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tag:blogger.com,1999:blog-6762481015010870446.post-773252788225047924: Entranced by a Transit
Astro Watch

Direct link Entranced by a Transit

31 Aug 2015, 20:34 UTC <div class="separator" style="clear: both; text-align: center;"><a href="http://2.bp.blogspot.com/-DQLsESgInFk/VeS514k00eI/AAAAAAAAwwI/488P4G9LCbY/s1600/PIA18330_modest.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="Credit: NASA/JPL-Caltech/Space Science Institute" border="0" height="324" src="http://2.bp.blogspot.com/-DQLsESgInFk/VeS514k00eI/AAAAAAAAwwI/488P4G9LCbY/s640/PIA18330_modest.jpg" title="Credit: NASA/JPL-Caltech/Space Science Institute" width="640" /></a></div><br /><span style="font-family: Helvetica Neue, Arial, Helvetica, sans-serif;"><div style="text-align: justify;">Saturn's moon Dione crosses the face of the giant planet in this view, a phenomenon astronomers call a transit. Transits play an important role in astronomy and can be used to study the orbits of planets and their atmospheres, both in our solar system and in others. By carefully timing and observing transits in the Saturn system, like that of Dione (698 miles or 1,123 kilometers across), scientists can more precisely determine the orbital parameters of Saturn’s moons.<a name="more"></a></div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">This view looks toward the unilluminated side of the rings from about 0.3 degrees below the ring plane. The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on May 21, 2015.</div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">The view was acquired at a distance of approximately 1.4 million miles (2.3 million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 119 degrees. Image scale is 9 miles (14 kilometers) per pixel.</div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">The Cassini mission is a ...
http://astronomynow.com/?p=9327: Gravitationally-lensed distant galaxies imaged with the Large Millimetre Telescope
Astronomy Now

Direct link Gravitationally-lensed distant galaxies imaged with the Large Millimetre Telescope

31 Aug 2015, 15:33 UTC The Large Millimetre Telescope, located atop Sierra Negra (4,600 metres above sea level) in the state of Puebla, Mexico, is a bi-national collaboration between UMass Amherst and the Instituto Nacional de Astrofísica, Óptica y Electrónica. Image credit: UMass / James Lowenthal.In the 1980’s, observations of nearby galaxies made with the Infrared Astronomical Satellite, along with observations of the far-infrared/submillimetre background with the Cosmic Background Explorer satellite, showed that the universe emits about as much energy density at infrared and submillimetre wavelengths as it does at optical and ultraviolet wavebands. Where does it all come from? A breakthrough came with the discovery of a large population of sources very bright at submillimetre wavelengths at large cosmic distances. These so-called submillimetre selected galaxies (SMGs) have luminosities hundreds of times larger than that of the Milky Way, powered in part by star formation. Identifying and understanding the nature of these sources has, however, proven to be challenging because they are so distant and hence smaller in angular size than most single telescopes can resolve. The Large Millimetre Telescope (LMT) is the world’s largest single-dish, steerable, millimetre-wavelength telescope designed specifically for astronomical observations. Situated on the summit of Volcán Sierra Negra at an altitude ...
http://feeds.feedburner.com/29DAC908-64B9-496B-B886-DFFB8DF5760D: LEGO to launch: Astronaut from Denmark taking Danish toys to space station
collectSPACE.com: Space History News

Direct link LEGO to launch: Astronaut from Denmark taking Danish toys to space station

31 Aug 2015, 15:20 UTC
http://rss.sciam.com/sciam/D611045B-535A-4559-92F9434D69F4F10D: Sun Accused of Stealing Planetary Objects from Another Star
Scientific American

Direct link Sun Accused of Stealing Planetary Objects from Another Star

31 Aug 2015, 14:00 UTC

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