
Link to the NES Virtual Campus home page.
Link to the NES Virtual Campus home page.
Link to the NES Virtual Campus home page.
In this episode of NASA Now, George Hatcher, guidance, navigation and controls engineer at Kennedy Space Center, explains why the upcoming launch of the space shuttle Discovery is mind-boggling from a physics perspective, even for a guidance, navigation and flight controls engineer. He will speak about the extreme accelerations and velocities involved in launching a spacecraft from Earth to orbit and return.
After 38 missions to date, and more than 5,600 trips around Earth, Discovery has flown more missions than any other shuttle — more than any other spacecraft. At the conclusion of STS-133, 180 people will have flown aboard Discovery, including the first female shuttle pilot and the first female shuttle commander, who happen to be the same person — Eileen Collins; the first African-American spacewalker, Bernard Harris; and the first sitting member of congress to fly in space, Jake Garn. Discovery will be the first of the shuttle fleet to retire.
Link to the NES Virtual Campus home page.
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NASA’s Solar Dynamics Observatory (SDO), best known for cutting-edge images of the sun, has made a discovery right here on Earth.
“It’s a new form of ice halo,” says atmospheric optics expert Les Cowley of England. “We saw it for the first time at the launch of SDO–and it is teaching us new things about how shock waves interact with clouds.”
Ice halos are rings and arcs of light that appear in the sky when sunlight shines through ice crystals in the air. A familiar example is the sundog—a rainbow-colored splash often seen to the left or right of the morning sun. Sundogs are formed by plate-shaped ice crystals drifting down from the sky like leaves fluttering from trees.
Last year, SDO destroyed a sundog—and that’s how the new halo was discovered.
Source: Science@NASA
Author: Dr. Tony Phillips
This week,the NASA Explorer Schools project enrolled its 1,000th participant. The projectincludes educators from schools in all 50 states, Washington, D.C., Puerto Rico,plus a U.S. State Department/Department of Defense school in Turkmenistan.That’s quite an accomplishment!
Enrolling 1,000teachers is an exciting milestone for NES because it means we are pursuing ourvision of actively engaging schools and partners to deliver unique andauthentic NASA experiences in science, technology, engineering and mathematicsdisciplines.
Welcome NESteachers! We hope to see more of you sharing your ideas on NEON, using Virtual Campus content, and applyingfor recognition!
On Feb. 14, 2011, NASA’s Stardust-NExT (New Exploration of Tempel 1) mission will encounter Comet Tempel 1, providing a unique opportunity to measure the dust properties of two separate comets (Wild 2 and Tempel 1) with the same instrument for accurate data comparison. The encounter also will provide a comparison between two observations of a single comet, Tempel 1, taken before and after a single orbital pass around the sun.
A search/sort function has been added to the NASA Now and Teaching Materials sections of the NASA Explorer Schools Virtual Campus. Use the check boxes to search for items designed to support specific grade levels and subjects. The sort feature also has a keywords search to help further narrow the results. Don’t overlook the Show All button if you want to peruse the entire portfolio of items. You can search on a single element or any combination of elements.
Link to the NES Virtual Campus home page.