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Through hardship to the stars

Delegates explored ways to overcome propulsion limitations, including suspended animation and negative mass concepts. Theoretical models offer tantalizing options, but significant hurdles remain before interstellar travel becomes a reality.

SourceIOP Publishing·JournalPhysics World·DateJan 4, 2012

The Lutetia asteroid – a prehistoric relic

Researchers found that the Lutetia asteroid is a dense, intact relic dating back to the solar system's formation. The asteroid's density was calculated using a mathematical method developed by Professor Mikko Kaasalainen, revealing a large and metallic core surrounded by a more porous outer layer.

SourceAcademy of Finland·JournalScience·DateOct 28, 2011

How to learn a star's true age

Researchers have found a method to measure a star's true age using its spin. Astronomer Soren Meibom presented his findings in a press conference, nearly doubling the age covered by previous studies of younger clusters. The technique involves measuring stellar rotation rates for stars in clusters with known ages.

SourceCenter for Astrophysics | Harvard & Smithsonian·JournalThe Astrophysical Journal Letters·DateMay 24, 2011

NRL researchers view the sun in 3-D

The STEREO spacecraft provide a 360-degree view of the Sun, allowing NRL researchers to map its entire atmosphere continuously. This capability enables them to study the solar corona and inner heliosphere in unprecedented detail, shedding light on the evolution and structure of the solar atmosphere.

Primordial dry ice fuels comet jets

Scientists from the University of Maryland's EPOXI mission have discovered that dry ice is the 'jet' fuel for comets, including Hartley 2. The discovery reveals that solar heating of subsurface frozen carbon dioxide is powering the comet's jets, which are rich in CO2 gas and particles of dust and ice.

A new way to weigh planets

A new way to weigh planets has been developed using radio signals from small spinning stars called pulsars, providing an independent check on previous results. The measurements of planet masses made this new way could feed into data needed for future space missions.