  Motivated by ongoing discoveries of features (most likely) attributable to
exocomets in various systems, this study examines the dynamics of possible
comets around 47 UMa. Based on the assumption that most systems hosting planets
should also harbor leftovers from planet formation processes, comets are thus
also expected to exist in the system of 47 UMa. This system is known to host
three Jupiter-type planets; however, based on stability analyses, additional
terrestrial planets in stable orbits might also be able to exist, including
planets in 47 UMa's habitable zone. Furthermore, we also consider a possible
'Hilda'-planet. The aim of our study is to explore the interaction of exocomets
with the Jupiter-type planets in the system and examine the probability of
cometary collisions with the planets, including possible Earth-mass planets
located in the habitable zone. Moreover, we investigate the transport of water
onto the Earth-mass planets, including quantitative estimates. It is found that
the Earth-mass planets would be able to receive some water, but much less than
currently present on Earth. We also checked if the comets form families, but no
families were found. Finally, the capture of comets in close orbits and the
possibility of small clouds formed when comets come too close to the star and
disintegrate are also part of our work.
