Space
Data from the second probe to reach interstellar space helps scientists form a more complete picture of the boundary between the sun and the stars.
Quiver at the sight of skeletal galaxies, stellar pumpkins and ghostly interstellar visitors.
Researchers find plausible, alien-free explanation for observations of star KIC 8462852.
Enjoy the start of astronomical autumn with black holes, a comet, star clusters and other stunning images.
Explore the applications of state-of-the-art clocks -- and the math that describes their performance and limitations.
Planet K2-18b is about twice as wide as Earth and located about 110 light-years away.
Bacteria in one of the most extreme places on Earth point toward past life on Mars.
A month's worth of cool science stories summed up.
Appreciate anniversaries marked by moonwalks and stellar fireworks this month
Pressurized water may cause quakes on Mars the same way fracking and wastewater injection trigger quakes on Earth.