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Nasa rockets to track jet stream

Skywatchers along the US east coast may be able to see a Nasa experiment meant to learn more about the little-understood jet stream current at the edge of space.

Nasa plans to launch five rockets in five minutes from coastal Virginia on a clear night between March 14 and April 4.

They will release a chemical trail to track winds that circle the planet at up to 300mph in the thermosphere about 65 miles up.

Officials say the long, milky-white clouds should be visible for about 20 minutes from South Carolina to New Hampshire.

That covers major cities such as Washington, Baltimore, Philadelphia, New York and Boston, although it depends on ground lighting, cloud cover and the rockets' trajectory.

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