What is Extragalactic planet?
An '''extragalactic planet''', known as an '''extragalactic exoplanet''' or an '''extroplanet''',<ref>{{Cite web|last=Smith|first=Kiona|title=Extroplanet: Astronomers may have just found the first planet outside our galaxy|url=https://www.inverse.com/science/first-planet-outside-our-galaxy|access-date=2022-11-14|website=Inverse|language=en}}</ref><ref>{{Citation|title=M51 ULS 1b - M51 Whirlpool Galaxy Extragalactic Planet Candidate|url=https://www.youtube.com/watch?v=pXn5RYUmX9s|language=en|access-date=2022-11-14}}</ref><ref>{{Cite web|last=Ramesh|first=Sandhya|date=2021-10-29|title=NASA telescope may have just helped find the first planet spotted outside Milky Way|url=https://theprint.in/science/nasa-telescope-may-have-just-helped-find-the-first-planet-spotted-outside-milky-way/758166/|access-date=2022-11-14|website=ThePrint|language=en-US}}</ref> is a [[star]]-bound [[planet]] or [[rogue planet]] located outside of the [[Milky Way|Milky Way Galaxy]]. Due to the very far distances to such worlds, they would be very hard to detect instantly. However, indirect evidence suggests that such far planets exist.<ref>{{Cite journal|last1=Dai|first1=Xinyu|last2=Guerras|first2=Eduardo|date=2018-01-31|title=Probing Planets in Extragalactic Galaxies Using Quasar Microlensing|doi=10.3847/2041-8213/aaa5fb|arxiv=1802.00049 |s2cid=119078402 }}</ref><ref>{{Cite web|title=Latest Stories from National Geographic|url=https://www.nationalgeographic.com/pages/topic/latest-stories|access-date=2022-11-14|website=National Geographic|language=en}}</ref><ref>{{Cite web|date=2018-02-05|title=Scientists Find Evidence of Thousands of Planets in Distant Galaxy|url=https://gizmodo.com/scientists-find-evidence-of-thousands-of-planets-in-dis-1822727151|access-date=2022-11-14|website=Gizmodo|language=en}}</ref> Nonetheless, the most distant planets known are [[SWEEPS-11]] and [[SWEEPS-04]], these two stars are located in [[Sagittarius (constellation)|Sagittarius]] with a distance of approximately 27,710 [[Light year|light years]] from the [[Sun]],