Mostly from the Sun, some from outside the Solar System.
Many millions burn up every day, several tens on miles up in our atmosphere.
Ones with sizes 50-100 m are possibly very dangerous . Resources page . The largest meteorite ever found on Earth weighs more than 66 tons, and was found 20 km west Grootfontein, Namibia, on a farm named Hoba-West. It crashed to earth tens of thousands of years ago.