What were the two most important instruments the prince henry used in his navigational school

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

The low and midlevel clouds that look like cotton balls are

What were copernicus’s ideas about the order of the universe deemed to be dangerous to church thinking? (5 points) a. the church was invested in the idea that the earth was at the center of the universe b. copernicus was developing a new religion that would challenge the church c. the church feared his ideas threatened their control of european universities d. copernicus was a follower of luther and therefore could not be trusted