Space & Physics

Scientists studying a centuries-old mystery of physics suggest two “arrows of time” control the evolution of quantum systems

Several companies have contracts with NASA to design private space habitats to replace the International Space Station once it’s gone

We look back on about 11 years of the Gaia spacecraft, now at the end of its mission to create the best map of the Milky Way.

With radio and infrared telescopes, astronomers can pierce the dusty veil of our galaxy and map its farthest reaches

With its ‘topological’ quantum computers, Microsoft aims to reach useful scales faster than competing technologies

Asteroid 2024 YR4’s risk of hitting Earth is shifting with new data, astronomers say

Space scientists within NASA and outside it feel betrayed by the Trump administration’s changes at the agency, which was known for promoting inclusion in science

Proposed U.S. space defenses against hypersonic nuclear missiles are unnecessary, impractical and would trigger a dangerous new arms race

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy

People are surprisingly bad at guessing knot strength, a study found

New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change

Physicists are finding new ways to model false vacuum decay, a terrifying, albeit remote, cosmic endgame