Sunday, December 23, 2012

New Meteorite: Asteroids More Complex Than Thought

New Meteorite Suggests That Asteroid Surfaces More Complex Than Previously Thought

Dec. 20, 2012 — Meteorites that had fallen from an asteroid impact that lit up the skies over California and Nevada in April are showing scientists just how complex an asteroid surface can be. A new study published in Science this week by an international team of researchers describes the speedy recovery of the meteorites and reports that this space rock is an unusual example from a rare group known as carbonaceous chondrites, which contain some of the oldest material in the solar system. The study of these meteorites and others like them could hold answers to unsolved mysteries about the origin of life on Earth as they contain molecules such as water and amino acids.


These are some of the 77 fragments of the Sutter’s Mill meteorite fall that were collected in April 2012. (Credit: NASA/E. James)
"We found that this meteorite is a 'breccia,' a mixture of different rocks that accumulated at the surface of a larger asteroid, and those surfaces can be more diverse than we thought before," said co-author Denton Ebel, chair of the Division of Physical Sciences at the American Museum of Natural History.

More - Link >>> http://www.sciencedaily.com/releases/2012/12/121220144153.htm?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+sciencedaily%2Fspace_time+%28ScienceDaily%3A+Space+%26+Time+News%29&utm_content=Yahoo!+Mail

Sources:  American Museum of Natural History, ScienceDaily.com .

Related Blog Post --

Calif. Meteorites May Change Life-on-Earth Theory (2012 Dec. 29):

Link >>> http://spacewatchtower.blogspot.com/2012/12/calif-meteorites-may-change-life-on.html


gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < gawalsh@planetarium.cc >
About the Author: < http://buhlplanetarium.tripod.com/#GAW >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < http://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Blog: < http://spacewatchtower.blogspot.com/ >
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, December 22, 2012

'How to' Science Fair Project Video Series from NASA

JPL/NASA News


Feature                                                                           December 20, 2012

Science Fair Projects Demystified in JPL Education Videos

Learn how to do a science fair project video series

Just in time for science fair season, the Education Office at NASA's Jet Propulsion Laboratory has released a video series designed to take teachers, students and parents through the sometimes mystifying process of crafting a science fair project.

The six-part video series features JPL scientist Serina Diniega, engineer Arby Argueta and educator Ota Lutz, who team up to take viewers step by step through the project design process, from generating an idea to communicating the final results in an attractive display.

Students learn about one of the hardest steps in the process - generating an idea - from the perspectives of scientific investigation and engineering design, discovering how to observe and ask questions about the world around them that can serve as starting points for their projects.

The videos also cover common areas that students often overlook while designing their projects, such as asking a testable question that examines just one concept, and considering elements that could affect an experiment and factoring them into the results.

Visit http://www.jpl.nasa.gov/education/sciencefair/ to watch the series, download related resources and to find notes for teachers and parents.

Kim Orr 818-354-0902
Jet Propulsion Laboratory, Pasadena, Calif.
kimberly.m.orr@jpl.nasa.gov

More - Link >>> http://www.jpl.nasa.gov/education/sciencefair/

Source: Jet Propulsion Laboratory/NASA.

Pittsburgh Regional School Science and Engineering Fair, the third oldest Science Fair in the United States of America (oldest Science Fair in a major metropolitan area; the two older fairs are state-wide fairs), started at Pittsburgh's original Buhl Planetarium and Institute of Popular Science in the Spring of 1940:
Link >>>  http://buhlplanetarium2.tripod.com/Buhlexhibits.htm#sciencefair

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < gawalsh@planetarium.cc >
About the Author: < http://buhlplanetarium.tripod.com/#GAW >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < http://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Blog: < http://spacewatchtower.blogspot.com/ >
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 >

Transit of Venus Viewed From Saturn

Dec. 20, 2012: Last June, astronomers urged sky watchers to observe the transit of Venus.  It was a once in a lifetime opportunity, they said. The black disk of the second planet wouldn't crawl across the face of the sun again for more than 100 years.

Saturn Transit of Venus (Earth transit, 200px)
A transit of Venus seen from Earth on June 6, 2012. Photo credit: Bum-Suk Yeom of Daejeon, South Korea

In fact, it's happening again this week--not on Earth, but Saturn.

"On Friday, Dec. 21st, there will be a transit of Venus visible from Saturn, and we will be watching it using  the Cassini spacecraft," says Phil Nicholson, a Cassini science team member from Cornell University. "This will be the first time a transit of Venus has been observed from deep space."

Because Saturn is 10 times farther from the sun than Earth, this transit of Venus won't be so easy to see.   The silhouette of the second planet will be just a tiny black speck on the shrunken disk of a sun 10 times farther from Saturn than Earth.  Cassini won't be beaming back any "beauty shots."  Nevertheless, the spacecraft will be conducting potentially ground-breaking science.

More - Link >>> http://science.nasa.gov/science-news/science-at-nasa/2012/20dec_transitofvenus/

Source: NASA Science News.

