typically see. Abell 2744 [continue reading]

okt 172012
Massive Galaxies See Big Meals and Snacks in Other Galaxies

  Gravity Lenses Suggest Big Collisions Make Galaxies Denser   Using gravitational “lenses” in space, University of Utah astronomers discovered that the centers of the biggest galaxies are growing denser – evidence of repeated collisions and mergers by massive galaxies with 100 billion stars. This image, taken by the Hubble Space Telescope, shows a ring [continue reading]

mrt 172012
Astronomers Using NASA's Hubble Discover Quasars Acting as Gravitational Lenses

Astronomers using NASA’s Hubble Space Telescope have found several examples of galaxies containing quasars, which act as gravitational lenses, amplifying and distorting images of galaxies aligned behind them. Quasars are among the brightest objects in the universe, far outshining the total starlight of their host galaxies. Quasars are powered by supermassive black holes. Image Credit: [continue reading]