Marc Aaronson
Ayyukansa sun mayar da hankali kan fannoni guda uku:ƙaddarar Hubble akai-akai(H 0)ta amfani da dangantakar Tully-Fisher,nazarin taurari masu arzikin carbon,da kuma saurin rarraba waɗannan taurari a cikin dwarf spheroidal galaxies.
Ayyukansa sun mayar da hankali kan fannoni guda uku:ƙaddarar Hubble akai-akai(H 0)ta amfani da dangantakar Tully-Fisher,nazarin taurari masu arzikin carbon,da kuma saurin rarraba waɗannan taurari a cikin dwarf spheroidal galaxies.