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < gawalsh@planetarium.cc >
About the Author: < http://buhlplanetarium.tripod.com/#GAW >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < http://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Blog: < http://spacewatchtower.blogspot.com/ >
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, December 20, 2012

Friday Morning Winter Begins - Apocalypse ?

Photo_of_skaters_on_Lake_Elizabeth.
This photograph, from the beginning of the twentieth century, shows public ice skating
on Lake Elizabeth in Allegheny Commons West Park, on Pittsburgh's North Side. Lake
Elizabeth is located just a few blocks west of Pittsburgh's original Buhl Planetarium and
Institute of Popular Science.
(Source: Pennsylvania Department, The Carnegie Library of Pittsburgh;
Photographer: Frank E. Bingaman)


The season of Winter officially begins in the Northern Hemisphere of Earth, at the time of the Winter Solstice, on Friday Morning, 2012 December 21 at 6:12 a.m. Eastern Standard Time (11:12 Coordinated Universal Time). In ancient times, Mid-Winter festivals centered around the Winter Solstice, which calendars at that time often placed on December 25. Instead of fighting these pagan festivals, the early Christian church simply adopted December 25 as the symbolic birth date of Jesus Christ (the actual birth date probably occurred in August or September).

For several years, the Winter Solstice of 2012 has been promoted as the end of the "Long Count" cycle of the calendar of the Maya Civilization, which flourished in the Yucatan Peninsula and Central America from about A.D. 250 to 900. Many have considered the end of this Mayan Calendar cycle as the time of the Apocalypse or the "end of the world."

The Winter Solstice of 2012 does mark a time point when, due to the Precession of the Equinoxes, our Sun will occult (come directly between) the center of our Milky Way Galaxy as viewed from Earth. While the Earth rotates on its axis once a day, through what is known as Precession, the axis itself also goes through a rotation (similar to a spinning top which wobbles) which is completed once every 26,000 years.

Precession of the Equinoxes was discovered by the ancient Greek Astronomer Hipparchus. It is not known if Maya astronomers had, also. independently discovered Precession. If so, this may be one explanation for the completion of their Long Count Calendar at this time.

Either way, the Sun occulting the center of the Milky Way Galaxy has no greater significance than the many other astronomical occultations, which take place each year.

The Mayan Calendar has many cycles. Mayan astronomers calculated the beginning of the Maya as having occured on September 6 in the year 3114 B.C. (as represented in the Julian Calendar). This date started the first "baktun" cycle of the Maya Calendar. 2012 December 21 marks the end of the 12th Maya baktun and the beginning of the 13th Maya baktun.

Mayan ethnologists have determined that the beginning of a baktun was considered by the Maya as a time of rebirth, not a time of catastrophe. It is significant to note that the Maya Calendar had designated the count of 20 baktuns to be known as a piktun, 20 piktuns to be known as a kalabtun, 20 kalabtuns to be known as a kinchiltun, and 20 kinchiltuns to be known as an alatun (one alatun is 63,081,429 years, the largest single designation of time in any society).

It should be quite clear that the Maya foresaw no apocalypse or "end of the world" for 2012 December 21. In fact, the adherents of their faith consider the beginning of the 13th baktun to be a time of spiritual awakening and rebirth.

This includes Miguel Sague, an ethnic Mayan and a member of the Cancy Indian Spiritual Circle, who sang his personal power song while arranging a sacred circle of rocks and burning copal with sage to purify the air, during another sacred event in Mayan theology, the Pittsburgh public viewing of the Transit of the Planet Venus crossing the image of the Sun on 2004 June 8, on the observation deck of The Duquesne Incline. The City of Pittsburgh's only public observation session, with telescopes, of the 2004 Transit of Venus was sponsored by Friends of the Zeiss, a non-profit organization which promotes the history and preservation of Pittsburgh's original Buhl Planetarium and Institute of Popular Science.

Source: Friends of the Zeiss.

Special Thanks: Meridian Passage Blog of Francis G. Graham, Professor Emeritus of Physics, Kent State University.

Links of Interest --

More on the Winter Solstice:
Link >>> http://scienceworld.wolfram.com/astronomy/WinterSolstice.html 

More on the Season of Winter:
Link >>> http://en.wikipedia.org/wiki/Winter 

NASA Science News: "Why the World Didn't End Yesterday" (issued 2012 December 14, but written for the day after the Winter Solstice):
Link >>> http://science.nasa.gov/science-news/science-at-nasa/2012/14dec_yesterday/

Classic "The Star of Bethlehem" Sky Drama, performed at Pittsburgh's original Buhl Planetarium and Institute of Science each Christmas season 1939 through 1990. This historic sky show talks about the historic relationship between the Season of Winter and the Christmas holiday (web site includes entire Planetarium Show Script):
Link >>> http://buhlplanetarium3.tripod.com/skyshow/bethlehem/

