Thursday, November 7, 2013

Asteroid w/ 6 Comet-like Tails Seen for 1st Time

Astronomers viewing our solar system's asteroid belt with NASA's Hubble Space Telescope have seen for the first time an asteroid with six comet-like tails of dust. Designated P/2013 P5, the asteroid resembles a rotating lawn sprinkler.

"We were literally dumbfounded when we saw it," said lead investigator David Jewitt of the University of California at Los Angeles. "Even more amazing, its tail structures change dramatically in just 13 days as it belches out dust. That also caught us by surprise. It's hard to believe we’re looking at an asteroid."

splash
This NASA Hubble Space Telescope set of images reveals a never-before-seen set of six comet-like tails radiating from a body in the asteroid belt, designated P/2013 P5.
 
Jewitt leads a team whose research paper appears online in the Nov. 7 issue of the Astrophysical Journal Letters.

P/2013 P5 has been ejecting dust periodically for at least five months. Astronomers believe it is possible the asteroid's rotation rate increased to the point where its surface started flying apart. They do not believe the tails are the result of an impact with another asteroid because they have not seen a large quantity of dust blasted into space all at once.

More - Link >>> http://science.nasa.gov/science-news/science-at-nasa/2013/07nov_6tails/

Source: NASA Science News.

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gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
About the SpaceWatchtower Editor/Author: < http://buhlplanetarium.tripod.com/#GAW >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
  < http://www.planetarium.cc >
* Adler Planetarium, Chicago:
  < http://adlerplanetarium.tripod.com >
* Astronomer, Educator, Optician John A. Brashear:
  < http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
  < http://www.andrewcarnegie.cc >
* Civil War Museum of Andrew Carnegie Free Library:
  < http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
  < http://inclinedplane.tripod.com >
* Public Transit:
  < http://andrewcarnegie2.tripod.com/transit >

Tuesday, November 5, 2013

Saving Library Materials: "Great Depression Mentality" ???

http://andrewcarnegie.tripod.com/Allegheny-Clocktower.JPG

Rising above the trees of Allegheny Square is the clocktower of America's first
publicly-funded Carnegie Library, the original Allegheny Regional Branch of
The Carnegie Library of Pittsburgh (originally the Carnegie Free Library of Allegheny)
which opened in the then-independent City of Allegheny (now Pittsburgh's North Side)
in 1890. After lightning struck the clocktower in 2006, and even though the City
repaired all damages, The Carnegie Library of Pittsburgh abandoned the original
building and built a new, smaller branch library three blocks north on Federal Street.
The Children's Museum of Pittsburgh is now considering reuse of the library building.
(Image Source: Friends of the Zeiss; Photographer: Lynne S. Walsh)
More on the history of the Carnegie Free Library of Allegheny:
Link >>> http://andrewcarnegie2.tripod.com/photoalbumAlleghenyReg.htm

By Glenn A. Walsh
Reporting for SpaceWatchtower

The reuse of library space for programming, rather than to store library materials, was one of the themes mentioned by Allegheny County Library Association (ACLA) Executive Director Marilyn Jenkins, during her annual budget presentation before the Board of Directors of the Allegheny Regional Asset District (ARAD) on August 20. She noted, approvingly, that some libraries were now reusing library space, which once contained book stacks, for programming for teenagers. In her statement, she disparaged older librarians, who she said had a "Great Depression mentality," for their reluctance to discard library materials and reuse the space for programming.

Glenn A. Walsh, former Life Trustee of the Andrew Carnegie Free Library and Music Hall in Carnegie, Pennsylvania, found this statement appalling. Hence, Mr. Walsh delivered the following statement before the Board of Directors of the Allegheny Regional Asset District, at the District's annual public hearing on October 29:




Statement before the     Glenn A. Walsh
Annual Hearing of           P.O. Box 1041
   the Board of                   Pittsburgh, Pennsylvania 15230-1041 U.S.A.
 Directors of the               Telephone: 412-561-7876
 Allegheny Regional        Electronic Mail: < gaw@andrewcarnegie.cc >
   Asset District                 Internet Site: < http://www.andrewcarnegie.cc >
 2013 October 29                 Blog: < http://spacewatchtower.blogspot.com >

Good afternoon. I am Glenn A. Walsh, 633 Royce Avenue, Mt. Lebanon. From 1995 to 2000, I was a Life Trustee on the Board of Trustees of the Andrew Carnegie Free Library and Music Hall in Carnegie, Pennsylvania, and I author a web site on the History of Andrew Carnegie and Carnegie Libraries at < www.andrewcarnegie.cc >. Today, I am speaking as a private citizen representing no organization.

