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Thursday, 19 November 2009 16:49 |
SkyWatch and HubbleWatch
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SkyWatch and HubbleWatch
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| It's a big sky -- someone has to watch it. This quick, weekly audio broadcast explores the astronomy news of the day, with topics ranging from dark matter to nearby planets. Join hosts Carol Christian of the Space Telescope Science Institute and Jim O'Leary of the Maryland Science Center for the latest buzz on space. SkyWatch also includes HubbleWatch, a monthly round-up of news from NASA's Hubble Space Telescope. |
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Show 288: Space Balls
Buckminsterfullerine or "Buckyballs" are carbon structures first discovered in a lab in 1985. Astronomers have long wondered if these molecules, comprised of hexagonal and pentagonal sections similar to a soccer ball, exist in space as well. Researchers using the Spitzer Space Telescope recently found the large molecules in the gas clouds of a planetary nebula. Their presence likely plays a role in many cosmic processes.
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Show 290: Perseid Shower
The annual Perseid Meteor Shower lit the sky in August, for those lucky enough to have a clear sky and energetic enough to stay up past midnight. The meteors that skim across the sky every year are tiny bits of dust burning up in the EarthÕs atmosphere. The Perseid debris was left behind by the comet 109P/Swift-Tuttle.
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Show 289: Crash Culprit Identified
An object that slammed into Jupiter in July 2009, causing Hubble to interrupt its post-servicing mission calibration to snap some pictures, was almost certainly an asteroid rather than comet. Astronomers suggest that such impacts might happen as often as every 10 to 15 years.
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Show 287: HubbleWatch for July 2010
Hubble identifies the culprits who targeted Jupiter. A black hole is on the loose, roaming its galaxy. And a planet losing its atmosphere may look like a giant comet.
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Show 286: Eclipse Shadows
Solar eclipses come in several varieties and provide spectacular views for observers on the Earth. As the Moon moves between the Earth and the Sun, the Moon's shadow is cast into space. Sometimes this shadow intersects the Earth. Eclipses can be total, when the Moon completely obscures the Sun; grazing, when the Moon only covers part of the Sun; and annular, when the Moon and Sun are aligned, but the Moon does not cover the Sun completely. Eclipse shadows are visible to satellites that observe the Earth. In some cases, the images are quite spectacular, and show the path of the eclipse across the planet.
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Show 285: Copernicus Receives Hero's Burial
Nicolaus Copernicus' findings were condemned by the Roman Catholic Church as heretical, but he was reburied as a hero back in May 2010, nearly 500 years after he was laid to rest in unmarked grave. His revolutionary theory that Earth revolved around the Sun helped usher in the modern scientific age.
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Show 284: Mission to Venus
Venus is a planet veiled in mystery, largely due to its thick atmosphere and hostile conditions for spacecraft. The Japanese space agency, JAXA, has recently launched two probes to Venus. One, Akatsuki, is designed to learn about the Venusian atmosphere and surface. The second probe, Ikaros, is an experimental solar sail. Results will be forthcoming over the next few months.
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Show 283: SOFIA's First Light
The SOFIA Airborne Observatory project, initiated in 1966, has captured its first images. The unusual observatory is a Boeing 747 aircraft with a 2.5 meter telescope. A hole, cut in the side of the fuselage, allows astronomers to point the telescope and view the universe in wavelengths that are blocked from the ground by the Earth's atmosphere.
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Show 282: HubbleWatch for June 2010
Planets orbiting a star at odd angles to one other challenge astronomers' notions of how planets should behave. Hubble tracks down a star running away from home and catches another star feeding on its own planet.
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Show 281: Jupiter Loses a Stripe
One of the cloud belts that ring the giant planet Jupiter has recently disappeared. The missing stripe is big enough to swallow 20 Earths, and its disappearance has transformed the appearance of the solar system's largest planet.
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Show 280: Into Orbit
Astronauts take lots of items into space with them. Some are personal items, others are patches and similar memorabilia likely to be presented to museums and dignitaries. Quite a few famous objects go into space -- examples include a Star Wars light saber and a piece of Isaac Newton's legendary apple tree.
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Show 279: Runaway Star
The 30 Doradus complex in a small nearby galaxy, the Large Magellanic Cloud, is home to a giant, massive star cluster rapidly forming hundreds of stars. It is probably the most massive star cluster in the local part of the universe. This region has been studied extensively, and data from Australia, Chile and the Hubble have been combined to analyze it. The scientists have found it contains at least one massive, runaway star, somehow kicked out of the rest of the cluster. How this occurs and whether there are more runaways are questions to be answered in the future.
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Show 278: Herschel's Warm, Wonderful Universe
The European Space Agency's Herschel Observatory has been observing the infrared universe for more than a year now, studying monster stars and probing dark dust clouds that now reveal regions of intense star formation.
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Show 277: Solar Satellite Observes Huge Eruption
NASA's new Solar Dynamics Observatory (SDO) has taken some astonishing movies of the Sun. One shows one of the biggest eruptions of the Sun in recent years, with billions of tons of solar material blasting into space. The images have helped solve a solar mystery.
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