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VLBA measurement promises complete picture of the Milky Way

12 October 2017 Astronomy Now

Astronomers using the National Science Foundation’s Very Long Baseline Array have directly measured the distance to a star-forming region on the opposite side of our Milky Way Galaxy from the Sun. Their achievement nearly doubles the previous record for distance measurement within our galaxy.

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Eta Carinae star system revealed in unprecedented detail

19 October 2016 Astronomy Now

An international team of astronomers have used the Very Large Telescope Interferometer to image the Eta Carinae star system in the greatest detail ever achieved. They found new and unexpected structures within the binary system, including in the area between the two stars where extremely high velocity stellar winds are colliding.

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Protoplanetary disc’s spiral arms embrace young star

1 October 2016 Astronomy Now

Swirling around the young star Elias 2-27 is a stunning spiral-shape pinwheel of dust. This striking feature, seen with the Atacama Large Millimetre/submillimetre Array (ALMA), is the product of density waves — gravitational perturbations in the star’s protoplanetary disc that produce sweeping arms reminiscent of a spiral galaxy, but on a much smaller scale.

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Repeat fast radio bursts detected from same sky location

3 March 2016 Astronomy Now

Astronomers for the first time have detected repeating short bursts of radio waves from an enigmatic source that is likely located well beyond the edge of our Milky Way galaxy. The findings indicate that these “fast radio bursts” come from an extremely powerful object which occasionally produces multiple bursts in under a minute.

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ATLASGAL survey of southern Milky Way completed

24 February 2016 Astronomy Now

A spectacular new image of the Milky Way has been released to mark the completion of the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL). The APEX telescope in Chile has mapped the full area of the galactic plane visible from the Southern Hemisphere for the first time at submillimetre wavelengths — between infrared light and radio waves.

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Atacama Pathfinder Experiment (APEX) starts its second decade

11 February 2016 Astronomy Now

The Atacama Pathfinder Experiment (APEX) is a 12-metre radio telescope for observations at submillimetre wavelengths, operating 5,100 metres above sea level in the Atacama Desert. On 25-26 January, the project’s 10th anniversary was celebrated at the APEX base station in Sequitor, San Pedro de Atacama. A number of special guests were present at the occasion.

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Space-Earth system produces highest-resolution astronomical image

27 January 2016 Astronomy Now

Using an orbiting radio-astronomy satellite combined with 15 ground-based radio telescopes, astronomers have made the most-detailed astronomical image yet, revealing new insights about a gorging black hole in a galaxy 900 million light-years away. The image has the resolving power of a telescope about 62,500 miles wide, or almost eight times the diameter of the Earth.

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VLA reveals spectacular “haloes” of spiral galaxies

13 October 2015 Astronomy Now

An international team of astronomers used the Karl G. Jansky Very Large Array (VLA) to investigate 35 edge-on spiral galaxies at distances from 11 million to 137 million light-years from Earth. The study has revealed that “haloes” of cosmic rays and magnetic fields above and below the galaxies’ discs are much more common than previously thought.