stellar parallax

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Ruminant. Deer. Red deer. Cervus elaphus. Buck. Stag. Antlers.

9 of the World’s Deadliest Mammals

Lead image for "A Timeline of the World in 8 Maps"

A Timeline of the World in 8 Maps

Calendar showing the month of February

Why Are There Only 28 Days in February?

solar eclipse, sun, moon, astronomy, space

How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipses?

Moonrise over Tucson, Arizona

Why Doesn’t Arizona Observe Daylight Saving Time?

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

When Was the Periodic Table Invented?

Camel at Khor Rori, Oman; mammal.

Do Camels Store Water in Their Humps?

stellar parallax

astronomy

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major reference

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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