UA Science

The artist concept depicts multiple-transiting planet systems, which are stars with more than one planet. The planets eclipse or transit their host star from the vantage point of the observer. This angle is called edge-on. Image Credit: NASA

Got Planets? Smaller Stars Are The Best Bet

A group of scientists, Daniel Apai of Steward Observatory and Gijs Mulders and Ilaria Pascucci of UA Planetary Sciences, have continued the quest for Earth-size planets. They have shown that lower-mass stars make for more promising hunting grounds than do their sun-like counterparts. Stars weighing in at less than half of the sun's mass are twice as likely to possess Earth to Neptune-sized planets and these planets can be found closer to their host stars, the research team reports in the Astrophysical Journal. The study suggests that scientists looking for planets outside of our solar system are more likely to discover Earth-size planets by focusing their search on lower-mass stars. The UA press release can be found HERE. The preprint of the now-published article can be found HERE.

Image: Zhaoyu Li/Shanghai Observatory

Most Luminous Quasar in Early Universe

An international team, led by astronomers at Peking University, China and Steward Observatory, including Regents' Professor Xiaohui Fan, visiting graduate students Feige Wang and Jinyi Yang, assistant astronomer Ian McGreer and LBTO support astronomer David Thompson, have discovered the most luminous quasar yet known in the early Universe. This quasar, at a redshift of 6.3, or a distance of 12.8 billion lightyears, is powered by a...

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