◆ On this day

January 7

3 sourced moments from January 7 in history: Galileo found Jupiter's four big moons in January 1610; First flight across the English Channel by balloon (1785); and The First Transatlantic Phone Call (1927).

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3 things happened on January 7

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1927 Technology · media-communication

The First Transatlantic Phone Call

In 1927, a voice crossed 3,000 miles of ocean by radio, linking New York and London for the very first time.

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1785 Technology · Transportation

First flight across the English Channel by balloon

Two men crossed the Channel in a hydrogen balloon and nearly drowned, saved only by ditching the cargo and their own clothes.

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1610 Space · Solar System

Galileo found Jupiter's four big moons in January 1610

Galileo first took Jupiter's moons for stars. His night-by-night sketches show how, over one week in 1610, he realised they were orbiting Jupiter.

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