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Do Now
Do you think it is important for scientists to be searching for signs of extraterrestrial life? Why or why not?
Intro
On December 5, 2011, NASA announced the discovery of a planet in a “habitable zone”—a region around a star that is the right temperature (not too hot and not too cold) for liquid water to exist. This planet, called Kepler-22b, is the first to be found that approximates Earth in its size and distance from its sun.
The purpose of NASA’s Kepler Mission is to survey part of the Milky Way galaxy to find Earth-size planets in the habitable zone and figure out how many of the stars in our galaxy have planets like this. This is done using a specially-designed spacecraft telescope (called “Kepler”). The Kepler mission will last a minimum of 3 ½ years and costs about $600 million.
The SETI Institute is a non-profit organization with the mission of searching for signs of extra terrestrial life. It has been in existence since 1985 and manages the Allen Telescope Array, This grouping of telescopes, located in Shasta County, California, searches our galaxy and other galaxies for radio signals that would suggest that life exists elsewhere in the Universe.
Resource
NPR segment Found: Earth-Like Planet That Might Be Right For Life.
Scientists have discovered a planet not too much bigger than Earth that's circling a distant star that's much like our own sun. What's more, this planet is in the "Goldilocks zone" around that star — a region that's not too hot and not too cold. That's the kind of place that could be home to liquid water and maybe even life.
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More Resources for Follow-up Lessons
QUEST's Planet Hunters on PBS LearningMedia The Inhabitable Zone:
The search for life on distant planets in the universe has spurred scientists to more carefully explore the conditions of our own planet Earth and what characteristics and conditions allow us to live in relative balance within the structure of the solar system.
QUEST segment SETI: The New Search for ET
Is anyone out there? For over 40 years scientists have been searching for extraterrestrial intelligence, but they've found nothing. Now the new Allen Telescope Array, a string of 350 radio telescopes, is being built 300 miles north of San Francisco and is breathing new life into the search. Find out why SETI scientists now say we might be hearing from ET sooner than you think.
Join KQED and CSTA for one of four area specific science webinars and learn the ropes around PBS LearningMedia, a collection of thousands of digital media resources from KQED and other public media stations for the K-12 science classroom. Experienced science educators give an example of a media-rich lesson and present strategies for successfully incorporating multimedia into the classroom.
