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what's up for July hello and welcome I'm

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Jane Houston Jones at NASA's Jet

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Propulsion Laboratory in Pasadena

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California 2009 is international year of

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astronomy and each month this year were

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showcasing a great celestial object this

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month it's our Milky Way galaxy Galileo

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aimed his telescope towards some of the

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fuzzy patches of our galaxy and

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discovered they were made of stars using

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ptolemies 2nd century catalog of stars

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as a starting point he observed several

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well-known star clusters like the

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beehive cluster and the Pleiades Ptolemy

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had identified the six brightest stars

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in the Pleiades but Galileo saw 36 stars

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through his telescope he drew the Stars

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using four different sizes to

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distinguish their different brightnesses

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and he published his findings in 1610

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through the next two centuries

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astronomers used bigger and bigger

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telescopes to study and map the Milky

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Way galaxy they observed nebula clusters

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and even areas where no stars could be

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seen today spacecraft and orbiting

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telescopes joined ground-based observers

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to learn more about our galaxy ESA's

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recently launched Herschel mission will

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explore the earliest stages of star and

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galaxy birth in the universe and will

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help answer questions about how our own

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Sun and milky way galaxy came to be the

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Spitzer Space Telescope created the most

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detailed infrared picture of our galaxy

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ever made and chandras images of the

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central region reveal white dwarf and

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neutron stars and black holes in a fog

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of hot gas from a dark sky you'll see

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the Milky Way rising in the East and

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spanning the sky from north to south

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after 10 p.m. local time

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back in our own solar system look for

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Saturn near the western horizon and look

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for Jupiter rising in the East about ten

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o'clock as the Milky Way spans the sky

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you can learn all about NASA's missions