August 28

1789 – Astronomer Sir William Herschel discovered Saturn's moon Enceladus.
1859 – An extremely large geomagnetic storm hits the Earth. Observed and recorded by astronomer Richard Christopher Carrington, it was the first record of a solar flare. The "Carrington event" was the strongest geomagnetic storm on record to strike the Earth.
1993 – NASA's Galileo probe performs a flyby of the asteroid "243 Ida." (Astronomers later discover a moon, the first known asteroid moon, in pictures from the flyby and name it "Dactyl.")
1999 – Russian space mission Soyuz TM-29 reaches completion, ending nearly 10 years of continuous occupation on the space station Mir as it approaches the end of its life.

2403 – Alexander Lorien is assigned as commanding officer of the USS Gettysburg, BC-1863.