सम्पूर्ण अन्तरिक्ष बिज्ञान र प्रबिधि को संयोजन को ब्लग साइट|
Alan Bean Descends Intrepid
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Alan L. Bean, Lunar Module pilot for the Apollo 12 mission, starts down the ladder of the Lunar Module (LM) "Intrepid" to join astronaut Charles Conrad, Jr., mission Commander, on the lunar surface.
NASA is planning an Oct. 27 launch of the first Earth-observing satellite to measure both global climate changes and key weather variables. The National Polar-orbiting Operational Environmental Satellite System Preparatory Project (NPP) is the first mission designed to collect critical data to improve weather forecasts in the short-term and increase our understanding of long-term climate change. NPP continues observations of Earth from space that NASA has pioneered for more than 40 years. NPP's five science instruments, including four new state-of-the-art sensors, will provide scientists with data to extend more than 30 key long-term datasets. These records, which range from the ozone layer and land cover to atmospheric temperatures and ice cover, are critical for global change science. "NPP's observations of a wide range of interconnected Earth properties and processes will give us the big picture of how our planet changes," said Jim
This interacting pair of galaxies is included in Arp's catalog of peculiar galaxies as number 148. Arp 148 is the staggering aftermath of an encounter between two galaxies, resulting in a ring-shaped galaxy and a long-tailed companion. The collision between the two parent galaxies produced a shockwave effect that first drew matter into the center and then caused it to propagate outwards in a ring. The elongated companion perpendicular to the ring suggests that Arp 148 is a unique snapshot of an ongoing collision. Infrared observations reveal a strong obscuration region that appears as a dark dust lane across the nucleus in optical light. Arp 148 is nicknamed Mayall's object and is located in the constellation of Ursa Major, the Great Bear, approximately 500 million light-years away. This image is part of a large collection of 59 images of merging galaxies taken by the Hubble Space Telescope and released on April 24, 2008, the observatory's 18th anniversary.
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