Using the James Webb Space Telescope, astronomers have mapped the "cosmic web" of galaxies, the largest structure in the ...

As the four astronauts on the 10-day Artemis II mission around the moon got their first clear glimpse of Earth, the view of their home planet in the distance stopped them in their tracks. They ...

Our universe appears flat—but this observation still leaves plenty of options for its true shape. In fact, our cosmos could ...