Stories by Elizabeth Howell

For the third time in a year, coolant is leaking from a Russian module aboard the International Space Station

Luna-25, Russia's first moon mission in nearly a half-century, was the vanguard of a planned series of lunar probes

The Space Launch System rocket could lift off on its voyage to lunar orbit as early as late August

Space agency officials promise to deliver geology results from worlds dozens of light-years away

Three decades after it began, the exoplanet revolution shows no sign of slowing down

With its mirrors now focused, the observatory’s science instruments are now being readied for work

The eminent astrophysicist changed the way we view our home star

The observatory must complete about 50 major deployments after liftoff

The new image shows the comet emerged intact from its perilous passage through the inner solar system

Although still a long way from becoming law, the legislation is reigniting a debate over the space agency’s plans

Future batches of the satellite will have a special coating to reduce their reflectivity

Watch while you can—the next transit of the closest planet to the sun will not occur until 2032

Hundreds of previously overlooked Earth-sized planets may await discovery in archives from NASA’s Kepler mission

New evidence from the asteroid belt and other sources hints at a surprisingly complicated creation story for the giant planet

 The tumbling spacecraft’s uncontrolled reentry could resemble that of NASA’s Skylab station from 1979

The finding raises new questions about the nature of these colossal cosmic explosions

Images from the Rosetta spacecraft provide the first clear link between a comet's outbursts and changes upon the comet's surface

The Swift telescope has charted a star's plunge into a supermassive black hole at the core of a distant galaxy

The station's Cold Atom Laboratory will reach temperatures just a billionth of a degree above absolute zero

An international group of astronomers is set to codify a crop of informal names for the dwarf planet's geographical features

African-American women working behind the scenes as “human computers” were vital to the Space Race

The phenomenon, called a gravity wave, is likely produced by winds flowing over a mountain on the planet's surface

Signs seen on brown dwarf, an object bigger than a planet and smaller than a star

NASA’s interplanetary probe is cruising toward an encounter with our local gas giant this summer. As the data starts flowing in, we may also learn about Jupiter’s many cousins across the galaxy