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Tracing star formation rates in distant galaxies

27 March 2016 Astronomy Now

To understand the physics of the evolution and formation of galaxies it is crucial to know at what rate galaxies form stars, referred to as the star-formation rate. A group of researchers used Earth- and space-based telescopes to create a complete multi-wavelength picture of distant galaxies.

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Exiled exoplanet kicked out of star’s local neighbourhood?

1 December 2015 Astronomy Now

A planet discovered last year sitting at an unusually large distance from its star — 16 times farther than Pluto is from the Sun — may have been kicked out of its birthplace close to the star in a process similar to what may have happened early in our own solar system’s history. The planet’s 13-million-year-old parent star is known as HD 106906 and lies 300 light-years away.

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Unveiling the turbulent times of a dying star

1 December 2015 Astronomy Now

Astrophysicists have used the National Science Foundation’s Blue Waters supercomputer to perform 3-D simulations of a mere 10 milliseconds in the collapse of a massive star into a neutron star, proving that these catastrophic events — often called hypernovae — can generate the enormous magnetic fields needed to explode the star and fire off bursts of gamma rays visible halfway across the universe.