Final answer:
You can use physical objects like pushpins or stickers for paper maps and digital markers in mapping software for virtual maps. Astronomers utilize coordinate systems akin to latitude and longitude to locate celestial bodies and understand their apparent motion as observed from Earth.
Step-by-step explanation:
The kind of object you can use to add one or more markers to a map varies depending on the type of map. For physical maps, one might use simple pushpins, stickers, or flags to indicate locations of interest. In digital mapmaking or Geographic Information Systems (GIS), software tools allow for the addition of virtual markers or pins to represent cities, landmarks, or other points of interest.
These can often be customized with different icons, colors, or labels to convey different types of information. When it comes to celestial mapmaking, astronomers use a system similar to latitude and longitude to pinpoint the exact location of stars, galaxies, and other celestial objects. Understanding the systems used for marking Earth maps and astronomical objects is essential for comprehending the apparent motion of objects in the sky from various places on Earth.