Which nebula is not a nebula? What meteorite is not a meteorite? What else do you know about these objects?

The Andromeda Nebula is the closest large galaxy to us; on a dark night, it is visible to the naked eye as a hazy speck in the constellation Andromeda. The Tunguska meteorite fell in the Siberian taiga on June 30, 1908. Its fragments have never been found, so scientists believe that it was not a meteorite, but an icy comet nucleus.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.