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This week on The Exchange, we hear from Siouxlanders who have lost loved ones to COVID-19 as they gather in downtown Sioux City for a memorial Monday…
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Today we will conclude the astronomical tale of how the motion of Mars arguably sparked the origin of modern astronomy and science. Last week we discussed…
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This week let’s continue the astronomical tale of how the motion of Mars arguably sparked the origin of modern astronomy and science. Last week we…
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Last week we discussed how Mars periodically exhibits retrograde motion, where the planet moves east to west relative to the background stars instead of…
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This coming summer in 2018, Mars will be spectacular in our night sky as it outshines all the stars and planets except Venus. It won’t be quite as bright…
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Today let’s conclude our visualization of the size and scale of space by trying to imagine our place in the Universe. To begin, let’s complete our “cosmic…
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Let’s continue trying to visualize the size and scale of our universe with a discussion about our Milky Way galaxy. Galaxies are large collections of…
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This week, let’s continue discussing the size and scale of things in astronomy. Our Solar System has one Sun, 8 planets, 5 dwarf planets, hundreds of…
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Last week we began a discussion about the scale of things by talking about how big the Earth is and our size on the Earth. Today, let’s talk about the…
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I find that when I talk to people about astronomy and space, one of the hardest concepts to understand is the actual scale of things in our Solar System,…