On Friday, Feb 15th 2013, a meteor rattled
Siberia injuring hundreds of people. The
earth has had many meteor strikes over the centuries but now a group of young scientists
and investors are working to develop a space telescope that would scan the
solar system for dangers.
Edward Lu, a
former NASA astronaut and Google executive leads a team called the B612
Foundation: “This is a wake-up call from space. We’ve got to pay attention to
what’s out there.”
Astronomers know of no asteroids or comets that pose a major
threat to the planet. But NASA estimates that fewer than 10 percent of the big
dangers have been discovered.
“Our job is to be the
first line of defense, and we take that very seriously,” James Green, the
director of planetary science at NASA headquarters, said in an interview Friday
after the Russian strike. “No one living on this planet has ever before been
hurt. That’s historic.” Dr. Green added
that the Russian episode was sure to energize scientists and that an analysis of the meteor’s remains could help reveal clues about future threats. 
Planning is underway to launch a large telescope known as
Sentinel that can find 90 percent of the asteroids larger than 460 feet in
diameter that pass through the Earth’s part of the solar system. They also want
to discover smaller asteroids down to a diameter of 100 feet. The space telescope is to have a diameter of
20 inches. The system could be ready for
launching by 2017 or 2018. Click on the link below to watch a video about the Sentinel project.
Information for this blog entry from New York Times article appearing
on Feb 17, 2013, “Vindication for Entrepreneurs Watching Sky: Yes, It Can Fall”.
EARN A REWARD!!!
Do some research at the library or online to find answers to
the following questions. Write your
answers on paper and give to Mrs D not later than Monday, Feb 25th
to EARN A REWARD!
- Where did the meteor strike in Russia? Provide the name of the city or area.
- The earth has had many meteor strikes – list the locations of at least five “major” meteor strikes. In each case, the crater must be 5 kilometers or greater in diameter.
- Besides the existence of a crater, name at least two other pieces of evidence that a scientist might find that would indicate a meteor had struck the area.
- Think Like a Scientist…. When a meteor strikes the earth, what is the result? Consider the ground, air, water, weather, wildlife. List at least five things that you believe could happen.
- Think Like a Scientist…. If you were in charge of designing a system to prevent meteors from striking the earth, how would it work? Describe your system in 100 words or less.
