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what's up for november

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magnetospheres and a mars rover launch

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hello and welcome i'm jane houston jones

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at nasa's jet propulsion laboratory in

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pasadena california

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every magnet generates a magnetic field

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and several objects in our solar system

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generate their own magnetic fields

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the magnetic field of a planet extends

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into space and is called a magnetosphere

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the sun earth mercury jupiter saturn

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uranus and neptune all have them

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earth's magnetosphere shields us from

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the constant barrage of high-energy

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particles that the sun emits the solar

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wind

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a magnetosphere protects our atmosphere

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and oceans which would otherwise

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gradually erode into space

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mars's lack of a magnetosphere may

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partly be responsible for the thinness

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this month the mars science laboratory

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also known as the curiosity rover

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launches on a 23-month mission to mars

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curiosity will study mars habitability

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using the most advanced suite of

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instruments for scientific studies ever

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sent to the martian surface the rover

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will analyze samples scooped from the

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soil and drilled from the rocks along

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with many other activities

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if you stay up late you'll be able to

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see the red planet this month

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red orange mars will be in leo near the

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blue white star regulus

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jupiter rules the skies this month

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you can't see its magnetosphere but if

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you could its apparent size from earth

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would fill a space bigger than the full

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moon

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while earth's magnetosphere is dominated

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by its interaction with the sun and the

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solar wind jupiter's is driven largely

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by the planet's fast rotation

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this month try looking for both mercury

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and venus low on the southwest horizon

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just after sunset during the first part

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of the month

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finally this is a great time to check

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out the sun and see sunspots but only

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through a safe solar telescope

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you can learn about mars missions at

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mars.nasa

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and you can learn about all of nasa's

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missions at www.nasa.gov