News – Page 214 – Astronomy Now

Earth’s ‘plasmaspheric hiss’ protects against a harmful radiation belt

27 November 2014 Astronomy Now

Researchers at MIT, the University of Colorado and elsewhere have found that very low-frequency electromagnetic waves in the Earth’s upper atmosphere form a shield, protecting the planet’s surface from the Van Allen belt’s high-energy radiation.

‘Eye of Sauron’ provides new way of measuring distances to galaxies

26 November 2014 Astronomy Now

A team led by Dr. Sebastian Hoenig from the University of Southampton has developed a new way of measuring precise distances to galaxies tens of millions of light-years away, refining the distance to NGC 4151 and providing a way for accurately determining black hole masses.

Dawn spacecraft’s geological maps of asteroid Vesta

25 November 2014 Astronomy Now

Launched in 2007, Nasa’s Dawn spacecraft orbited and surveyed large asteroid Vesta between July 2011 and September 2012. This detailed map is the culmination of a two-and-a-half-year geological mapping campaign.

UK team announces plan to crowd-source moon mission

20 November 2014 Stephen Clark

Scientists hope private backers will kick-start a mission to land a robotic probe on the South Pole of the moon within the next 10 years, drill deep into lunar bedrock and analyze primordial core samples to study the origins of the solar system.

Gravity saved the universe after the Big Bang?

19 November 2014 Astronomy Now

Recent theories suggest that the production of Higgs particles in the inflationary phase of the early universe should have led to instability and collapse. Now a European team offers an explanation why this didn’t happen, answering fundamental questions about how we are all here.

Illustris Collaboration depiction of large-scale structure in the universe.

Quasar axes align with large-scale cosmic structures

19 November 2014 Astronomy Now

A European research team has used data from ESO’s Very large Telescope in Chile to discover that the rotational axes of quasars align with large-scale structures in the universe.

MAVEN begins science mission at Mars

18 November 2014 Stephen Clark

NASA’s newest Mars orbiter has formally started a one-year research campaign to study an ancient case of climate change that starved the red planet of water, breathable air and potential life, scientists said Monday.

Rosetta’s OSIRIS camera captures Philae’s bounce across comet

17 November 2014 Astronomy Now

A stunning sequence of images from Rosetta’s narrow-angle OSIRIS camera shows the dramatic journey of the Philae lander as it approaches and bounces on Comet 67P/Churyumov–Gerasimenko on 12th November 2014.

Rosetta imagery shows Philae at first landing site

16 November 2014 Astronomy Now

Images recorded by Rosetta’s navigation camera appear to show the lander, its shadow and the dust cloud kicked up by its first touchdown.

NASA map shows 20-year global distribution of asteroid impacts

15 November 2014 Astronomy Now

A new map released by NASA shows the distribution and intensity of more than 500 separate day and nighttime bolide (fireball) events recorded by U.S. government sensors in the period 1994-2013.