"The Stars of Winter" Sky Drama, performed at Pittsburgh's original Buhl Planetarium and Institute of Science at the beginning of each Winter season (web site includes entire Planetarium Show Script):
Link >>> http://buhlplanetarium3.tripod.com/skyshow/winter/

Related Blog Post --

Mayan Temple Damaged in Tourist ‘Apocalypse’ Frenzy (2012 December 24):

Link >>> http://spacewatchtower.blogspot.com/2012/12/mayan-temple-damaged-in-tourist.html


gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < gawalsh@planetarium.cc >
About the Author: < http://buhlplanetarium.tripod.com/#GAW >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < http://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Blog: < http://spacewatchtower.blogspot.com/ >
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 >

Close Sun-like Star May Have Habitable Planet

Closest Single Star Like Our Sun May Have Habitable Planet

Dec. 19, 2012 — An international team of astronomers led by the University of Hertfordshire has discovered that Tau Ceti, one of the closest and most Sun-like stars, may host five planets -- with one in the star's habitable zone.


Artist’s impression of the Tau Ceti system. (Credit: J. Pinfield for the RoPACS network at the University of Hertfordshire, 2012)
At a distance of twelve light years and visible with the naked eye in the evening sky, Tau Ceti is the closest single star that has the same spectral classification as our Sun. Its five planets are estimated to have masses between two and six times the mass of Earth -- making it the lowest-mass planetary system yet detected. One of the planets lies in the habitable zone of the star and has a mass around five times that of Earth, making it the smallest planet found to be orbiting in the habitable zone of any Sun-like star.

More - Link >>> http://www.sciencedaily.com/releases/2012/12/121219084102.htm?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+sciencedaily%2Fspace_time+%28ScienceDaily%3A+Space+%26+Time+News%29&utm_content=Yahoo!+Mail

Sources: University of Hertfordshire, ScienceDaily.com .

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < gawalsh@planetarium.cc >
About the Author: < http://buhlplanetarium.tripod.com/#GAW >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < http://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Blog: < http://spacewatchtower.blogspot.com/ >
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 >

Wednesday, December 19, 2012

Alan Alda: Scientists Should Learn to Talk to Children

Stephanie Pappas, LiveScience Senior Writer

Date: 19 December 2012 Time: 07:42 AM ET
alan alda at a meeting in D.C.
Alan Alda gave a presentation on the importance of science communication at the Council of Graduate Schools annual meeting held in Washington D.C., on Dec. 03, 2010.
CREDIT: Center for Communicating Science

What is time?

That's the question put to scientists this year by the Flame Challenge, a contest first conceived by actor Alan Alda, famous for his roles on the TV shows M*A*S*H and "The West Wing." The directive? For scientists to explain this complex concept in ways that will inspire and interest 11-year-old children.

The Flame Challenge gets its name from last year's inaugural competition, which posed a question from Alda's own childhood: What is flame? As an 11-year-old, Alda had asked a teacher this question and gotten back the baffling, one-word answer, "oxidation."

More - Link >>> http://www.livescience.com/25663-alan-alda-science-communication.html

Source: LiveScience.com .

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < gawalsh@planetarium.cc >
About the Author: < http://buhlplanetarium.tripod.com/#GAW >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < http://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Blog: < http://spacewatchtower.blogspot.com/ >
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 >

Backlit View of Saturn & Rings: Cassini Spacecraft

From Cassini for the Holidays: Backlit View of Saturn and Its Rings

Dec. 18, 2012 — Just in time for the holidays, NASA's Cassini spacecraft, in orbit around Saturn for more than eight years now, has delivered another glorious, backlit view of the planet Saturn and its rings.


NASA's Cassini spacecraft has delivered a glorious view of Saturn, taken while the spacecraft was in Saturn's shadow. The cameras were turned toward Saturn and the sun so that the planet and rings are backlit. (Credit: NASA/JPL-Caltech/Space Science Institute)
On Oct. 17, 2012, during its 174th orbit around the gas giant, Cassini was deliberately positioned within Saturn's shadow, a perfect location from which to look in the direction of the sun and take a backlit view of the rings and the dark side of the planet. Looking back towards the sun is a geometry referred to by planetary scientists as "high solar phase;" near the center of your target's shadow is the highest phase possible. This is a very scientifically advantageous and coveted viewing position, as it can reveal details about both the rings and atmosphere that cannot be seen in lower solar phase.

More - Link >>> http://www.sciencedaily.com/releases/2012/12/121218153633.htm?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+sciencedaily%2Fspace_time+%28ScienceDaily%3A+Space+%26+Time+News%29&utm_content=Yahoo!+Mail

Sources: Jet Propulsion Laboratory, NASA, ScienceDaily.com .

gaw

Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < gawalsh@planetarium.cc >
About the Author: < http://buhlplanetarium.tripod.com/#GAW >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.com/#news >
Twitter: < http://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/SpaceWatchtower/238017839577841?sk=wall >
Blog: < http://spacewatchtower.blogspot.com/ >
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