stellar parallax

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Statue of Liberty in front of the skyline of Manhattan, New York City, New York.

Who Was the Woman Behind the Statue of Liberty?

Calendar marking march 15th

22 Questions About Time and Timekeeping Answered

Calendar showing the month of February

Why Are There Only 28 Days in February?

Young boys working in a thread spinning mill in Macon, Georgia, 1909. Boys are so small they have to climb onto the spinning frame to reach and fix broken threads and put back empty bobbins. Child labor. Industrial revolution

The Rise of the Machines: Pros and Cons of the Industrial Revolution

Bar graph of the United States Death Toll during major events. Infogram chart.

U.S. Death Toll During Major Events

Camel at Khor Rori, Oman; mammal.

Do Camels Store Water in Their Humps?

Close up of periodic table, focus on nickel, copper, zinc, palladium, silver, cadmium

When Was the Periodic Table Invented?

stellar parallax

astronomy

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In parallax: Stellar parallax
The stars are too distant for any difference of position to be perceptible from two places on Earth’s surface, but, as Earth revolves at 149,600,000 km from the Sun, stars are seen from widely different viewpoints during the year. The effect on their…
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