Answer:
The Eastern Desert served as an important mineral resource for the ancient Egyptians. Limestone, sandstone, granite, amethyst, copper and gold were among the stones and metals mined from the desert, and the remnants of thousands of quarries, camps and roads are scattered through the region's mountains and wadis.
Answer:
Easier, about the same distance away, differences in apparent brightness are directly related to differences in intrinsic brightness of these stars
Explanation:
When Henrietta Leavitt discovered the period-luminosity relationship, she used Cepheid variable stars that were all located in the Large Magellanic Cloud (LMC). It was easier to compare Cepheids in the LMC rather than those located in the Milky Way Galaxy because they are all about the same distance away. As a result differences in apparent brightness are directly related to differences in intrinsic brightness of these stars.