Different types of orbits can, however, be used to accomplish different goals. The first artificial moon to be placed in low-Earth orbit was Sputnik 1 launched on October 4 th, 1957.

Planets and other celestial bodies can take many types of paths through space. Learn all about the different kinds of orbits in the sixth episode of "We Don't Planet." ...

Learn about different types of satellites—Communication, Earth Observation, Navigation, and Astronomical—and how each plays a crucial role in technology, observation, and exploration.

All known quasi-moons are temporary. Over hundreds or thousands of years, they transition to other types of orbits, like trojan or horseshoe orbits.

Asteroids floating through our solar system are debris left over from when our planetary neighborhood formed 4.6 billion ...

This diagram illustrates the differences between orbits of a typical near-Earth asteroid (blue) and a potentially hazardous asteroid, or PHA (orange). PHAs are a subset of the near-Earth asteroids ...

NASA is asking six companies to help the agency move spacecraft between difficult-to-reach orbits. The agency recently awarded a total of $1.4 million to the group, which includes companies like ...