Irene Klotz

Will the first astronaut on Mars work for SpaceX or NASA — or both?

The ExoMars life-scouting rover mission to Mars will stay on the ground an extra two years.

Titan — the only other body in the solar system besides Earth where liquids pool on the surface —has a sea of pure methane.

In his final DNews segment, President Obama will highlight Henrietta Swan Leavitt, whose insights helped devise a cosmic yardstick for measuring the universe.

SpaceX's successful return of the first stage booster of its Falcon 9 rocket to an ocean platform has the potential to revolutionize our access to space. But how?

A correlation is found between when methane plumes appear on Mars and when the planet passes through remnants of a comet.

For the first time, Jeff Bezos, billionaire and chief executive of Amazon, opened the door to his secretive rocket factory Blue Origin — here's an exclusive look inside.

Before its planned crash into Mercury last year, NASA’s MESSENGER spacecraft gave scientists a parting gift.

The grounded Mars lander was supposed to have launched by now -- will it be re-scheduled for 2018? NASA is mulling it over.

Now the elusive ripples in spacetime have been found, scientists are planning for a rich future for using gravitational wave observatories to unmask the warped side of cosmos.

Gravity measurements taken by the orbiting Rosetta spacecraft show the body of comet 67 P/Churyumov-Gerasimenko is about 75 percent dust and 25 percent ice all the way through.

After losing a bid to SpaceX and Boeing to taxi astronauts to the International Space Station, Sierra Nevada’s miniature space shuttle Dream Chaser will have a new mission — flying cargo for NASA.

Among real space explorers, few songs have resonated as powerfully as David Bowie’s iconic 'Space Oddity.'

The odds aren’t great. Engineers don’t even know if Philae still has a working receiver and the probe could be covered in dust.

An ancient supernova that was serendipitously captured in four Hubble space telescope images thanks to a naturally occurring cosmic magnifying lens has reappeared, as astronomers predicted.

Astronomers wanting more accurate measurements of distant black holes have some new assistants — robots that can tackle the tedious task of monitoring black hole neighbor clouds’ glow.

A windy day on HD 189733b is nothing to take lightly.

Chemical analysis by NASA’s Mars rover Curiosity indicates that water made several repeat appearances to create the rich mineral veins at a site called “Garden City” in the lower part of Mount Sharp.

A new test for defining the planetary status of an exoplanet has been formulated, but a certain dwarf planet in our solar system still doesn't make the planetary grade.

A pressure chamber used to simulate harsh environments, such as what exists on Venus, Saturn's moon Titan and the giant planets, is open for business at NASA's Glenn Research Center.

A Japanese cargo ship that arrived on Monday at the space station delivered an astrophysics telescope that will join the flagship Alpha Magnetic Spectrometer in hunting for cosmic rays.

After a 7-month hiatus, the revived European comet lander is nearly ready to resume work, expanding on our scientific understanding of the solar system.