NICER and SEXTANT demonstrate XNAV pulsar navigation system that may be used on Artemis.
NASA's New Horizons mission deep in the Kuiper Belt has measured the parallax to two nearby stars with the help of Earth-based observers.
Crewed spaceflight returns to U.S. soil, with the successful launch of Crew Dragon Demo 2.
Amateurs celebrate the venerable space telescope’s 30th anniversary with a look at some of its most mesmerizing images.
Persistent tremors on Mars suggest the planet’s interior is cooling and hint that there might be a pocket of magma beneath the surface.
NASA’s premier eye on the infrared sky is shutting down after operating more than three times longer than designed.
Concerns about the night sky remain as the fourth batch of Starlink satellites — and the second one to be launched within the span of a month — takes flight.
China’s Chang’e 4 mission has sent back fascinating insights and images in the year since its historic landing on the lunar farside.