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Ever since the space shuttle retired in 2011, NASA has been paying Russia for rides to the International Space Station. They’d hoped that dependency would finally end in 2019. But with its new lineup of flights and launch dates released this we...

SpaceX’s Crew Dragon capsule experienced an “anomaly” during a rocket test on Saturday that sent smoke drifting high over its launchpad at the Kennedy Space Center in Florida. Elon Musk and SpaceX have been short on details so far, ...

Friday, April 19 Full Moon arrived at 7:12 a.m. EDT this morning, but it still looks completely illuminated tonight. It rises in the east about a half-hour after sunset and climbs well above the southeastern horizon by late evening. The Moon spends t...

Chandra observations show the flare-up and subsequent dimming of XT2, which matches predictions for the signal from a pair of merging neutron stars and the birth of a magnetar. X-ray: NASA/CXC/Uni. of Science and Technology of China/Y. Xue et al; O...

On August 13, 2017, the Next Generation Transit Survey (NGTS) telescope spotted an intense solar flare from a tiny star barely bigger than Jupiter. But despite this star’s diminutive size, the flare gave off as much energy as 80 billion megaton...

If you enjoy watching videos on the internet, you've likely already witnessed the phenomenon known as supercooling. Basically, the process involves taking ultra-pure water and putting it into a clean, smooth container that lacks any structural defect...

Stars in the night sky appear as tiny points of light because they are too far away for your eyes to resolve. But even through powerful telescopes, stars still appear as mere points because they are too small to see their true physical size at vast d...

Everything has a beginning. That’s true for stories, for people, for the universe and even for chemistry. The Big Bang itself produced just a handful of elements (variations of hydrogen, helium and lithium nuclei), so researchers have a pretty ...

Our solar system is a whopping 4.5 billion years old. And those earliest days were some of the most interesting for astronomers. That’s when the planets formed, building from dust grains into the whole worlds that now populate our space neighbo...

Before NASA’s Cassini spacecraft plunged into Saturn’s depths, it performed a final 2017 flyby of Titan, Saturn’s largest moon. This remote world is the only place in the solar system other than Earth that hosts large bodies of stan...

Like the planet Tatooine from Star Wars, two suns — one bright, one dim and red— rise over the horizon of Kepler 47d. But unlike dry and sandy Tatooine, this planet’s surface is gassy and indistinct. The system also holds two smalle...

The idea to launch billboards into space may have seemed like just another marketing gimmick. In January, Astronomy reported on a Russian start-up company called StartRocket that said it wanted to use swarms of mini satellites called CubeSats to proj...

The next generation of exoplanet hunting has arrived in the form of NASA’s Transiting Exoplanet and Survey Satellite. TESS looks at closer and brighter stars than Kepler, the spacecraft that first turned the trickle of exoplanet discoveries int...

When NASA astronauts first landed on the Moon in 1969, they saw a desiccated world, bone-dry and devoid of any life-giving water. The Apollo astronauts, planning to stay only a few days, had brought plenty of water for their own needs. So this findin...

Friday, April 12 First Quarter Moon arrives at 3:06 p.m. EDT. You can find the half-lit orb high in the southwest as darkness falls; it doesn’t set until nearly 3 a.m. local daylight time tomorrow morning. The Moon currently lies on the border ...

Israel’s Beresheet spacecraft, which was set to land on the Moon yesterday, suffered an engine and communications failure, causing it to crash into the lunar surface. Details are still emerging about what exactly went wrong. SpaceIL and the Is...

After a successful launch that delivered the Arabsat-6A satellite into its planned orbit, SpaceX also succeeded in landing all three of the boosters for their Falcon Heavy rocket — a first for the private space company. On a previous test fligh...

Brothers compete. So in 2016, when astronaut Scott Kelly returned to Earth after spending a year in space, it must have really annoyed his identical twin brother — retired astronaut Mark Kelly — that Scott was two inches taller than when ...

Space travel, you may have heard, is hard. Hard on the brain, to design ways to slip the surly bonds of Earth in the first place, but also hard on the body, which needs to withstand conditions it was never designed for. If NASA’s serious about ...

Update: Israel's Beresheet lander has crashed into the moon after suffering an engine and communications failure. After a nearly seven-week adventure since its launch, the Israeli Beresheet spacecraft will attempt make history today and touch down o...

Israel’s Beresheet spacecraft, which was set to land on the Moon today, suffered an engine and communications failure, causing it to instead crash into the lunar surface. Details are still emerging about what exactly went wrong. Within the last...

SpaceX’s Falcon Heavy launch was delayed again yesterday, this time due to high winds. SpaceX CEO Elon Musk said back on April 5 that because this is the first launch of Falcon Heavy’s Block 5, the latest and most powerful version of its ...

Trying to take a picture of a black hole — an object that is, by definition, invisible—sounds like an exercise in futility. But for decades, theoreticians suspected it may just be possible to get a detailed view of a black hole’s pe...

A massive international collaboration of researchers has released the first-ever direct image of the hellish environment surrounding a supermassive black hole. As part of the Event Horizon Telescope (EHT) project, the team used a global array of tele...

A black hole isn't an easy thing to photograph. The famously inscrutable objects are so dense that even light can’t escape their vicinity. By definition, they are invisible. So when the Event Horizon Telescope team released the first image of a...

Editor’s Note: This story has been updated from a previous version. SpaceX’s Falcon Heavy will likely launch on its first commercial flight today. The rocket launch was postponed from early April due to unspecified concerns, and then pos...

The European Space Agency’s ExoMars spacecraft failed to find any traces of methane on the Red Planet during its hunt from April to August of 2018. This goes directly against recent positive reports of methane by ESA’s own Mars Express sp...

On Wednesday, astronomers revealed the first image ever taken of a black hole, bringing a dramatic conclusion to a decades-long effort. The iconic image offers humanity its first glimpse at the gas and debris that swirl around its event horizon, the ...

SpaceX’s Falcon Heavy will launch on its first commercial flight tomorrow. The rocket launch was postponed from early April due to unspecified concerns, and then postponed again just this week due to weather. But Wednesday has a clear forecast ...