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why is the wide-field Infrared Survey

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Explorer wise is going to find hundreds

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of millions of objects spread over the

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entire sky and for us that's like a

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treasure map we think there are about as

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many grains of sand on this Beach as

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there are stars in the entire universe

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so the task of finding rare objects in

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the universe that we're interested in

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requires the maps that wise is going to

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make it's a bit like using this metal

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detector here to try to find gold coins

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that are buried in all of this sand

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wife's consists of a fairly modest sized

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telescope about 40 centimeters in

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diameter that would sort of fit under

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your arm wise is going to survey the

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entire sky in four infrared wavelengths

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over six months all sky surveys are one

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of the basic tools that astronomers use

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to find interesting and unusual objects

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it's sort of like the GPS of astronomy

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one of the most exciting things that you

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expect to find with an all-sky survey

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likewise is the unexpected we expect

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surprises things that we have no idea

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one of the projects wise is going to be

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doing is studying the population of

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near-earth objects these are asteroids

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and comets whose orbits get close to

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Earth's orbit now this doesn't

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necessarily mean that they're going to

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hit the earth but we do want to pay some

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attention to them with wise will be able

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to tell something about how many there

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are what their sizes are and what

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they're made out of whether they're soft

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and crumbly like this ball of sand or

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solid rock like this rock right here in

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visible light an object that's small and

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shiny reflects the same amount of

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sunlight as an asteroid that's big and

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dark but when we look with an infrared

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telescope we're seeing heat that's

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emitted from more sides of the asteroid

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so we get a much better true measurement

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of the object size and this is important

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because it allows us to tell whether or

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not we're dealing with an object that's

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the maps that wise is going to be

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generating can be used to find all sorts

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of rare and unusual objects one of these

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objects is the most luminous galaxies in

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the entire universe but finding it is

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about like trying to find one particular

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one of the other rare types of objects

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that wise may find is possibly the

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nearest star to our son we think that

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there's a good chance that our son

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actually does have a closer neighbor

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than we already know about and it's

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likely to be a very cool type of star

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for the ground war the temperature may

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be room temperature or even colder pull

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with wise we expect the unexpected we're

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looking for new surprises and new

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discoveries with this exciting survey

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we're going to be finding a treasure