According to data gathered by NASA’s Cassini mission, parts of Titan might not see rain for more than 1,000 years.
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Rare Rain on Titan; Once Every 1,000 Years - 0 views
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In all of its observations of Titan, Cassini only spotted two instances of darkened regions that might have indicated rainfall.
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Jupiter May Help Supercharge Orionid Meteor Shower | Halley's Comet | Space.com - 0 views
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Jupiter's powerful gravity can help supercharge a meteor shower caused by trailing chunks of the famed Halley's comet, a new study suggests
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Every October, skywatchers are treated to a dazzling show when the Orionid meteors — leftover bits of Halley's comet
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Previous research had suggested that intense Orionid outbursts occur after the meteoroids fall into resonances with Jupiter's orbit
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Resonances are gravitational sweet spots in which objects' orbits around the sun are related by a ratio of two whole numbers. (A 1:2 resonance, for example, means that one body completes one orbit in the time it takes another object to make two orbits.)
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new study finds that Halley's comet itself has likely been in resonances with Jupiter in the
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determind that from 1404 B.C. to 690 B.C., the comet was likely trapped in a 1:6 resonance with Jupiter
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Debris deposited during these two periods are directly linked to heightened activity in the Orionid meteor showers in some years, according to the study.
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the unusual Orionid outburst observed in 1993 was due to 2:13 resonant meteoroids sloughed by Halley around 240 B.C
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predicts that the next similarly heightened display of meteors from this 2:13 resonance will be in 2070 A.D.
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Hubble Treasures Contest: iPad And iPod Touch Up For Grabs | Video | Space.com - 0 views
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Over a million observations of the Universe have been made by the Hubble Space Telescope. Spacetelescope.org is asking the public to sift through the archives, adjust the colors of their favorite photos with an online tool, and submit to the contest
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Over a million observations of the Universe have been made by the Hubble Space Telescope. Spacetelescope.org is asking the public to sift through the archives, adjust the colors of their favorite photos with an online tool, and submit to the contest
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Join the 2012 Hubble's Hidden Treasures Competition | ESA/Hubble - 0 views
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hidden in Hubble’s huge data archives are still some truly breathtaking images that have never been seen in public
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Download the data from the Hubble Legacy Archive, process using powerful open-source software such as the ESO/ESA/NASA FITS Liberator and make a beautiful image for our Hubble’s Hidden Treasures Image Processing Contest Flickr group.
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The best datasets that you identify will also be featured as future pictures of the week and photo releases on spacetelescope.org.
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Hubble's Hidden Treasures 2012 | ESA/Hubble - 0 views
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Searching Hubble’s archive for hidden treasures is a lot of fun, and it’s pretty straightforward, even if you don’t have advanced knowledge
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Hubble’s Hidden Treasures 2012: Find and tweak Hubble observations using a set of simple online tools. It’s easy and fun, and anyone can take part. Top prize: Apple iPod Touch and goodies
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Hubble’s Hidden Treasures 2012 Image Processing: Find Hubble observations and then process them using professional astronomical imaging software. An extra challenge for amateur astronomers or people keen to learn about astronomical image processing. Top prize: Apple iPad and goodies
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What is image processing? | ESA/Hubble - 0 views
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Hubble takes pictures which capture many more colours and gradations of light and dark than the human eye (or consumer digital cameras) can see
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designed to make scientifically useful observations rather than being optimised for pretty pictures.
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beautiful Hubble images that we all know have all been extensively tweaked and optimised by hand, in order to reveal as much of the data as possible
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brightening the glowing gas in nebulae or compressing the dynamic range of galaxy images so that the core and spiral arms can both be seen equally clearly
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Image processing is the name for this process of selecting data, adjusting colour, contrast and dynamic range to reveal the hidden detail in Hubble’s scientific data.
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How to find hidden treasures in the archive | ESA/Hubble - 0 views
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recommend narrowing your search to give only results from ACS, WFC3 and WFPC2 – Hubble’s general purpose cameras.
