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The year 2009 in science involves some significant events.

Events

Scientific events scheduled to occur in the year 2009 include:

• January 26 - Annular solar eclipse.
• February 1 - The International Cospas-Sarsat Satellite System is scheduled to stop monitoring for 121.5 MHz and 243 MHz (Class B) distress signals from EPIRBs and other emergency beacons.
• February 13 - A celebration is expected as the Unix time number reaches 1234567890 seconds at 23:31:30 UTC.
• February 17 - Analog television broadcasts are scheduled to end in the United States, requiring all stations to send their signals digitally.
• July 22 - Total solar eclipse (longest lasting total eclipse of the 21st century).
• September 29 - NASA's MESSENGER spacecraft makes its final flyby of Mercury, decreasing velocity enough for an orbital capture in 2011.