The Pinwheel Galaxy is one of the largest Galaxies yet discovered. At 170,000 light years in diameter it is nearly double the size of the Milky Way. The Pinwheel galaxy has a structure similar to that of the Milky Way being a spiral galaxy. It is believed to have a mass that is the equivalent of over 100 billion solar systems in its main disk and and 3 billion solar systems in its smaller bulge. The estimates on its distance from the Milky Way is between 20 million to 26 million light years.
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Nasa has released the first full colour mosaic from its Curiosity rover on the surface of Mars. Scientists have remarked that the rover's surroundings resembled parts of the southwestern US. Curiosity's ultimate goal is to drive towards a peak - informally known as Mount Sharp - to study its rocks. Shown in the mosaic is a section on the crater wall where a network of valleys are believed to have formed through water entering from the outside.
Top 25 des merveilles du Cosmos vues par la NASA, l’espace du point de vue d’Hubble
ESPACE - La Nasa a annoncé qu'un astéroïde allait frôler la Terre dimanche 7 septembre en début de soirée. Mais pas de panique, l'agence américaine se veut rassurante et explique sur son site internet...
‘Like Salt Sprinkled on Black Velvet’. The NASA/ESA Hubble Space Telescope has captured this view of the dwarf galaxy UGC 5497, which looks a bit like salt sprinkled on black velvet in this image. The object is a compact blue dwarf galaxy that is infused with newly formed clusters of stars. The bright, blue stars that arise in these clusters help to give the galaxy an overall bluish appearance that lasts for several million years until these fast-burning stars explode as supernovae.