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scientists get the first chance to work with their data. These are marked “proprietary data, no preview”.
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Another useful view is the footprints tab, which shows the location of Hubble’s images overlaid on an image of the part of the sky where they are located
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opens the interactive tool which you can use to look at the image in more detail, and carry out basic image processing such as adjusting the zoom and changing the contrast and colour balance
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Many billions of rocky planets in the habitable zones around red dwarfs in the Milky Way - 0 views
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new result from ESO’s HARPS planet finder shows that rocky planets not much bigger than Earth are very common in the habitable zones around faint red stars. The international team estimates that there are tens of billions of such planets in the Milky Way galaxy alone, and probably about one hundred in the Sun’s immediate neighbourhood. This is the first direct measurement of the frequency of super-Earths around red dwarfs, which account for 80% of the stars in the Milky Way.
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Billions Habitable Planets in Milky Way | Search for Life on Alien Planets | Space.com - 0 views
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A planetary system from the early Universe - 0 views
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A group of European astronomers has discovered an ancient planetary system that is likely to be a survivor from one of the earliest cosmic eras, 13 billion years ago. The system consists of the star HIP 11952 and two planets, which have orbital periods of 290 and 7 days, respectively. Whereas planets usually form within clouds that include heavier chemical elements, the star HIP 11952 contains very little other than hydrogen and helium. The system promises to shed light on planet formation in the early universe – under conditions quite different from those of later planetary systems, such as our own
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Statistically, a star that contains more “metals” - in astronomical parlance, the term includes all chemical elements other than hydrogen and helium – is more likely to have planets.
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What is unusual is the fact that they orbit such an extremely metal-poor and, in particular, such a very old star!
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In 2010 we found the first example of such a metal-poor system, HIP 13044. Back then, we thought it might be a unique case; now, it seems as if there might be more planets around metal-poor stars than expected
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Jupiter helps Halley's Comet give us more spectacular meteor displays - 0 views
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The dramatic appearance of Halley's comet in the night sky has been observed and recorded by astronomers since 240 BC. Now a study shows that the orbital influences of Jupiter on the comet and the debris it leaves in its wake are responsible for periodic outbursts of activity in the Orionid meteor showers. The results will be presented by Aswin Sekhar at the National Astronomy Meeting in Manchester on Tuesday 27th March.
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Growing bones with Lego - 0 views
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A video produced for Google Science Fair shows how researchers at Cambridge making synthetic bone have turned to legendary children’s toy Lego for a helping hand.
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The video, which has already had over 100,000 views, goes behind the scenes at the lab to show how the team develop the bone samples.
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synthetic bone has a range of revolutionary applications; from the obvious, such as medical implants, to the almost science fiction, such as a material in building construction
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To make the bone-like substance you take a sample, then you dip it into one beaker of calcium and protein, then rinse it in some water and dip in into another beaker of phosphate and protein – you have to do it over and over and over again to build up the compound
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team started to think about ways of automating the arduous process – the ideal being a robot of some kind that they could set up and run in the background
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contains microprocessors, motors, and sensors that can be programmed to perform basic tasks on repeat
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Research is a funny thing because you might think that we order everything up from scientific catalogues – but actually a lot of the things we use around the lab are household items, things that we picked up at the local home goods store – so our Lego robots just fit in with that mind-set
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The team at Cambridge are working on hydroxyapatite–gelatin composites to create synthetic bone, and the work is generating considerable interest due to the low energy costs and improved similarity to the tissues they are intended to replace.
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video was made in the lab at the Department of Engineering by Google to help promote their online Science Fair
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Billions of Habitable Worlds Likely in the Milky Way - 0 views
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results from a new study that searched for rocky planets in the habitable zones around red dwarf stars
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new observations with HARPS mean that about 40% of all red dwarf stars have a super-Earth orbiting in the habitable zone where liquid water can exist on the surface of the planet
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another recent finding which suggested that every star in our night sky has at least one planet circling it — which didn’t include red dwarf stars – and our galaxy could be teeming with worlds
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HARPS team surveyed a carefully chosen sample of 102 red dwarf stars in the southern skies over a six-year period
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total of nine super-Earths (planets with masses between one and ten times that of Earth) were found, including two inside the habitable zones of Gliese 581 and Gliese 667 C respectively
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combining all the data, including observations of stars that did not have planets, and looking at the fraction of existing planets that could be discovered, the team has been able to work out how common different sorts of planets are around red dwarfs
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find that the frequency of occurrence of super-Earths in the habitable zone is 41% with a range from 28% to 95%.
