Wednesday, June 20, 2012

Heat Wave!

Pardon the bad pun connecting today's and tomorrow's mini-heat-wave and global warming/climate change. Whatever your informed opinion on the matter (climate change), the article below elaborates on a noble goal of the world's megacity-mayors.


Megacities Slash Greenhouse Gases, Share Best Practices
RIO de JANEIRO, Brazil, June 19, 2012 (ENS) - Mayors of the world's megacities today announced that the existing actions of the cities in their organization, the C40 Cities Climate Leadership Group, will reduce greenhouse gas emissions by 248 million tonnes a year by 2020.
Based on new data released today, the mayors said the annual reduction could amount to more than one billion tonnes by 2030, equivalent to the annual greenhouse gas emissions of Mexico and Canada combined.
The announcement was made by Rio de Janeiro Mayor Eduardo Paes and C40 Cities Chairman New York Mayor Michael Bloomberg during the organization's annual meeting, taking place parallel to the UN's sustainable development summit, Rio+20, which is happening in the city all week.
C40 Cities mayors in Rio, from left: Lagos Mayor Babatunde Fashola, Johannesburg Mayor Mpho Franklyn Tau, New York Mayor Michael Bloomberg, Rio Mayor Eduardo Paes, Buenos Aires Mayor Mauricio Macri, Sao Paulo Mayor Gilberto Kassab, June 19, 2012. (Photo courtesy C40 Cities)
"I am encouraged that we, as mayors and citizens, are implementing plans to promote change and reduce carbon emissions in an effort to halt climate change," said Mayor Paes. "When mobilized as one, cities wield sufficient collective power to influence opinion and nudge policy further up the legislative agenda."
"Cities have more freedom than nation states to put into place progressive strategies that are already changing people's lives and today's announcement is testament to the action and unity that is thriving at a municipal level around the globe," the Rio mayor said.
C40 Cities includes 58 of the world's largest cities. Inhabited by one in every 12 people on Earth, they account for approximately 14 percent of global greenhouse gas emissions, according to recent reports by the Carbon Disclosure Project and the UK-based consulting firm Arup.
The C40 mayors today announced two new initiatives.
First, C40 Cities will establish a new solid waste peer-to-peer learning network to assist local governments to reduce methane emissions through solid waste management.
Methane is a greenhouse gas with many times the potency of carbon dioxide, the most abundant greenhouse gas. Landfill methane can be collected and used to generate electricity, as a fuel for industrial purposes, or enriched and sold to gas pipelines.
With support from the World Bank and the Climate and Clean Air Initiative of the U.S. State Department, C40 partners will provide technical assistance to help cities cut methane gas production.
"Mayors and cities don't have the luxury of just sitting around and talking about problems because on a whole range of critical issues, the buck stops at City Hall," said Mayor Bloomberg. "Because of mayors' commitment to action, cities are making great progress in reducing greenhouse gases, which helps beat back climate change and makes our cities better, more liveable places. The data we are releasing today is more evidence that cities have been and will continue to lead the way."
Rio de Janeiro, population 6.3 million, is Brazil's second largest city, after Sao Paulo. (Photo by arigerdes)
C40 cities have undertaken 4,734 climate-related actions since the network was formed in 2005. Research by the Carbon Disclosure Project shows that cities are financing many of their climate change actions without external support, as 64 percent of city initiatives are funded through general municipal funds.
In Rio, the mayors are calling on national governments and international organizations to provide more financing and policy support for local climate actions.
Second, the mayors announced today that the best practices of all C40 Cities will now be shared with the world through a new library on the newly launched C40 website: www.C40.org.
The sharing of best practices started 18 months ago as the Joint Initiative on Urban Sustainability, a pilot exchange program between the C40 cities of Rio and Philadelphia, Pennsylvania, conducted with the support of the U.S. Environmental Protection Agency. Philadelphia Mayor Michael Nutter this week was named president of the U.S. Conference of Mayors.
Governor of Jakarta Fauzi Bowo welcomed the two initiatives, saying, "Any partnership which allows sharing of knowledge and best practices aiming to fight climate change is crucial in order that greenhouse gas emissions are reduced."
"Different cities face different challenges in confronting climate change," said Governor Bowo. "The basic approach Jakarta has taken in reducing greenhouse gas emissions has been a holistic approach based on the basic policy implemented in managing Jakarta, which is pro-poor, pro-jobs, pro growth and pro-environment. These four factors cannot be separated from each other."
The C40 Cities Climate Leadership Group works in partnership with the Clinton Climate Initiative, a program of the William J. Clinton Foundation.
Former U.S. President Bill Clinton, a founding C40 Cities partner, joined today's event by videoconference.
"My foundation has been working since 2006 with the mayors of many large cities around the world to help them reduce their greenhouse gas emissions," Clinton said. "Today's announcements prove that, through creative partnerships, we can help reduce our carbon output to protect our environment and create jobs to grow our economies."

Sunday, June 17, 2012

They Keep Going, And Going, And Going...

NASA's Voyager probes continue their trek through the outermost reaches of our solar system.  However, recent data point to their nearing the edge of our sun's region of influence.  The limit of our sun's influence is called the heliosheath; this is where our sun's solar wind collides with interstellar solar winds.  Voyager 1 has traveled about 9.1 billion miles!

