In Brief: En route to comet Hartley 2

EPOXI at comet Hartley 2.

Understanding how comets work--what drives their activity--is crucial to the use of comets in studying the early solar system. EPOXI (Extrasolar Planet Observation and Deep Impact Extended Investigation) flew past comet 103P/Hartley 2, one with an unusually small but very active nucleus, taking both images and spectra. Unlike large, relatively inactive nuclei, this nucleus is outgassing primari...

EPOXI: Comet 103P/Hartley 2 observations from a worldwide campaign

Rotation State of Comet 103 P / Hartley 2 from Radio

The nuclei of active comets emit molecules anisotropically from discrete vents. As the nucleus rotates, we expect to observe periodic variability in the molecular emission line profiles, which can be studied through mm/submm spectroscopy. Using this technique Based on observations carried out with the IRAM 30-m, JCMT 15-m, and CSO 10.4-m telescopes. IRAM is supported by INSU/CNRS (France), MPG ...

En route to personalized prophylaxis.

Predicting a patient’s outcome reliably is perhaps the one of the most challenging aspects of the art of medicine. In this issue of Blood, Ay and colleagues introduce science to this art by validating the Khorana risk score (the first risk assessment model that predicts how likely a cancer patient is to develop symptomatic VTE) and confirming the value of 2 biomarkers, D-dimer and soluble P-sel...

The detection, localization, and dynamics of large icy particles surrounding Comet 103P/Hartley 2

The Deep Impact Spacecraft flew past Comet 103P/Hartley 2 on November 4th, 2010. Images revealed the comet to be enveloped in a field of debris composed of fine grained dust, ice, and hundreds of discrete millimeter to decimeter sized particles. In this work, a selection of the brightest particles are identified and photogrammetrically located in 3D space to examine their positions and dynamics...