This would help explain the perturbations in the orbits of Uranus and Neptune. Many suggestions have been made, but none verified as yet. Included among the possibilities are a new planet, a dark stellar companion, and even a black hole. A globular cluster may contain over 10,000 stars across only 100 light-years. That means that the Milky Way and Andromeda are rushing towards each other.
Quasars are the most distant objects in the known universe.
If you could fly across our Galaxy from one side to the other at light speed, it would take 100,000 years to make the trip. The first telescope was put to practical use in 1609 by Galileo. It was a simple refractor. The telescope gathers 640,000 times as much light as the human eye. Simple dobsonian telescopes are cheap, practical telescopes for beginner and intermediate observers.