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Rabies Research Designed for Prevention

By Guest PostSeptember 17, 2013Health, Sciencecdc, heidi brown, hot-spot, human populations, michael acoba, mount lemmon, pima county, pima county officials, prevention, public education, rabies case, rabies research, robert clark, surrounding mountains, university of arizona, viral disease, wildlife

UA undergraduate researcher Robert Clark, his public health mentor and Pima County officials collaborated on an investigation of rabies cases in Pima County.

In a volunteer opportunity turned research project, University of Arizona undergraduate researcher Robert Clark has developed a comprehensive, multi-year snapshot of animal cases of rabies in Pima County.

Clark began working with a mentor in the UA Mel and Enid Zuckerman College of Public Health and county officials to learn about the seasonality of rabies in animals and identify exactly where rabid animals were most often found. (more…)

How Galaxies Grow Up

By Guest PostOctober 20, 2012Scienceadam block, age, andromeda galaxy, astronomer, benjamin weiner, blue galaxies, california, computer program, computer simulation, deep2, emission line, galaxies, Galaxy, galaxy evolution, galaxy population, galaxy type, gas, grow up, hawaii, internal motion, keck telescopes, lick observatory, light years, m88 galaxy, massive system, Milky Way, mount lemmon, NASA, observational data, random motion, redshift survey, rotation speed, santa cruz, skycenter, spiral disk shape, star forming galaxies, susan kassin, ua, universe, university, velocity

A study of 544 star-forming galaxies shows that disk galaxies like our own Milky Way reached their current state as orderly rotating pinwheels much later than previously thought, long after much of the universe’s star formation had ceased.

Galaxies are in no hurry to grow up, a team of astronomers has discovered. A comprehensive study of hundreds of galaxies observed by the Keck telescopes in Hawaii and NASA’s Hubble Space Telescope has revealed an unexpected pattern of change that extends back 8 billion years, or more than half the age of the universe.

Researchers say the distant blue galaxies they studied are gradually transforming into rotating disk galaxies like our own Milky Way. Until now, it had not been clear how a galaxy’s organization and internal motion change over time, said Benjamin Weiner, assistant astronomer at the UA Steward Observatory and co-author of the paper describing the findings, which are published in The Astrophysical Journal. (more…)

Asteroid 2011 AG5 – A Reality Check

By Guest PostMarch 2, 2012Sciencearizona, asteroid 2011 ag5, cassegrain reflector telescope, catalina mountains, don yeomans, earth interception, gravitational influence, mars, mount lemmon, near earth object, orbit, space rock, spaceguard, torino impact hazard scale, tucson

Asteroid 2011 AG5 has been receiving a lot of attention lately because of a very unlikely scenario which would place it on an Earth-interception course 28 years from now. Here is a scientific reality check of this relatively nondescript space rock which is currently ranked a “1” on the 1 to 10 Torino Impact Hazard Scale

As of Feb. 26, 2012, asteroid 2011 AG5 is one of 8,744 near-Earth objects that have been discovered. It is approximately 460 feet (140 meters) in size and its orbit carries it as far out as beyond Mars’ orbit and as close to the sun as halfway between Earth and Venus. It was discovered on Jan. 8, 2011, by astronomers using a 60-inch Cassegrain reflector telescope located at the summit of Mount Lemmon in the Catalina Mountains north of Tucson, Arizona. (more…)

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Rabies Research Designed for Prevention

How Galaxies Grow Up

Asteroid 2011 AG5 – A Reality Check