I was quite troubled, during your annual budget hearings, when the Executive Director of the Allegheny County Library Association spoke disparagingly about some librarians who she said had a “Great Depression mentality” regarding their reluctance to discard library materials.  I wonder if she has forgotten the primary purpose of a library is to hold and maintain published materials of interest to a wide variety of audiences.

When I was a Library Trustee, I sought and received the donation of several additional book stacks, so our small library did not have to weed as many materials out of the collection. At the same time, a reference librarian told me that many older books, magazines, and journals had been discarded from Carnegie Library’s Allegheny Regional Branch. Are all of these discarded materials now available on-line or on microfilm in Allegheny County? I doubt it.

As a former Library Trustee, I am fully aware of the space and financial limitations of public libraries. However, the published information they have acquired and preserved over years and decades should not be discarded simply due to lack of space or funding. 

I ask that the Allegheny Regional Asset District work with public libraries, and perhaps even academic libraries, to plan a special repository for published materials that community libraries can no longer host. Such a repository should include at least one copy of every published material, in whatever media is most efficient, if such a material can no longer be retained at any community library in Allegheny County.

I would be happy to assist with any such plan.

gaw


As an addendum, I would like to recognize and again thank the public libraries which donated book stacks and other materials to the Andrew Carnegie Free Library and Music Hall in the late 1990s:

* Mount Lebanon Public Library - Donated surplus book stacks, when their library closed for an expansion project.

* Baldwin Township Public Library - Donated book stacks and books when, regrettably, their library had to close permanently.

* Robinson Township Public Library - When the first attempt to establish a public library in Robinson Township failed, the book stacks and other materials were donated to the Andrew Carnegie Free Library and Music Hall, which is patronized by Robinson Township residents. Some years later, the second attempt to establish a public library in Robinson Township was successful.

* Upper Saint Clair Public Library - Donated several brand-new computer carrels, for which their library had no use.

Source: Glenn A. Walsh Reporting for SpaceWatchtower, a project of Friends of the Zeiss.

Related Blog Posts ---

Carnegie Library Bldg. May Be Reused by Children's Museum  (2013 Sept. 3):

Link >>> http://spacewatchtower.blogspot.com/2013/09/carnegie-library-bldg-may-be-reused-by.html


Buhl Community Park at Allegheny Square Opens  (2012 June 25):

Link >>> http://spacewatchtower.blogspot.com/2012/06/buhl-community-park-at-allegheny-square.html 


Want to receive SpaceWatchtower blog posts in your inbox ?
Send request to < spacewatchtower@planetarium.cc >..

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
About the SpaceWatchtower Editor/Author: < http://buhlplanetarium.tripod.com/#GAW >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
  < http://www.planetarium.cc >
* Adler Planetarium, Chicago:
  < http://adlerplanetarium.tripod.com >
* Astronomer, Educator, Optician John A. Brashear:
  < http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
  < http://www.andrewcarnegie.cc >
* Civil War Museum of Andrew Carnegie Free Library:
  < http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
  < http://inclinedplane.tripod.com >
* Public Transit:
  < http://andrewcarnegie2.tripod.com/transit >

Saturday, November 2, 2013

Partial Sunrise Solar Eclipse Sunday Morning

SUNDAY GOOD MORNING TO THE SUN AND MOON—TOGETHER AGAIN

File:SolarEclipse2013Nov03H.GIF
(Image Sources: NASA, Wikipedia.org )

By Francis G. Graham
Professor Emeritus of Physics
Kent State University

Reporting for SpaceWatchtower
                         

Eclipse of the Sun / Solar Eclipse:
Tips For Safe Viewing

 

(Following Professor Graham's article is an addendum for East Coast North American viewers)


There will be an eclipse of the Sun on Sunday morning, and part of it will be visible from Pittsburgh.

General Eclipse Situation

This will be an Annular-Total , or Hybrid, eclipse, total in most places but annular near the ends. An annular eclipse is an eclipse where the Moon, due to its increased distance, does not cover the Sun completely. For most of the eclipse, the 4000-mile radius of the Earth is sufficient to project people on the eclipse path into totality.

