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30-Dec-2019 16:16

I host this podcast called “Sex Nerd Sandra.” For over 200 episodes, I extract sex tips, techniques & titillating tidbits from unique human beings & experts. Released with Nerdist Podcast Network, my show has been downloaded over 14 million times in less than 5 years and by the looks of the emails, tweets and facebook messages I get, I’d say the sexy little snowflakes listening all over the world are pretty amazing people.I marvel at the human condition and cuddle up to the science that helps explain it. S., I laugh, just absolutely laugh at our mating dance. And although I’m a dictionarily-defined expert on the subject, each of us is the captain of our own sexuality.Its great advances notwithstanding, astronomy is still subject to a major constraint: it is inherently an observational rather than an experimental science.Almost all measurements must be performed at great distances from the objects of interest, with no control over such quantities as their temperature, pressure, or chemical composition.In the future, space missions may return surface materials from Mars, or other objects, but much of astronomy appears otherwise confined to Earth-based observations augmented by observations from orbiting satellites and long-range space probes and supplemented by theory.A central undertaking in astronomy is the determination of distances.

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Astrophysics has transformed cosmology from a purely speculative activity to a modern science capable of predictions that can be tested.Beyond the solar system, distances to the closest Hipparcos satellite in the 1990s extended the scale to stars as far as 650 parsecs, with an accuracy of about a thousandth of an arc second.