Astronomy Tonight

On March 24th in the world of astronomy, we celebrate the discovery of Comet Hale-Bopp, officially designated as C/1995 O1. This celestial wanderer was first spotted on July 23, 1995, but it reached i...

24 Mar 20252min

On March 23rd in the world of astronomy, one of the most significant events occurred in 1840 with the discovery of Neptune's largest moon, Triton, by British astronomer William Lassell. Lassell, a be...

23 Mar 20252min

On March 22, 1997, Comet Hale-Bopp made its closest approach to Earth, passing at a distance of about 122 million miles (196 million kilometers). This celestial event was a spectacular sight for skyga...

22 Mar 20252min

On March 21, 1610, a groundbreaking astronomical observation took place that would forever change our understanding of the cosmos. On this day, the brilliant Italian astronomer Galileo Galilei publish...

21 Mar 20252min

On March 20th, one of the most significant astronomical events occurs annually: the March equinox, also known as the vernal equinox in the Northern Hemisphere or the autumnal equinox in the Southern H...

20 Mar 20252min

On March 19th in the realm of astronomy, one of the most significant events occurred in 1982 when the Space Shuttle Columbia completed its third mission, STS-3. This mission was particularly noteworth...

19 Mar 20252min

On March 18th in the world of astronomy, one of the most significant events occurred in 1965 with the first-ever spacewalk performed by Soviet cosmonaut Alexei Leonov. This groundbreaking achievement ...

18 Mar 20251min

On March 17th, 1941, a significant event in astronomy occurred that would later be dubbed "The St. Patrick's Day Aurora." This spectacular display of the Northern Lights was so intense and widespread ...

17 Mar 20252min