Astronauts Steven Smith and John Grunsfeld, appear as small figures in this wide-angle photograph from December 1999, taken ...

For the past decade, scientists have been trying to get to the bottom of what seemed like a major inconsistency in the ...

The Webb telescope detects a clear, hydrogen-rich atmosphere, as well as water vapor, on the hot sub-Neptune planet TOI-421 B ...

James Webb telescope helped solve a decade-long mystery about the universe’s expansion rate, shedding new light on the cosmic ...

Scientists have long puzzled over a discrepancy in how fast the universe is expanding, but new, sharper data from the James ...

The second half of the 19th century was a particularly interesting time to imagine Mars. This was a period during which the ...

Stargazing begins by simply looking up, but these gadgets go a long way in unlocking the mysteries of the night sky. Get more ...

Every 44 minutes, a mysterious space object nearly 15,000 light-years away sends out a blast of radio waves and high-energy X ...

Across the cosmos, many stars can be found in pairs, gracefully circling one another. Yet one of the most dramatic pairings ...

The James Webb Space Telescope has revealed a hidden population of supermassive black holes in the early Universe. These ...