Airliners leave cirrus clouds in their wakes, and if these contrails could be reduced or eliminated, their climate warming contribution could instantly be erased from the climate change equation. Read it
by Keith Button
Light launchers under development with the support of venture capitalists and NASA could transform how cubesats and other small satellites reach space.
by Marc Selinger
ANALYSIS: SPACE COLLABORATION AT RISK
International cooperation was all the rage after the fall of the Soviet Union and establishment of the International Space Station program in the 1990s. But that consensus is lacking today regarding the future of human space flights. Read it
by Anatoly Zak
KEEPING TIME IN DEEP SPACE
NASA plans to launch an atomic clock for better navigation in space.
by Debra Werner