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Common Jupiters?

A recent study using data collected between 2006 and 2007 found evidence for 10 free-floating planets roughly the mass of Jupiter, suggesting they are common. The discovery supports the 'ejection' scenario where planets are kicked out from their solar systems due to close gravitational encounters with other planets or stars.

Flipping hot Jupiters

Astronomers at Northwestern University have developed a computer simulation that explains how hot Jupiters form with flipped orbits around their stars. The study, published in Nature, suggests that gravitational perturbations from other planets in the system can cause the inner planet to lose energy and orbit closer to its star.

SourceNorthwestern University·JournalNature·DateMay 11, 2011

Sugar-grain sized meteorites rocked the climates of early Earth and Mars, according to new study

Scientists suggest that bombardments of micro-meteorites on Earth and Mars four billion years ago led to catastrophic cooling effects, making it hard for early life to thrive. The influx of sulphur dioxide into the atmospheres of both planets could have plunged them into an Arctic winter, lasting millions of years.

SourceImperial College London·JournalGeochimica et Cosmochimica Acta·DateApr 1, 2011

Scripps Research and MIT scientists discover class of potent anti-cancer compounds

Researchers from Scripps Research and MIT have discovered a class of extremely potent anti-cancer and anti-neurodegenerative disorder compounds. These compounds, including ABL127, were found using high-throughput screening and innovative testing techniques, and show promise for treating cancer and Alzheimer's disease.

SourceScripps Research Institute·JournalProceedings of the National Academy of Sciences·DateMar 7, 2011

Mission to extra-solar planets approved

The European Space Agency has approved a £400 million mission to study extra-solar planets, led by UCL, to look for signs of life in nearby star systems. The Exoplanet Characterisation Observatory (EChO) will use a 1.2 meter telescope to analyze the atmospheres of habitable planets and search for biomarkers.

AGU journal highlights -- Feb. 9, 2011

A new study suggests the Arctic Ocean ice may not reach a catastrophic tipping point due to climate change. Microearthquakes could help evaluate potential carbon sequestration sites by detecting fractures in rocks. This technique could pinpoint unknown fractures that could lead to long-term storage of carbon dioxide.

SourceAmerican Geophysical Union·JournalGeophysical Research Letters·DateFeb 9, 2011

Planet from another galaxy discovered

Astronomers have discovered a planet from another galaxy orbiting a star that has entered our Milky Way, providing the first confirmed detection of an extragalactic exoplanet. The planet, HIP 13044 b, was detected using high-resolution spectrograph FEROS attached to the MPG/ESO telescope at ESO's La Silla Observatory.

SourceESO·JournalScience·DateNov 18, 2010

Scripps Research scientists identify new mechanism regulating daily biological rhythms

Researchers have identified a novel mechanism regulating circadian rhythms that could provide a new target for treating jet lag, shift work, sleep disturbances, diabetes, obesity, and some types of cancer. The discovery offers hope for modulating the body's core clock using synthetic ligands targeting nuclear receptors.

SourceScripps Research Institute·JournalJournal of Biological Chemistry·DateNov 11, 2010

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.

Asteroid collision forensics

Researchers pinpointed the exact date of a February 2009 asteroid collision using computer simulations and OSIRIS camera system images. The debris trail's three-dimensional shape, visible from a unique Rosetta space probe viewpoint, helped reconstruct the collision in detail.

SourceMax-Planck-Gesellschaft·JournalNature·DateOct 14, 2010

Planet hunters no longer blinded by the light

Using new optics technology developed at the University of Arizona's Steward Observatory, astronomers have obtained images of a planet on a closer orbit around its parent star than any other extrasolar planet previously found. The discovery enables scientists to search for planets closer to the star than has been previously possible.

SourceUniversity of Arizona·JournalThe Astrophysical Journal Letters·DateOct 14, 2010

Europa's hidden ice chemistry

Researchers found that water and sulfur dioxide react as ice with surprising speed and high yield at temperatures hundreds of degrees below freezing. This unexpected reaction could revamp current thinking about Europa's chemistry and geology, potentially leading to new discoveries on the moon and other icy bodies.

SourceNASA/Goddard Space Flight Center·JournalGeophysical Research Letters·DateOct 4, 2010