ScienceDaily: Astronomy News

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• Gas-giant exoplanets cling close to their parent stars
• NASA's Voyager 1 explores final frontier of our 'solar bubble'
• Spiral galaxies like Milky Way bigger than thought
• Sterilizing Mars spacecraft is largely a waste of money, two experts argue
• Violent birth of neutron stars: Computer simulations confirm sloshing and spiral motions as stellar matter falls inward

Gas-giant exoplanets cling close to their parent stars Posted: 27 Jun 2013 01:14 PM PDT Gemini Observatory's Planet-Finding Campaign finds that, around many types of stars, distant gas-giant planets are rare and prefer to cling close to their parent stars. The impact on theories of planetary formation could be significant.

NASA's Voyager 1 explores final frontier of our 'solar bubble' Posted: 27 Jun 2013 11:08 AM PDT Data from Voyager 1, now more than 11 billion miles (18 billion kilometers) from the sun, suggest the spacecraft is closer to becoming the first human-made object to reach interstellar space.

Spiral galaxies like Milky Way bigger than thought Posted: 27 Jun 2013 07:26 AM PDT Let's all fist bump: Spiral galaxies like our own Milky Way appear to be much larger and more massive than previously believed, according to a new study.

Sterilizing Mars spacecraft is largely a waste of money, two experts argue Posted: 27 Jun 2013 07:26 AM PDT Two university researchers say environmental restrictions have become unnecessarily restrictive and expensive -- on Mars.

Violent birth of neutron stars: Computer simulations confirm sloshing and spiral motions as stellar matter falls inward Posted: 27 Jun 2013 05:30 AM PDT Scientists have conducted the most expensive and most elaborate computer simulations so far to study the formation of neutron stars at the center of collapsing stars with unprecedented accuracy. These worldwide first three-dimensional models with a detailed treatment of all important physical effects confirm that extremely violent, hugely asymmetric sloshing and spiral motions occur when the stellar matter falls towards the center. The results of the simulations thus lend support to basic perceptions of the dynamical processes that are involved when a star explodes as supernova.

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