Astronomers estimate that 50 billion to one trillion galaxies exist within our universe.
true or false

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.

According to some historians which marks at the beginning of the us civil war

What are the major problems with a command economy?