Marcia Dunn

AP Aerospace Writer

Model 9061 Ultrasonic Leak Detector

Model 9061 Ultrasonic Leak Detector

The Model 9061 Ultrasonic Leak Detector (ULD) is a hand-held, high quality instrument that can locate costly leaks in a compressed air system.

Composite image of the surface of Mars as captured by the Perseverance Mars rover.

NASA Releases Mars Landing Video: 'Stuff of Our Dreams'

The footage was so good that members of the rover team said they felt like they were riding along.

Hayley Arceneaux at St. Jude Children’s Research Hospital, Memphis, Feb. 10, 2021.

Cancer Survivor to Join Billionaire on SpaceX Flight

Hayley Arceneaux will become the youngest American in space.

The Perseverance rover lowered towards the surface of Mars during its powered descent, Feb. 18, 2021.

Mars Team 'Awestruck' by Descending Rover Photo

The mission's chief engineer called the picture "iconic."

Northup Grumman's Antares rocket lifts off from NASA's Wallops Island facility, Wallops Island, Va., Feb. 20, 2021.

Launch Honors 'Hidden Figures' Mathematician

Northrop Grumman's Cygnus capsule — dubbed the S.S. Katherine Johnson — should reach the International Space Station on Monday.

Members of NASA's Perseverance rover team react in mission control after receiving confirmation the spacecraft successfully touched down on Mars, Feb. 18, 2021, NASA's Jet Propulsion Laboratory, Pasadena, Calif.

NASA Rover Lands on Mars to Look for Signs of Ancient Life

Perseverance, the biggest, most advanced rover ever sent by NASA, became the ninth spacecraft to successfully land on Mars.

In this illustration provided by NASA, the Perseverance rover fires up its descent stage engines as it nears the Martian surface.

NASA Rover Attempting Most Difficult Martian Touchdown Yet

Perseverance is headed for a compact patch filled with cliffs, pits, sand dunes and fields of rocks.

Sarah Amiri, deputy project manager of a planned United Arab Emirates Mars mission, during a ceremony in Dubai, May 6, 2015.

Next Stop Mars: 3 Spacecraft Arriving in Quick Succession

The stakes — and anxiety — are sky high.

SpaceX's Starship prototype explodes while attempting to land, Feb. 2, 2021, Boca Chica, Texas.

SpaceX's Starship Test Ends with Another Fiery Blast

The prototype rocket was unable to straighten itself and slammed into the ground.

Astronauts Mike Hopkins, left, and Victor Glover work outside the International Space Station, Feb. 1, 2021.

Spacewalkers Complete 4 Years of Power Upgrades

A robot arm replaced the last pair of old batteries with a single, better-quality one.

In this image taken from video, NASA astronaut Victor Glover makes his way to the International Space Station’s European lab, Jan. 27, 2021.

Cable Trouble Dogs Space Station Lab Upgrades

Engineers will try to come up with a work-around for a future spacewalk.

The InSight lander, Dec. 6, 2018.

Mars Digger Bites the Dust After 2 Years

Scientists declared the probe dead after it couldn’t gain enough friction in the Martian dirt.