Space & Physics

A long-simmering disagreement over the universe’s present-day expansion rate shows no signs of resolution, leaving experts increasingly vexed

The privately funded Fram2 mission is the first ever to take astronauts into polar orbit—and the latest sign of a “new normal” for human spaceflight

Fram2, a first-of-its-kind private mission to send four astronauts into polar orbit around Earth, is about to launch

Swarms of satellites launched by SpaceX and other companies are disrupting astronomical observations. Here's how scientists are coping

In a first, physicists have directly seen Hofstadter’s butterfly—a long-sought-after fractal in the quantum realm

Evidence of alien worlds goes back farther than you think

The threat from near-Earth asteroid 2024 YR4 may have subsided, but discoveries of other hazardous space rocks are set to soar as new observatories come online

The European physics laboratory CERN is planning to build a mega collider by 2070. Critics say the plan could lead to ruin

Scientists in China have transmitted encrypted images a record 12,900 kilometers, paving the way for quantum messaging anywhere on Earth

“Qudits,” the multi-dimensional cousins of qubits, could make quantum computers more efficient and less prone to error

Supersymmetry, long considered the golden child of theoretical physics, has officially lost its luster at the world’s reigning particle accelerator

Have you seen something inexplicable in the sky? Jon Kosloski, director of the U.S. Department of Defense’s All-Domain Anomaly Resolution Office, wants to hear from you