▁translation ▁of ▁Charles ▁Bon net ' s ▁book ▁Cont empl ation ▁de ▁la ▁Nature . ▁In ▁part ▁because ▁of ▁this ▁law , ▁the ▁first ▁four ▁minor ▁plan ets ▁were ▁at ▁first ▁l abeled ▁as ▁full - f led ged ▁plan ets . ▁After ▁a ▁fifteen - year ▁hi atus , ▁other ▁minor ▁plan ets ▁started ▁to ▁be ▁discovered ▁at ▁stead ily ▁increasing ▁rates , ▁and ▁Cer es ▁and ▁company ▁were ▁eventually ▁rel abeled ▁as ▁minor ▁plan ets ▁or ▁astero ids . ▁Because ▁of ▁its ▁spher ical ▁shape , ▁Cer es ▁has ▁had ▁upgrad ed ▁status ▁as ▁a ▁d war f ▁planet ▁since ▁ 2 0 0 6 . ▁ ▁The ▁astero id ▁ 1 9 9 8 ▁Tit ius ▁and ▁the ▁cr ater ▁Tit ius ▁on ▁the ▁Moon ▁are ▁named ▁in ▁his ▁honour . ▁ ▁Physics ▁ ▁Tit ius ▁published ▁a ▁number ▁of ▁works ▁on ▁other ▁areas ▁in ▁Physics , ▁such ▁as ▁a ▁set ▁of ▁conditions ▁and ▁rules ▁for ▁performing ▁experiments , ▁and ▁he ▁was ▁particularly ▁focused ▁in ▁therm ometry . ▁In ▁ 1 7 6 5 ▁he ▁presented ▁a ▁survey ▁of ▁therm ometry ▁up ▁to ▁that ▁date . ▁He ▁wrote ▁about ▁the ▁met all ic ▁therm ometer ▁constructed ▁by ▁Hann s ▁Lo es er . ▁In ▁his ▁treat ises ▁on ▁both ▁theoretical ▁and ▁experimental ▁physics , ▁he ▁incorpor ated ▁the ▁find ings ▁of ▁other ▁scient ists , ▁such ▁as ▁the ▁descri ptions ▁of ▁experiments ▁written ▁by ▁Georg ▁Wolfgang ▁Kraft ▁in ▁ 1 7 3 8 . ▁ ▁Bi ology ▁ ▁Tit ius