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[Music]

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what's up for july

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the planets at dawn

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the dog days of summer and the teapot

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points to the center of the milky way

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the planets mars jupiter and saturn

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dominate morning skies in july

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venus is there as well but appears low

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in the east so you'll need a clear view

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toward the horizon to see it

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the planets are spread out across the

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morning sky accompanied by bright stars

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capella aldebaran and fomalhaut on the

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20th look for the half full last quarter

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moon between mars and jupiter

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and the following morning you'll find

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the moon sitting right next to mars

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july is a time for sweltering hot

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weather here in the northern hemisphere

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and you may have heard this time of year

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referred to as the dog days of summer

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well that phrase actually dates back to

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ancient times and has to do with the

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brightest star in the sky sirius

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at the peak of summer the sun lies in

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the same part of the sky as sirius which

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the ancient greeks and romans associated

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with the dog-shaped constellation canis

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major just as we do today

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sirius is its most prominent star and

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it's sometimes called the dongstar in

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ancient greek sirius means the scorcher

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and both the greeks and romans believed

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the blazing bright star's proximity in

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the sky added to the sun's heat during

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that time of year making it even more

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oppressive

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so they called this hot time of year the

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dog days

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of course today we know the only star

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close enough to affect our temperatures

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on earth is the sun and the heat we

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experience in july is the result of the

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northern hemisphere being tilted toward

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the sun this yields longer days and more

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direct sunlight and thus warmer weather

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the situation is reversed in the

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southern hemisphere where july is right

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in the middle of winter

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facing southward on july nights after

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sunset you'll find a sky teeming with

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bright stars

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looking in that direction in the evening

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this time of year you're facing the

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center of our galaxy the milky way there

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are quite a number of bright stars in

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that part of the sky particularly in the

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constellation scorpius and sagittarius

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now if you find yourself under dark

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skies you'll be able to fully enjoy the

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milky way core

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densely packed with stars and clouds of

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dust and gas it's dazzling this time of

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year and it's visible toward the south

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as soon as it gets fully dark out but

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even if you're under urban skies too

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bright to observe the milky way the

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group of stars in sagittarius known as

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the teapot will help you pinpoint its

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location on the sky

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the teapot is a well-known asterism or

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pattern of stars and like scorpius the

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scorpion nearby once you're familiar

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with it it's hard not to see a teapot

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there in the sky

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the galaxy's core lies just right of the

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stars in the teapot's spout over the

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course of the night it appears to tilt

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as though its spout is pouring out a

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cosmic cuppa and under dark skies the

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milky way appears as a plume of steam

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rising from the spout

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so here's hoping you get a chance to

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enjoy the milky way in july or at least

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that you find your way to the galaxy's

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core thanks to the teapot

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here are the phases of the moon for july

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stay up to date with all of nasa's

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missions to explore the solar system and

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i'm preston dykes from nasa's jet