There are meteors raining down on Earth all the time. Most are particles/’dust’ from comets the size of a grain of sand. Ones that create fireballs like you saw are likely initially the size of a boulder. They travel so fast (thousands of miles per hour) that they ionize atoms in the atmosphere producing the light we see. Galaxies, btw, are millions of light-years away. One light-year, the *distance* light travels in a year at 186,000 per second (light speed), is nearly 6 TRILLION miles. Those ‘colliding galaxies’ in the news recently that you mention are probably hundreds of millions of light-years away.
Sometimes too, large wheels of cheese, like a nice stout Edam or an improbably-gooey Camembert.
Monroeville, a suburb of Pittsburgh, was destroyed in 1987 by the impact of a massive roll of intergalactic provolone. No. It's true.