1 6 5 9 ▁in ▁science ▁and ▁technology ▁involved ▁some ▁significant ▁events . ▁ ▁Astronom y ▁ ▁Christ ia an ▁Hu yg ens ▁publish es ▁System a ▁Sat urn ium , ▁including ▁the ▁first ▁illustr ation ▁of ▁the ▁Or ion ▁Neb ula . ▁ ▁Mathemat ics ▁ ▁First ▁known ▁use ▁of ▁the ▁term ▁Ab sc issa , ▁by ▁Stef ano ▁degli ▁Ang eli . ▁ ▁Swiss ▁math ematic ian ▁Johann ▁R ahn ▁publish es ▁Te utsch e ▁Al gebra , ▁containing ▁the ▁first ▁printed ▁use ▁of ▁the ▁' div ision ▁sign ' ▁( ÷ , ▁a ▁rep ur posed ▁ob el us ▁variant ) ▁as ▁a ▁mathematical ▁symbol ▁for ▁division ▁and ▁of ▁the ▁' there fore ▁sign ' ▁( <0xE2> <0x88> <0xB4> ). ▁ ▁Medicine ▁ ▁Thomas ▁Will is ▁publish es ▁De ▁Feb rib us . ▁ ▁Physics ▁ ▁Christ ia an ▁Hu yg ens ▁der ives ▁the ▁formula ▁for ▁cent rip ed al ▁force . ▁ ▁B irth s ▁ ▁February ▁ 2 7 ▁– ▁William ▁Sher ard , ▁English ▁botan ist ▁( d ied ▁ 1 7 2 8 ) ▁ ▁June ▁ 3 ▁– ▁David ▁Gregory , ▁Scottish ▁astronom er ▁( d ied ▁ 1 7 0 8 ) ▁ ▁Death s ▁ ▁October ▁ 1 0 ▁– ▁Ab el ▁Tas man , ▁Dutch ▁expl orer ▁( born ▁ 1 6 0 3 ) ▁ ▁References ▁ ▁Category : 1 6 5 9 ▁in ▁science ▁Category : 1 7 th ▁century ▁in ▁science ▁Category : 1 6 5 0 s