Scientists argue that two Saturnian moons, Titan and Hyperion, are not primordial worlds, but the result of a dramatic merger between two ancient moons.
astronomers identified the clearest observational record yet of a massive star fading and vanishing into a black hole — an event once theorized but rarely seen.
The researchers found that additional studies of the data from Curiosity show that non-biological sources they had considered don’t fully explain the organics. They conclude, therefore, that a biological source is a reasonable hypothesis.
The comet is blasting out water at a rate of about 40 kilograms per second while still far from the Sun—much farther than where most comets “switch on.”
The chemical math of the interior of the meteorite Black Beauty means that those little bits of rock hold up to about 11% of the sample's total water content.
Researchers have identified the largest sulfur-bearing molecule ever found in space: 2,5-cyclohexadiene-1-thione (C6H6S).
A mysterious bar-shaped cloud of iron has been discovered inside the iconic Ring Nebula.
Scientists on Wednesday sealed ancient chunks of glacial ice in a first-of-its-kind sanctuary in Antarctica in the hope of preserving these fast-disappearing records of Earth's past climate for centuries to come.
A nearby active galaxy called VV 340a offers a dramatic look at how a supermassive black hole can reshape its entire host.
The unusual cosmic lump — dubbed 2025 MN45, 2,300 feet in diameter and located in the Main Asteroid Belt between the orbits of Mars and Jupiter — completes a full rotation every minute and 53 seconds.
Astronomers observed changes in the star’s spectrum and these changes are the direct result of the companion star, Siwarha, plowing through Betelgeuse’s outer atmosphere.
A team of astronomers discovered an extremely hot galaxy cluster that’s far hotter and older than current theories allow.
An object spotted in deep space is the strongest candidate yet for a galaxy arrested during early development.
Astronomers tracking a nearby star system thought they had spotted an exoplanet reflecting light from its star. Then it vanished. Even stranger, another bright object appeared nearby.
A newly discovered exoplanet is rewriting the rules of what planets can be. Orbiting a city-sized neutron star, this Jupiter-mass world has a bizarre carbon-rich atmosphere filled with soot clouds and possibly diamonds at its core.
