Who was a muslim traveler and writer who visited africa, india, china and spain, who also has a crater on the moon named in his honor?

Ibn Battuta. He was a medieval Moroccan Muslim Scholar and traveler and has a crater on the moon. He is known as the worlds greatest traveler.

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.