wonders-of-the-cosmos:

It’s 13 March. On this day in 1781 Uranus was discovered by William Herschel.

March 13, 1781. The seventh planet – Uranus – was discovered on this date, completely by accident. British astronomer William Herschel was performing a survey of all stars of at least magnitude 8 – stars slightly too faint to be seen with the eye alone, in other words. That’s when he noticed a very faint object – only barely above the limit for viewing with the eye – that that moved in front of the fixed stars. 

This movement clearly demonstrated the object was closer to us than the stars. At first he thought he had found a comet. Later, he and others realized it was a new planet in orbit around our sun, the first new planet discovered since ancient times

William Herschel announced its discovery on March 13, 1781, expanding the known boundaries of the Solar System for the first time in history and making Uranus the first planet discovered with a telescope.

NASA’s Voyager 2 spacecraft flew closely past distant Uranus, the seventh planet from the Sun, in January 1986. 

Voyager 2 radioed thousands of images and voluminous amounts of other scientific data on the planet, its moons, rings, atmosphere, interior and the magnetic environment surrounding Uranus.

Image credit: NASA / JPL / Voyager (read more) (William Herschel)