Artist’s concept of the NTS-1, NTS-2 and NTS-3 satellites. NTS-3, right, is the U.S. military’s first Navigation Technology Satellite in 40 years. Credit: Lt. Jacob Lutz, AFRL Space Vehicles Directorate
The Air Force’s 45th Space Wing supported United Launch Alliance’s launch of the WGS-9 spacecraft aboard a Delta 4 rocket from Space Launch Complex 37 on March 18, 2017. Credit: ULA
Yutu- 2 Jan . 11, 2019 CLEP
SSL satellite servicing concept
SpaceIL lander
Opportunity rover
The Sentinel-2B satellite launched in March 2017 is part of Europe’s Copernicus system of Earth-observation satellites. Credit: Airbus
Boe Mann Ferguson
PTScientists lander
After much tinkering, Northrop Grumman Aerospace Systems has at last finished the cryogenic cooler that will keep JWST's Mid-Infrared Instrument at its frosty-cool operating temperature of minus 270 Celsius. Credit: NASA artist's concept
In its 2017 annual report, NASA's Jet Propulsion Laboratory published this chart showing its annual budget and spending on major programs. Credit: NASA
The Chang’e-4 lander imaged by the Yutu-2 rover on the lunar far side. Credit: CLEP/CNSA
An illustration of MethaneSAT, a small satellite designed to track methane emissions from human activities. The spacecraft's design is still under development. Credit: EDF
Hubble Space Telescope. Credit: NASA
Falcon 9 Crew Dragon LC-39A
Ground antenna at Schriever Air Force Base, home of the 50th Space Wing.  Credit: Air Force

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