Mars

Will the bill giving everyday Americans the opportunity to invest in clean energy pass in Congress?

Golden Spike, helmed by former NASA officials, wants to return human explorers to the lunar surface--for a price

The new rover may collect Martian soil samples to bring back to Earth for further analysis

This week offers skywatchers an opportunity to catch a rare glimpse of Mercury and to spot Jupiter at its biggest and brightest

SpaceX founder Elon Musk wants to colonize the Red Planet, flying pioneers into space for $500,000

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