EntityQ2256711· pop 8· linked from 22 articlesMichael A'HearnSign in to saveAmerican astronomer and professor (1940-2017)ConnectionsastronomyEntityMarylandEntitycometEntityNASAConceptdigital object identifierEntityInternational Standard Serial NumberEntityThe Washington PostEntityWilmingtonEntityInternational Astronomical UnionEntityplanetary scienceEntityRosettaEntity67P/Churyumov–GerasimenkoEntitybibcodeEntityComet Shoemaker–Levy 9EntityUniversity of Wisconsin–MadisonEntitydoctorateEntityBachelor of ArtsEntityBraintreeEntitythesisEntityUniversity of MarylandEntityCategories1940 births2017 deaths20th-century American astronomersMorrissey College of Arts & Sciences alumniPeople from Wilmington, DelawareUniversity of Maryland, College Park facultyUniversity of Wisconsin–Madison College of Letters and Science alumni