events
Sputnik 1, the first artificial Earth satellite, launched by the Soviet Union in 1957, falls to Earth from orbit.
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Sputnik 1
First artificial Earth satellite
Sputnik 1, sometimes referred to as simply Sputnik, was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program. It sent a radio signal back to Earth for three weeks before…Source: Wikipedia (CC BY-SA)
Earth
Third planet from the Sun
Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering…Source: Wikipedia (CC BY-SA)
January 4
Day of the year
January 4 is the fourth day of the year in the Gregorian calendar; 361 days remain until the end of the year.Source: Wikipedia (CC BY-SA)