100 Days Until Totality Blog Series: 73 Days Left – From the Earth to the Moon

100 Days Until Totality Blog Series: 73 Days Left – From the Earth to the Moon

You may have heard of the Hipparcos satelite. Launched in 1989 by the European Space Agency, Hipparcos was the first space instrument dedicated to measuring the accurate and precise positions of celestial objects, in particular stars. Knowing the positions of stars allows for the determination of their motions and ultimately their distances from Earth. “Hipparcos” […]

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