The eclipse will begin in the western Atlantic Ocean 10:04:25 UT, which is 5:04 AM, Eastern Standard Time. The Sun will of course not have arisen yet in Pittsburgh. The shadow will proceed across the Atlantic to a maximum point just off the coast of Liberia, Africa; then it will continue on and make landfall in Gabon. It will cross the Republic of the Congo and then the northern Democratic Republic of the Congo. The shadow will continue to Uganda and Kenya, and leave the Earth in Ethiopia, around 15:28:13 UT (10:28 AM Eastern Standard Time).

The eclipse will not be visible at all, west from a line connecting Cleveland with Portsmouth, Ohio and down to Atlanta, Georgia and Tallahasseee. The farther east you are to watch the Sunrise, the better.

The Pittsburgh Eclipse Experience

From Pittsburgh, Pennsylvania a limited eclipse is visible but not much. It will be almost over as soon as the Sun rises on the southeastern horizon!

The eclipse will start in Pittsburgh before the Sun is above the horizon, at 5:16:45 Eastern Standard Time. The Sun will be clear above a good flat east-southeast horizon about 6:56 AM, depending on how far east or west you are in the greater Pittsburgh area. Just fifteen minutes later, at 7:09:29 AM Eastern Standard Time, the eclipse will end!! The Sun at that time will then be only two degrees above the horizon as seen from Pittsburgh!

If you want to see this eclipse from Pittsburgh, be sure to find a place where you have a very flat horizon to the east-southeast under clear skies. Also be sure to set your clock back one hour; November 3 at 2 AM is the time switch to Eastern Standard Time from Eastern Daylight Time.

Please let me know if you observed this eclipse or tried to, and how it went. (Information can be sent to the following address, which will be forwarded to Professor Graham: fotz@planetarium.cc )

Source: Francis G. Graham, Professor Emeritus of Physics, Kent State University
Reporting for SpaceWatchtower, a project of Friends of the Zeiss.
Professor Graham was also a Planetarium Lecturer and Observatory Observer at Pittsburgh's original Buhl Planetarium and Institute of Popular Science in the  late 1970s and the 1980s, and he serves on the Steering Committee of Friends of the Zeiss.

Eclipse of the Sun / Solar Eclipse:
Tips For Safe Viewing

 

Addendum: For East Coast North American Viewers

By Glenn A. Walsh, Reporting for SpaceWatchtower

 

While people viewing the November 3 solar eclipse in Pittsburgh or eastern Ohio will see a very slight partial eclipse, people near the eastern coast of North America will be treated to a larger partial eclipse of the Sun, weather and clouds permitting. Here are some percentages of obscuration of the Sun, by the Moon, at maximum eclipse for select cities:

* New York: 48 percent
* Boston: 54 percent
* Philadelphia: 44 percent
* Washington: 35 percent
* Miami: 36 percent
* Montreal: 32 percent
* Toronto: 10 percent

In all cases, the eclipse is in progress at local sunrise, and the eclipse ends just about 15 to 20 minutes later. Maximum eclipse occurs around 7:00 a.m. Eastern Standard Time, or perhaps a few minutes earlier (do not forget to reset your clocks, as Daylight Saving Time ends at 2:00 a.m. Eastern Daylight Time, which becomes 1:00 a.m. Eastern Standard Time).

You will need an unobstructed view of the Sun, shortly after sunrise, to see this eclipse. Of course, clouds and inclement weather can also obstruct the view of an eclipse.

 

Remember--NEVER, NEVER, NEVER look directly at the Sun or a solar eclipse with a telescope, binoculars, or any other optical device--it would cause PERMANENT BLINDNESS INSTANTLY. Looking directly at the Sun or a solar eclipse with the naked-eye could also cause eye damage.

 

There are no nerve cells in the eyes, so eye damage could occur while the viewer feels no pain !!!

 

Click the following link for tips on how to view a solar eclipse or eclipse of the Sun safely:

 

Eclipse of the Sun / Solar Eclipse:
Tips For Safe Viewing


Other helpful links for information on the November 3 eclipse ---

NASA Eclipse Web Site: Link >>> http://eclipse.gsfc.nasa.gov/SEgoogle/SEgoogle2001/SE2013Nov03Hgoogle.html

EarthSky.org: Link >>> http://earthsky.org/astronomy-essentials/get-ready-hybrid-solar-eclipse-on-november-3

Space.com: Link >>> http://www.space.com/23419-hybrid-solar-eclipse-visibility-images-november-3-2013.html

Source: Glenn A. Walsh, Reporting for SpaceWatchtower, a project of Friends of the Zeiss.