The article in ScienceDaily.com appears below.  Here is the link to the article on the NASA website:
NASA Voyager Article


Data from NASA's Voyager 1 Point to Interstellar Future

ScienceDaily (June 15, 2012) — Data from NASA's Voyager 1 spacecraft indicate that the venerable deep-space explorer has encountered a region in space where the intensity of charged particles from beyond our solar system has markedly increased. Voyager scientists looking at this rapid rise draw closer to an inevitable but historic conclusion -- that humanity's first emissary to interstellar space is on the edge of our solar system.
"The laws of physics say that someday Voyager will become the first human-made object to enter interstellar space, but we still do not know exactly when that someday will be," said Ed Stone, Voyager project scientist at the California Institute of Technology in Pasadena. "The latest data indicate that we are clearly in a new region where things are changing more quickly. It is very exciting. We are approaching the solar system's frontier."
The data making the 16-hour-38 minute, 11.1-billion-mile (17.8-billion-kilometer), journey from Voyager 1 to antennas of NASA's Deep Space Network on Earth detail the number of charged particles measured by the two High Energy telescopes aboard the 34-year-old spacecraft. These energetic particles were generated when stars in our cosmic neighborhood went supernova.
"From January 2009 to January 2012, there had been a gradual increase of about 25 percent in the amount of galactic cosmic rays Voyager was encountering," said Stone. "More recently, we have seen very rapid escalation in that part of the energy spectrum. Beginning on May 7, the cosmic ray hits have increased five percent in a week and nine percent in a month."
This marked increase is one of a triad of data sets which need to make significant swings of the needle to indicate a new era in space exploration. The second important measure from the spacecraft's two telescopes is the intensity of energetic particles generated inside the heliosphere, the bubble of charged particles the sun blows around itself. While there has been a slow decline in the measurements of these energetic particles, they have not dropped off precipitously, which could be expected when Voyager breaks through the solar boundary.
The final data set that Voyager scientists believe will reveal a major change is the measurement in the direction of the magnetic field lines surrounding the spacecraft. While Voyager is still within the heliosphere, these field lines run east-west. When it passes into interstellar space, the team expects Voyager will find that the magnetic field lines orient in a more north-south direction. Such analysis will take weeks, and the Voyager team is currently crunching the numbers of its latest data set.
"When the Voyagers launched in 1977, the space age was all of 20 years old," said Stone. "Many of us on the team dreamed of reaching interstellar space, but we really had no way of knowing how long a journey it would be -- or if these two vehicles that we invested so much time and energy in would operate long enough to reach it."
Launched in 1977, Voyager 1 and 2 are in good health. Voyager 2 is more than 9.1 billion miles (14.7 billion kilometers) away from the sun. Both are operating as part of the Voyager Interstellar Mission, an extended mission to explore the solar system outside the neighborhood of the outer planets and beyond. NASA's Voyagers are the two most distant active representatives of humanity and its desire to explore.
The Voyager spacecraft were built by NASA's Jet Propulsion Laboratory in Pasadena, Calif., which continues to operate both. JPL is a division of the California Institute of Technology. The Voyager missions are a part of the NASA Heliophysics System Observatory, sponsored by the Heliophysics Division of the Science Mission Directorate in Washington.
For more information about the Voyager spacecraft, visit:http://www.nasa.gov/voyager .
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The above story is reprinted from materials provided byNASA/Jet Propulsion Laboratory.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.

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NASA/Jet Propulsion Laboratory (2012, June 15). Data from NASA's Voyager 1 point to interstellar future. ScienceDaily. Retrieved June 17, 2012, from http://www.sciencedaily.com­/releases/2012/06/120615114827.htm
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Monday, June 4, 2012

Transit of Venus Tomorrow




Just a reminder, gentlemen, that tomorrow will be the 2nd and last opportunity of our lifetimes to view a transit of Venus.  The transit will begin at 6:04 EDT, and will be visible through sunset tomorrow.  We will not have the opportunity to see the entire phenomenon.

In case the weather doesn't cooperate, which is looking likely at this point, here are a few helpful websites.

Sky & Telescope - Transit Article and Viewing Tips

W.M. Keck Observatory - Live Web Stream for Transit  Click on the homepage's link to the live stream of the transit tomorrow.

NASA - Official Transit of Venus Webpage  There are links to multiple live streams of the transit.

If you don't have safe viewing equipment, consider making a pinhole camera for safely viewing the transit tomorrow.  Pinhole Camera Directions (Latin = Camera Obscura)  ALWAYS BE OVERLY CAUTIOUS ABOUT OBSERVING THE SUN; YOU CAN QUICKLY DO PERMANENT DAMAGE TO YOUR EYES!


To build the simplest pinhole camera of all, you need two sheets of heavy paper.  Poke a pinhole in one sheet (or use a piece of carboard and some aluminum foil).  Use the 2nd sheet of white paper as your "projection screen."  Change the distance between the two to bring the image into focus.  You can use your pinhole camera to make cool images of many things in nature, including trees and other shadows.

In addition, if you have a pair of binoculars, you can project an image of the sun on a sheet of paper.  NEVER LOOK DIRECTLY AT THE SUN THROUGH BINOCULARS OR A TELESCOPE WITHOUT THE PROPER FILTERS.

Good luck!

Friday, June 1, 2012

Transit of Venus

Just a reminder that the 2nd and last transit of Venus during our lifetimes will take place this coming Tuesday.  The ingress of the transit will begin at 6:04 pm on Tuesday, June 5.  We will be able to view it until sunset, approximately 2 hours later.

Here's a link to another NASA webpage about the transit.  NASA - Transit of Venus

In order to safely view the transit, you need either #14 welder's glass or special eclipse filters.  Be very careful when observing the sun.

The next transit of Venus will take place in 2117.