What is the primary mission of the orbital debris observatory? a. it is used as part of our national security to listen in on communication. b. it is used to make three-dimensional models of the galaxies. c. it locates spy satellites and decodes secret military languages. d. it locates old satellites, lost equipment, and space-related garbage.

the correct answer is d. It locates old satellites, lost equipment, and space-related garbage.

Explanation: Debris can be dangerous for satellites or spacecraft that's why   more than 500,000 pieces of debris, or “space junk,” are tracked as they orbit the Earth. They all travel at speeds up to 17,500 mph.

one of the negative side effects were the economic losses the events of september 11th caused. many, many people lost their jobs as a result of a downturn in the economy after the terrorist attacks.

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.