These alien geysers spew life’s building blocks

The Cassini mission to Saturn is over, but scientists still pore over its data. The newest discovery is of organic compounds - the ingredients of amino acids, the building blocks of life - in water vapor plumes from Saturn's moon Enceladus.

Curiosity finds an ancient oasis on Mars

Scientists working with the Curiosity rover have found salt-enriched rock at a place called Sutton Island on Mars. The rocks suggest ponds with briny water on Mars, billions of years ago.

Saturn is our solar system’s new moon king

Astronomers have found 20 new moons orbiting Saturn, bringing the planet's total number of moons to 82. That surpasses Jupiter, which has 79.

‘Impossible’ exoplanet and an alternate planet-formation theory

The discovery of exoplanet GJ 3512b - a planet "too big for its star" - adds fuel to the competition between 2 theoretical models of how planets form. It suggests many more Jupiter-like planets are waiting to be found, orbiting nearby sunlike stars.

Scientists start mapping universe’s hidden web

Maps of the long filaments of gas that hold the universe together might one day help trace and unveil dark matter.

Not long ago, the center of our Milky Way galaxy exploded

Researchers have found evidence of a cataclysmic flare that punched outward in both directions from our galaxy's center, reaching so far into intergalactic space that its impact was felt 200,000 light-years away.

The violent history of Andromeda, the big galaxy next door

"The Milky Way is on a collision course with Andromeda in about 4 billion years. So knowing what kind of a monster our galaxy is up against is useful in finding out the Milky Way's ultimate fate."

Cosmic web fuels stars and supermassive black holes

Astronomers probed the cosmic web, a large-scale structure composed of massive filaments of galaxies separated by giant voids. They found the filaments also contained significant amounts of gas, believed to help fuel the galaxies' growth.

Juno prepares to jump Jupiter’s shadow

NASA's Juno mission to Jupiter has now successfully executed a 10.5-hour propulsive maneuver. It'll keep Juno - a solar-powered spacecraft - out of a mission-ending shadow due to have been cast by Jupiter onto the craft in November.

Listen to the sounds of Mars

Here are some of the noises picked up by NASA’s Insight spacecraft since it landed on Mars almost a year ago.

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