RT @sciencemuseum: The transit of Venus was observed for the 1st time #OnThisDay, by Jeremiah Horrocks in 1639. Pic from our Library. https://t.co/esAveBppEf
RT @sciencemuseum: The transit of Venus was observed for the 1st time #OnThisDay, by Jeremiah Horrocks in 1639. Pic from our Library. https://t.co/esAveBppEf