Want to receive SpaceWatchtower blog posts in your inbox ?
Send request to < spacewatchtower@planetarium.cc >..

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
About the SpaceWatchtower Editor/Author: < http://buhlplanetarium.tripod.com/#GAW >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
  < http://www.planetarium.cc >
* Adler Planetarium, Chicago:
  < http://adlerplanetarium.tripod.com >
* Astronomer, Educator, Optician John A. Brashear:
  < http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
  < http://www.andrewcarnegie.cc >
* Civil War Museum of Andrew Carnegie Free Library:
  < http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
  < http://inclinedplane.tripod.com >
* Public Transit:
  < http://andrewcarnegie2.tripod.com/transit >

Thursday, October 31, 2013

Astronomical Calendar: 2013 November

http://buhlplanetarium2.tripod.com/BuhlMiniRRline1966-1967.JPG
This photograph shows a very busy day at the Miniature Railroad and Village exhibit at Pittsburgh's original Buhl Planetarium and Institute of Popular Science, during the 1966-1967 exhibition season. One of Buhl's most popular exhibits, it was displayed each year from 1954 to 1991. Known as a very popular Pittsburgh attraction during the Thanksgiving and Christmas holidays, the four months of the year known to the Buhl staff as "Railroad Season" actually began each year on the first Friday of November. Today, the Miniature Railroad and Village is displayed at Pittsburgh's Carnegie Science Center and will open to the public on the day after Thanksgiving. More on the history of the Miniature Railroad and Village: Link >>> http://buhlplanetarium3.tripod.com/MiniRR.htm

Astronomical Calendar for 2013 November:

Link >>> http://buhlplanetarium4.tripod.com/astrocalendar/2013.html#nov


The current month's Astronomical Calendar can also be found on the cover page of the History of The Buhl Planetarium and Institute of Popular Science, Pittsburgh web site at this link:

Link >>> http://buhlplanetarium.tripod.com/#astrocal


Source: Friends of the Zeiss.

Want to receive SpaceWatchtower blog posts in your inbox ?
Send request to < spacewatchtower@planetarium.cc >..

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
About the SpaceWatchtower Editor/Author: < http://buhlplanetarium.tripod.com/#GAW >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
  < http://www.planetarium.cc >
* Adler Planetarium, Chicago:
  < http://adlerplanetarium.tripod.com >
* Astronomer, Educator, Optician John A. Brashear:
  < http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
  < http://www.andrewcarnegie.cc >
* Civil War Museum of Andrew Carnegie Free Library:
  < http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
  < http://inclinedplane.tripod.com >
* Public Transit:
  < http://andrewcarnegie2.tripod.com/transit >

Tuesday, October 29, 2013

'War of the Worlds' Panic Broadcast: 75th Anniversary

File:Landingsite statue.JPG

Photograph of monument at the supposed landing site of a 1938 Martian invasion in Grovers Mill, New Jersey. (Image Source: Wikipedia.org )

By Glenn A. Walsh
Reporting for SpaceWatchtower

Wednesday evening will mark the 75th anniversary of the legendary Orson Welles' radio broadcast, "The War of the Worlds," which created the illusion in the minds of some radio listeners that Earth was actually being invaded by beings from the Planet Mars! Broadcast on the day before Halloween (1938 October 30) as an episode of the radio drama anthology series, "The Mercury Theatre on the Air" on the CBS Radio Network (including then-Pittsburgh CBS Radio Network affiliate WJAS-AM 1300), the broadcast was an adaptation of the H.G. Wells science fiction novel by the same name, which had been published in 1898.

More than half of the first part of the 60-minute broadcast consisted of realistic-sounding, yet fictional radio news bulletins and on-the-scene remote broadcasts from fictional news reporters. Although the beginning of the broadcast made it clear that the program was simply a dramatization, many people had begun listening to the program well after the program had begun. Hence, some of these people were in a panic, seriously thinking that the radio news bulletins were real, and that spaceships and beings from the Planet Mars had actually invaded the tiny hamlet of Grover's Mill, New Jersey, on their way to New York City.

