If Solar Flares Pose a Danger to Orbiting Spacecraft and Astronauts,how

question 9

Multiple Choice

If solar flares pose a danger to orbiting spacecraft and astronauts,how much warning is there for the danger?

• A)There is no warning; the radiation arrives at the same time as the feature is observed because they all travel at the speed of light.
• B)The primary danger is from high energy particles that travel at the speed of the solar wind 500km/s,so there is ample warning of 3-5 days.
• C)The danger is from high energy particles moving thousands of km per second,so the warning is a few hours.
• D)The danger is primarily from emission of neutrinos,which move at just below the speed of light; hence the warning is only a few seconds after a feature is observed.

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