They use Satellites, telescopes, and they have even sent some men out into space to get close to the planet and study it. akjdflkajdfhglkjdhfgkljsdfhgkdjfhglksdjghYOURMOMlkdjflskdjf cneuvdunvdunv don't you dare improve this answer!!!! I am sitting right next to you and I will RAMballsack you in the face!
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x rays
No one has yet travelled to Jupiter.
scientist study astronomy and when the world ends
They use the study of relative dating etc...
Absolutely nothing.
to study dolphins
Scientists use mainly fossils.
whattools do scientist use to study meteors
Scientists use an electron accelerator :)
so scientists can detect smaller objects to study
a model of a ear
they use artifacts and fossils from the past
By the use of Seismograph.
rain gauge
GPS devises
houg
The fossil record