Although people in New Jersey and New York were particularly alarmed, the nationwide broadcast caused fear from coast-to-coast. The Associated Press news wire service reported:

* Pittsburgh: A man returned home during the broadcast to find his wife about to commit suicide by poison. She reportedly screamed, referring to the supposed events in New Jersey: "I'd rather die this way than like that."

* San Francisco: Hundreds of telephone calls to police and newspapers came from men wanting to volunteer to help stop the invasion from Mars.

* Providence: The telephone switchboard of the Providence Journal was swamped with calls from hysterical and weeping women asking about the massacre. Some urged the electric company to turn off all city lights so the city would be safe from the enemy.

* Kansas City: One motorist, who had filled his automobile with gasoline and readied his entire family to leave, called asking "Where is it safe?"

The fake news reports used by the radio drama were similar to on-the-spot radio news reports that had been recently heard by the public, such as the famous radio report of Herbert Morrison (who, in 1958, became the first News Director of WTAE-TV 4 in Pittsburgh), then a reporter for Chicago radio station WLS-AM on the destruction of the Hindenburg Airship, in Lakehurst, New Jersey on 1937 May 6. The War of the Worlds 1938 dramatization mimiced another CBS Radio program, a news documentary series called The March of Time, which combined real news events with reenactments. Combined with real news of the era, that seemed to show that world events could be leading to another war in Europe, the American public at that time was on-edge.

In the days following the 1938 broadcast, public outrage regarding the hoax led to an investigation by the Federal Communications Commission (FCC); however, the FCC did not sanction the CBS network in any way. Several people tried suing CBS for "mental anguish" and "personal injury"; all lawsuits were dismissed, except for one case where the network did reimburse a Massachusetts man for shoe money he had used to escape from the Martians.

German dictator Adolf Hitler described the panic brought on by the program as "evidence of the decadence and corrupt condition of democracy."

At the age of 23, the notoriety from this broadcast made the name of the young dramatist, Orson Welles, a household-word. Three years later, Orson Welles would produce and star in the landmark movie, Citizen Kane.

Over the years, many radio stations have replayed the original 1938 broadcast, usually around Halloween. During the Summer months in the 1970s, the program was replayed twice each Summer on a rather unique educational radio station, operated by campers at a Summer camp near White Sulphur Springs, West Virginia (the author, Glenn A. Walsh, was a camp counselor and General Manager of this radio station).

Additionally, several other radio stations, and one American television network, broadcast remakes of the original broadcast, updating it to modern broadcast standards so it did sound like a real news broadcast. Some of these broadcasts were so realistic, such as one in South America, that it created a riot when the people realized it was a hoax! Several years ago, there was also a television movie that portrayed the 1938 broadcast.

This year, in commemoration of the radio program's 75th anniversary, Pittsburgh public news radio station WESA-FM 90.5 plans to air a remake of the broadcast, having the Martian invasion set in Downtown Pittsburgh in 1938. This remake will air on WESA-FM on Wednesday evening at 9:00 p.m. EDT (Note: Since Daylight Saving Time was not observed in 1938, this will be exactly 75 years since the first broadcast on the CBS Radio Network at 8:00 p.m. EST on 1938 October 30). The previous hour (starting at 8:00 p.m. EDT), WESA-FM's public affairs program, Essential Pittsburgh (heard weekdays at 12:00 Noon and repeated at 8:00 p.m., and available on-demand on the < wesa.fm > web site), will air highlights of the original 1938 radio broadcast (this highlight program will be heard on October 30 at both 12:00 Noon and 8:00 p.m.).

More on "The War of the Worlds" radio broadcast:
Link >>> http://johnbrashear.tripod.com/wlcr.html#warofworlds

Related Blog Post ---

'War of the World's' Panic Broadcast Remembered by NJ Woman (2014 Oct. 30):

Link >>> http://spacewatchtower.blogspot.com/2014/10/war-of-worlds-panic-broadcast.html 


Source: Glenn A. Walsh Reporting for SpaceWatchtower, a project of Friends of the Zeiss.

Want to receive SpaceWatchtower blog posts in your inbox ?
Send request to < spacewatchtower@planetarium.cc >..

