On this day: January 7

Posted: 5:29 AM EST Jan 05, 2013   Updated: 2:00 AM EST Jan 07, 2015

Galileo spots some of Jupiter's moons, the Harlem Globetrotters play their first game, Truman announces the development of the H-bomb, and President Clinton's impeachment trial begins, all on this day.

OTD January 7 - Katy Perry
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Capitol Records

2012: Katy Perry's album "Teenage Dream" becomes the first album in history to have seven songs from the same album reach No. 1 on the Billboard Hot Dance Club Songs chart. This was official as soon as the single "The One That Got Away" hit No. 1. The previous six singles to reach No. 1 on the chart were "California Gurls," "Teenage Dream," "Peacock," "Firework," "E.T." and "Last Friday Night (T.G.I.F.)."


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  • Washington Monument, Washington DC

    Paul Courson/CNN

    On this day: October 9

    The Washington Monument opens to the public, John Lennon is born, Che Guevara is executed, and President Barack Obama wins the Nobel Peace Prize, all on this day.