Aristarchus

American  

[ar-uh-stahr-kuhs] / ˌær əˈstɑr kəs /

noun

1. of Samos. late 3rd century b.c., Greek astronomer.

2. of Samothrace. c216–144 b.c., Greek philologist and critic.

3. an extremely bright crater in the second quadrant of the face of the moon: about 29 miles (47 km) in diameter from crest to crest.

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Aristarchus British  

/ ˌærɪˈstɑːkəs /

noun

1. a crater in the NE quadrant of the moon, having a diameter of about 37 kilometres, which is the brightest formation on the moon

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Example Sentences

Remote observations show that distant ejecta in CE-5 regolith mainly come from four impact craters, and the Aristarchus crater is the youngest among the four distant craters.

From Science Daily • Feb. 6, 2024

At the 2-kilometer-tall Aristarchus plateau, scientists want to study abundant volcanic ash deposits, which were created in explosive, gas-driven eruptions, a rarity on the moon.

From Science Magazine • Nov. 19, 2018

Among them was a letter from US Founding Father John Jay to George Washington, dated 1781, and another letter sent to King George III by a spy named Aristarchus.

From BBC • Apr. 1, 2015

Aristarchus Plateau is the primary location for these transient events, says Crotts, followed by the craters of Plato, Grimaldi, Kepler, Copernicus and Tycho.

From Forbes • Apr. 1, 2013

Between the times of Aristarchus and Huygens, humans answered the question that had so excited me as a boy growing up in Brooklyn: What are the stars?

From "Cosmos" by Carl Sagan