NASA has successfully tested a system that allows satellites to navigate without GPS by using other spacecraft and debris as landmarks in orbit. In just three days, FALCON also improved the known orbits of more than 200 space objects completely autonomously.

As researchers explain in a study recently published in the journal Acta Astronautica, these systems will all relate back to a route called the Near Rectilinear Halo Orbit (NRHO). The largely stable orbital path offers the most fuel efficient cosmic highway and an interrupted line of sight between spacecraft and mission specialists back home.

Negotiations between Senate and House Republicans over a bill to reauthorize the National Aeronautics and Space Administration have stalled as President Trump is scheduled to visit NASA’s Johnson Space Center in Houston Friday.

NASA astronaut Jonny Kim is leaving the space agency to continue his military career. Kim, who's also a medical doctor, completed one spaceflight during his NASA career.

Explore the tragic mission of Bonny the monkey, who was launched by NASA in 1969 for a 30-day experiment in space but faced dire consequences after just eight days, uncovering the ethical challenges of animal testing in aerospace research.

NASA's Nancy Grace Roman Space Telescope, set to launch this weekend, may shed new light on the nature of dark energy -- that mysterious force causing the universe to expand.

A private spacecraft failed to rescue NASA's Swift space telescope, leaving it to crash back to Earth in the near future. But details are sparse at the moment.

President Donald Trump was headed to Houston Thursday for a Republican fundraiser before a Friday ceremony honoring the Artemis II crew at Johnson Space Center.