Yohann Galle German astronomer who discovered the planet Neptune in 1846 using coordinates calculated by the Frenchman Le Verrier. Date of Birth: 09.06.1812 Country: Germany

1. Biography of Johann Gottfried Galle
2. Early Career
3. Discovery of Neptune
4. Later Career and Contributions
5. Conclusion

Biography of Johann Gottfried Galle

Johann Gottfried Galle (June 9, 1812 – July 10, 1910) was a German astronomer at the Berlin Observatory. He is best known for his discovery of the planet Neptune in 1846, based on calculations made by French mathematician Urbain Le Verrier.

Early Career

Johann Gottfried Galle began his career as an assistant to Johann Franz Encke at the Berlin Observatory in 1835. During this time, he focused on studying comets and made his own discoveries. In fact, he identified three comets within a short period from December 2, 1839, to March 6, 1840.

Discovery of Neptune

Galle's most significant contribution to astronomy came on September 23, 1846, when he observed and confirmed the existence of the planet Neptune. This breakthrough was made possible by Le Verrier's calculations, which predicted the presence of an unknown planet based on observed irregularities in Uranus's orbit.

After receiving a letter from Le Verrier on September 18, 1846, Galle was instructed to search for the predicted planet in a specific area of the sky. With the permission of Encke, Galle began his observations and quickly located an object that matched the described characteristics. Over the next two evenings, further observations confirmed that this object was indeed a planet.

Later Career and Contributions

In 1851, Galle relocated to Breslau (now Wrocław, Poland) to become a professor of astronomy and the director of the local observatory. Throughout his career, he continued to study comets and published a catalog of 414 comets in 1894, with the assistance of his son Andreas Galle.

Galle's work and discoveries earned him recognition and honors. In his honor, a crater on the Moon and Mars were named after him, as well as a ring around Neptune. His doctoral thesis, completed in 1845, focused on a critical discussion of Ole Rømer's observations of Uranus in 1706.

Conclusion

Johann Gottfried Galle's role in the discovery of Neptune solidified his place in the history of astronomy. His dedication to studying comets and his collaboration with Le Verrier showcased his significant contributions to the field. Galle's work continues to inspire and influence astronomers to this day.