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International Astronomical Union formally approves 227 star names

24 November 2016 Astronomy Now

The creation of a specialised IAU Working Group, the Working Group on Star Names (WGSN), was approved by the IAU Executive Committee in May 2016 to formalise star names that have been used colloquially for centuries. WGSN has now established a new catalogue of IAU star names, with the first set of 227 approved names published on the IAU website.

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Hunt for Planet 9 reveals extremely distant solar system objects

30 August 2016 Astronomy Now

In the race to discover a proposed ninth planet in our solar system, astronomers are conducting the largest, deepest survey for objects beyond Neptune and the Kuiper Belt. Nearly 10 percent of the sky has been explored to date using some of the largest and most advanced telescopes, revealing several never-before-seen objects at extreme distances from the Sun.

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Hubble discovers moon orbiting the dwarf planet Makemake

26 April 2016 Astronomy Now

NASA’s Hubble Space Telescope has spotted a small, dark moon orbiting Makemake, the second brightest icy dwarf planet — after Pluto — in the Kuiper Belt. The moon, provisionally designated S/2015 (136472) 1 and nicknamed MK 2, is estimated to be 100 miles in diameter. Makemake and its moon are more than 50 times farther away than Earth is from the Sun.

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Final results of NameExoWorlds public vote released

17 December 2015 Astronomy Now

The votes are in — the names of 19 ExoWorlds (14 stars and 31 exoplanets orbiting them) have been chosen by public vote in the NameExoWorlds contest, and accepted by the IAU. Reflecting the truly international interest in astronomy, over half a million votes from 182 countries and territories contributed to the new official designations of the alien worlds.

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Simpler planet test classifies 99 percent of all known exoplanets

11 November 2015 Astronomy Now

Nine years ago, the International Astronomical Union (IAU) defined what it takes to be a planet, but left the classification of exoplanets for future consideration. With exoplanet discoveries now numbering close to 5,000, UCLA professor of planetary astronomy Jean-Luc Margot describes a simple “planet test” that can be readily applied to bodies orbiting the Sun and other stars.

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Galaxy survey charts the fading and slow death of the universe

11 August 2015 Astronomy Now

An international team of astronomers studying more than 200,000 galaxies has made the most comprehensive assessment of the energy output of the nearby universe. The Galaxy And Mass Assembly (GAMA) project confirms that the energy produced is only about half what it was two billion years ago and this fading is occurring across all wavelengths from the ultraviolet to the far infrared. The universe is slowly dying.

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Kepler finds tenth transiting ‘Tatooine’ exoplanet

11 August 2015 Astronomy Now

Astronomers have discovered the tenth known ‘transiting circumbinary’ planet, which orbits two stars. Like the fictional planet “Tatooine” from Star Wars, this planet has two suns in its sky. Known as Kepler-453 b, the new planet is a gas-giant six times the diameter of Earth and lies in the habitable zone of its host pair of stars.