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Measuring and evaluating the brightness of stars can be traced back to the Greek astronomer and mathematician Hipparchus during 190 - 120 BC. He is responsible for producing a catalogue of comparative brightness and positioning of over 850 stars. Hipparchus formed the apparent magnitude scale to determine the brightness of a star as seen by an observer from earth.

How does this scale work? The brighter the celestial object appears, the lower the value of its magnitude. For instance, the faintest objects you can see using the naked eye are indicated with a magnitude of 6, while the Sun on the apparent magnitude scale is –26.74. However, most of the stars we gaze at in an urban neighborhood with our eyes are usually somewhere around 3 to 4 and if using binoculars, the limit is 10. More recently, through the use of the powerful Hubble Space Telescope, astronomers have located stars with magnitudes of 30+. It is this basic classification from over 2,000 years ago that led to the magnitude scale that we still use today!


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Discovered in 1986 by Australian astronomer Malcolm Hartley, comet 103P or Hartley 2 is set for the closest encounter with earth in 24 years. This “dirty snowball” that is comprised of rock, dust, ice and frozen gases was visible in the constellation of Auriga as a fuzzy, green blur to Northern Hemisphere observers during Mid-October.

Through November, Southern Hemisphere stargazers can catch a glimpse of the comet as it travels away from earth, using the naked eye, binoculars and of course, a telescope. This year, Hartley 2 made its closest pass at a mere 11 million miles on October 20th and is calculated to orbit the Sun every 6 ½ years. EPOXI, or Extrasolar Planet Observation and Deep Impact Extended Investigation is a spacecraft that is due to make a flyby of Hartley 2 from only 600 miles away on November 4th. The mission plans to gather information on the comet’s surface and craters, as well as close-up images of dust and gas plumes.

Check back on our web site for "post fly by" information and updates!


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Explore the Science of Monsterology

A fun, safe place to trick or treat for the whole family
Sunday, October 31, 12:00 - 4:00 p.m.

Orlando, FL - October 22, 2010 - Are you looking for a safe place to take your children during the spookiest time of the year? Kick off Halloween with a fun filled family event at the Orlando Science Center’s Seventh Annual Spooktacular Science Extravaganza. On Sunday, October 31, from 12:00 p.m. to 4:00 p.m., come join us for a whole days’ worth of activities and events that provides a safe environment for little phantoms to explore the science of Monsterology.

Experience the true essence of Halloween by coming to the Orlando Science Center dressed up in your scariest, creepiest and most ghoulish costume. Listen to Halloween music throughout the building as you learn how to make “Ghost Goop”, have an educational team demonstration about snakes and scorpions, witness a Gator creature feeding, learn all about blood, scabs and bruising and let out your inner spooky scientist as you watch experiments about dry ice and liquid nitrogen.

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It’s Also Walmart $5 Day! See Everything at the Science Center for Only $5

All the exhibits, films and live programs plus all the eco-friendly activities, thanks to the Walmart Foundation
Saturday, October 16 only, 10:00 a.m. - 5:00 p.m.

WHO: Guests coming to the Orlando Science Center for Greenovations will get to make cookies using solar ovens!

WHAT: During Walmart $5 Day, all visitors get in for only $5 and get access to all the Science Center’s engaging exhibits and films plus enjoy activities and displays during Greenovations - a day-long exploration of renewable energy and green living.

WHEN: Saturday, October 16 - 10:00 a.m. to 5:00 p.m.

WHERE: Orlando Science Center, 777 East Princeton Street, Orlando - Solar Ovens will be set up on the fourth floor terrace.

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As of January 31 2009, 49 percent of the total pounds of fresh or frozen seafood sold at Walmart U.S. have certifications from the Marine Stewardship Council or Aquaculture Certification Council.

Walmart currently has:

  • 28 products and counting in our stores that carry the MSC certification
  • 100 percent of the farmed shrimp products purchased meet factory processing criteria established by the Aquaculture Certification Council
  • Additional shrimp catfish, tilapia and salmon farms becoming ACC-certified


Learn more about Walmarts sustainability efforts and how to be more green in your life at Greenovations.

 


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In 2008, Walmart committed to reduce the weight of its global plastic shopping bag waste at its stores around the world by an average of 33 percent per store.

This commitment could eliminate:

  • Approximately 135 million pounds of plastic shopping bag waste globally
  • Avoid the production of approximately 290,000 metric tons of greenhouse gases
  • Prevent consuming the equivalent of 678,000 barrels of oil every year


Learn more about Walmart's efforts to help the environment and about sustainability in general at Greenovations.

 


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Fun Activities, Electric Cars, Segways, the Worm Lady and Much More

Saturday, October 16, 10:00 a.m. - 5:00 p.m.
See how you can start erasing your carbon footprint

ORLANDO, FL - October 08, 2010 - Join the Green Revolution at Orlando Science Center on Saturday, October 16. From 10 a.m. to 5 p.m., exhibits, seminars, workshops, speakers, films and more will highlight the fast-developing world of clean, renewable energy, recycling and energy efficient technology. Activities and displays on the various levels of the Science Center will help educate and provide examples of alternative behaviors and resources to live a “greener” life. Greenovations is presented by OUC - The Reliable One with support from many community partners.

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777 E. Princeton Street • Orlando, Florida 32803 • Phone: 407.514.2000 • TTY: 407.514.2005 • Toll Free: 888.OSC.4FUN • Email: gservices@osc.org
  Orlando Science Center is supported by United Arts of Central Florida, host of power2give.org/centralflorida and the collaborative Campaign for the Arts.
This project is funded in part by Orange County Government through the Arts & Cultural Affairs Program. Privacy Policy • Accessibility