Mars

Astrophysicist Neil deGrasse Tyson helped DC Comics choose the planet, which is 27.1 light-years from Earth

Living organisms produce more than 90 percent of the methane found in Earth's atmosphere, so scientists are keen to see if the gas is present in Mars's air. The hunt continues

Scientific American asks leaders of a dozen House and Senate committees for written answers to eight policy questions related to science and technology

Curiosity's analysis of soil from the Gale Crater is consistent with a time of transition from a wet to a dry environment

Clouds are important in understanding how the atmosphere behaves. They reflect sunlight back into space, trap heat and carry moisture, all of which can have contradictory impacts

The $2.5-billion robot has performed its first contact-science operations

A look at the newly discovered Kepler 47 exoplanetary system and the mathematical models that describe it

Similarities in the upper atmospheres of the three planets may be due to meteoroids' shedding heavy elements as they pass through

NASA's next low-budget planetary mission will land a probe on Mars in 2016 to investigate the Red Planet's inner workings

After engineers run a months-long setup of the Mars Science Laboratory, now parked in a crater, scientists will take the rover on a nearly two-year journey that includes a visit to a six-kilometer-high mountain

The elaborate landing of the $2.5-billion mission went off without apparent incident

The six-wheeled robot is carrying 10 science instruments—and a wealth of high-tech camera gear