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1,382 articles from Astronomy.com

• THURSDAY 16. SEPTEMBER, 2010
• 00:00 NASA's lunar spacecraft completes exploration mission phase

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  The Lunar Reconnaissance Orbiter (LRO) is turning its attention to scientific research and will continue to map the Moon for 2 to 4 more years.  

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• WEDNESDAY 15. SEPTEMBER, 2010
• 00:00 Chandra finds evidence for stellar cannibalism

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  Research suggests a star once thought to be in its youth is actually an old red giant that recently consumed a nearby sun or giant planet.  

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• TUESDAY 14. SEPTEMBER, 2010
• 00:00 Hubble data harvests distant solar system objects

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  Scientists have discovered 14 new trans-Neptunian objects by culling the data archives of the space telescope.  

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• 00:00 The king of planets dominates the sky

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  An unusually close Jupiter will make September's opposition especially memorable.  

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• MONDAY 13. SEPTEMBER, 2010
• 00:00 Astronomer unveils the mysteries of "Green Pea" galaxies

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  These extremely compact star cities discovered by citizen scientists appear to have low amounts of complex elements after being diluted by streams of gas and strong supernova winds.  

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• 00:00 Mercury at its morning best

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  The innermost planet reaches greatest western elongation September 19.  

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• FRIDAY 10. SEPTEMBER, 2010
• 00:00 Deadly tides mean early exit for hot Jupiters

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  An analysis of tidal interactions between planets and their host stars provides a potential explanation why scientists failed to detect exoplanets in star clusters like 47 Tucanae.  

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• 00:00 NASA data shed new light on water and volcanoes on Mars

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  The ratio of oxygen and carbon dioxide isotopes found on the Red Planet suggests that liquid water primarily existed at temperatures near freezing and that hydrothermal systems similar to Yellowstone's hot springs have been rare throughout the planet's past.  

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• 00:00 Supernova shrapnel found in meteorite

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  The findings suggest that a supernova sprayed a mass of finely grained particles into the cloud of gas and dust that gave birth to the solar system 4.5 billion years ago.  

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• THURSDAY 9. SEPTEMBER, 2010
• 00:00 Amateur astronomers are first to detect objects impacting Jupiter

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  Scientists are using these findings to refine the Jupiter collision rate, which appears to be more frequent than previously thought.  

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• 00:00 Deep Impact spacecraft eyes comet target

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  The mission will use all three of the spacecraft's instruments to scrutinize Comet Hartley 2 for more than 2 months.  

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• 00:00 NGC 300: A nearby galactic exemplar

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  The galaxy's surprisingly normal structure makes it an ideal specimen for astronomers studying the structure and content of spiral galaxies such as our own Milky Way.  

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• WEDNESDAY 8. SEPTEMBER, 2010
• 00:00 Astronomers say it's possible to spot volcanoes on alien worlds

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  An eruption sends out fumes and various gases, so volcanic activity on a rocky exoplanet might leave a telltale atmospheric signature.  

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• 00:00 Galactic tendrils shed light on evolution of spiral galaxies

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  For the first time, a new survey has detected the telltale structures of spiral galaxies swallowing smaller dwarf companions in star cities more distant than our immediate galactic neighborhood, opening up the possibility of testing our current views of galaxy evolution in a new way.  

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• 00:00 Two asteroids pass by Earth Wednesday

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  An asteroid designated 2010 RF12 is expected to pass within approximately 49,000 miles of Earth at 5:12 p.m. EDT. Another asteroid, 2010 RX30, passed within approximately 154,000 miles overnight. Neither is a threat to Earth.  

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• TUESDAY 7. SEPTEMBER, 2010
• 00:00 Fundamental constant might change across space

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  Research results currently under peer review imply that the fine-structure constant, which characterizes the strength of the electromagnetic force, might have different values depending on which direction scientists are looking in the sky.  

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• 00:00 Missing piece inspires new look at Mars puzzle

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  New experiments suggest that chlorine compounds from NASA's Viking landers then thought to be contaminants from cleaning fluids might indeed have contained carbon-based chemicals, the building blocks of life.  

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• FRIDAY 3. SEPTEMBER, 2010
• 00:00 NASA selects investigations for first mission to encounter the Sun

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  The Solar Probe Plus will plunge directly into the Sun's atmosphere to learn why it's so much hotter than our star's visible surface and what propels the solar wind.  

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• 00:00 New Hubble observations of Supernova 1987A reveal composition of "star guts" pouring out

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  The new observations of the "String of Pearls" surrounding the remnant not only tell scientists what elements are being recycled into the Large Magellanic Cloud, but also how the dwarf galaxy changes its environment on human timescales.  

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• 00:00 Spitzer finds a flavorful mix of asteroids

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  Near-Earth objects seem to be more varied in color and composition than previously thought.  

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• THURSDAY 2. SEPTEMBER, 2010
• 00:00 Recipe for water: just add starlight

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  Observations with the Herschel infrared space observatory have revealed that ultraviolet light is a key ingredient in the formation of an unexpected cloud of water vapor around an old red giant star.  

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• WEDNESDAY 1. SEPTEMBER, 2010
• 00:00 ESO brings starburst galaxy into focus

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  NGC 4666's vigorous star formation is probably the result of gravitational interactions with neighboring galaxies.  

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• 00:00 NASA and ATK successfully test five-segment solid rocket motor

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  Despite the cancellation of the Constellation program, there is still a strong chance that the booster could play a part in future launch vehicles.  

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• TUESDAY 31. AUGUST, 2010
• 00:00 NASA Glenn tests alternative green rocket engine

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  The non-toxic oxygen and methane propellant combination has the potential for greater engine performance.  

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• 00:00 Spectrum of young extrasolar planet yields surprising results

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  The data indicate that young gas-giant planets are extremely cloudy.  

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