Multiple choice

Neptune (planet)

  1. 1846

  2. 1840

  3. 1876

  4. 1850

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Neptune was discovered on September 23, 1846 by Johann Gottfried Galle, based on mathematical predictions by Urbain Le Verrier. The discovery confirmed the existence of an eighth planet beyond Uranus.