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
About the SpaceWatchtower Editor/Author: < http://buhlplanetarium.tripod.com/#GAW >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
  < http://www.planetarium.cc >
* Adler Planetarium, Chicago:
  < http://adlerplanetarium.tripod.com >
* Astronomer, Educator, Optician John A. Brashear:
  < http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
  < http://www.andrewcarnegie.cc >
* Civil War Museum of Andrew Carnegie Free Library:
  < http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
  < http://inclinedplane.tripod.com >
* Public Transit:
  < http://andrewcarnegie2.tripod.com/transit >

Saturday, October 26, 2013

Eye Changes After 2 Weeks in Space

Animal Enclosure Modules similar to the one shown here, being inspected by Mission Specialist Tracy Caldwell, Ph.D., and Pilot Charles Hobaugh aboard Space Shuttle Endeavor (STS-118), are used to study animals in low gravity conditions. Scientists are reporting mice traveling aboard STS-133 showed evidence of ocular nerve damage and changes in eye gene expression. Image: NASA

Animal Enclosure Modules, used to study animals
in low gravity conditions, being inspected by
Mission Specialist Tracy Caldwell, Ph.D. and Pilot
Charles Hobaugh aboard Space Shuttle Endeavor
 (STS-118). (Image Source: NASA) 

Just 13 days in space may be enough to cause profound changes in eye structure and gene expression, report researchers from Houston Methodist, NASA Johnson Space Center and two other institutions in the October 2013 issue of Gravitational and Space Research.

The study, which looked at how low gravity and radiation and oxidative damage impacts mice, is the first to examine eye-related gene expression and cell behavior after spaceflight.

"We found many changes in the expression of genes that help cells cope with oxidative stress in the retina, possibly caused by radiation exposure," says Houston Methodist pathologist Patricia Chévez-Barrios, the study's principal investigator. "These changes were partially reversible upon return to Earth. We also saw optic nerve changes consistent with mechanical injury, but these changes did not resolve. And we saw changes in the expression of DNA damage repair genes and in apoptotic pathways, which help the body destroy cells that are irreparably damaged."

Since 2001, studies have shown astronauts are at increased risk of developing eye problems, like premature age-related macular degeneration. Experts suspect the cause is low gravity, heightened exposure to solar radiation, or a combination of the two.

More - Link >>> http://www.laboratoryequipment.com/news/2013/10/two-weeks-space-cause-eye-changes?et_cid=3559651&et_rid=544607214&type=cta

Sources: Houston Methodist Medical System, LaboratoryEquipment.com .

Want to receive SpaceWatchtower blog posts in your inbox ?
Send request to < spacewatchtower@planetarium.cc >..

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
About the SpaceWatchtower Editor/Author: < http://buhlplanetarium.tripod.com/#GAW >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
  < http://www.planetarium.cc >
* Adler Planetarium, Chicago:
  < http://adlerplanetarium.tripod.com >
* Astronomer, Educator, Optician John A. Brashear:
  < http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
  < http://www.andrewcarnegie.cc >
* Civil War Museum of Andrew Carnegie Free Library:
  < http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
  < http://inclinedplane.tripod.com >
* Public Transit:
  < http://andrewcarnegie2.tripod.com/transit >

Thursday, October 24, 2013

Lunar Laser Com-System Sets Data Transmission Record

LLCD mission concept artist rendition.

NASA's Lunar Laser Communication Demonstration (LLCD) has made history using a pulsed laser beam to transmit data over the 239,000 miles between the moon and Earth at a record-breaking download rate of 622 megabits per second (Mbps).

LLCD is NASA's first system for two-way communication using a laser instead of radio waves. It also has demonstrated an error-free data upload rate of 20 Mbps transmitted from the primary ground station in New Mexico to the spacecraft currently orbiting the moon.

"LLCD is the first step on our roadmap toward building the next generation of space communication capability," said Badri Younes, NASA's deputy associate administrator for space communications and navigation (SCaN) in Washington. "We are encouraged by the results of the demonstration to this point, and we are confident we are on the right path to introduce this new capability into operational service soon."

Since NASA first ventured into space, it has relied on radio frequency (RF) communication. However, RF is reaching its limit as demand for more data capacity continues to increase. The development and deployment of laser communications will enable NASA to extend communication capabilities such as increased image resolution and 3-D video transmission from deep space.

More - Link >>> http://www.nasa.gov/press/2013/october/nasa-laser-communication-system-sets-record-with-data-transmissions-to-and-from/#.UmcXdEqyKHt

Source: NASA.

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