What observation did this geocentric model of the solar system help to explain? orbit speed the phases of Venus retrograde motion the rising of the Sun

Using complete sentences, explain the differences between a command economy and a market economy. what type of economic system is created when these two systems are combined? what are the benefits of combining these two systems?

Why would the composition of a meteorite resemble the earth's interior?

Heyi am new to are you all americans? ( just want to know , i don't mean any offence ) ?