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Less than 12% of red dwarfs are expected to have giant planets (with masses between 100 and 1000 times that of the Earth).
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habitable zone around a red dwarf, where the temperature is suitable for liquid water to exist on the surface, is much closer to the star than the Earth is to the Sun
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But red dwarfs are known to be subject to stellar eruptions or flares, which may bathe the planet in X-rays or ultraviolet radiation, and which may make life there less likely.”
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Gliese 667 Cc. This is the second planet in this triple star system and seems to be situated close to the center of the habitable zone
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this planet is more than four times heavier than the Earth it is the closest twin to Earth found so far and almost certainly has the right conditions for the existence of liquid water on its surface
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Psychedelics in the Sky: NASA Launches 5 Rockets in 5 Minutes - 0 views
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After several days of delays due to weather and technical issues, NASA has now successfully launched five suborbital sounding rockets in five minutes from the Wallops Flight Facility in Virginia as part of a study of the upper level jet stream.
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first rocket was launched at 4:58 a.m. EDT and each subsequent rocket was launched 80 seconds apart.
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rockets released a chemical tracer that created psychedelic-looking clouds at the edge of space, which were reported to be seen from as far south as Wilmington, N.C.; west to Charlestown, W. Va.; and north to Buffalo, N.Y.
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The Anomalous Transport Rocket Experiment (ATREX) is a Heliophysics sounding rocket mission that gathered information to better understand the process responsible for the high-altitude jet stream located 95-105 km (60 to 65 miles) above the surface of the Earth.
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map of the mid-Atlantic region of the U.S. shows the projected area where the rockets may be visible while the motors are burning through flight
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winds found in this upper jet stream typically have speeds of 320 to well over 480 km/hr (200 to over 300 mph)
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two of the rockets had instrumented payloads to measure the pressure and temperature in the atmosphere at the height of the high-speed winds
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NASA will release more information on the outcome of the experiment after scientists have had time to review the data
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This jet stream is located in the same region where strong electrical currents occur in the ionosphere.
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a region with a lot of electrical turbulence, of the type that can adversely affect satellite and radio communications.
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Not only did the rockets release the chemical tracers to allow scientists and the public to “see” the winds in space
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James Cameron returns from the deep : Nature News & Comment - 0 views
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Apollo 11′s Rocket Engines Found on the Bottom of the Ocean - 0 views
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Amazon.com founder Jeff Bezos has located the Apollo 11 F-1 rocket engines and plans to recover them
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using state-of-the-art deep sea sonar, the team has found the Apollo 11 engines lying 14,000 feet below the surface
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producing one and a half million pounds of thrust, burning 6,000 pounds of rocket grade kerosene and liquid oxygen every second
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On July 16, 1969, Apollo 11 was launched and the five F-1s burned for just a few minutes, and then plunged back to Earth into the Atlantic Ocean.
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hopes that the space agency would allow the recovered engines to be displayed at the Smithsonian or another museum
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no public funding will be used to attempt to raise and recover the engines, as it’s being undertaken by him privately
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Jeff Bezos Plans to Recover Apollo 11 Rocket Engines From Ocean Floor | Wired Science |... - 0 views
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Billionaire Jeff Bezos announced plans to recover from the bottom of the Atlantic Ocean at least one of the F-1 engines that carried the Apollo 11 rocket into space
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If one engine is raised, he imagines the agency would make it available to the public at the Smithsonian museum in Washington, D.C
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Should he recover more than one, he has asked NASA to consider making the second one available at the Museum of Flight in Seattle
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