Earth, between sweltering Venus and frozen Mars, formed and orbits within a band where water could persist in solid, liquid, and gaseous phases. Mars had surface water, but not as much as Earth, and ...

The dream of traversing the depths of space and planting the seed of human civilization on another planet has existed for generations.

The movements of the planets in the Solar System are pretty difficult to get your head around, even before we get started on ...

ANSWER: Very big!! The Milky Way Galaxy is one of billions of galaxies in the known universe. The Milky Way is a spiral ...

New research sheds light on how a pair of unusual black holes may have been able to keep their companion stars alive — and at a distance.

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One ...

While that sounds like a huge distance, it is actually very close on a solar system scale: The closest planet to the ...

A new study posits that our planet's gravity will cause seismic activity on Apophis when it makes its close approach in 2029.

Choosing the right iPhone often comes down to finding the perfect size for your needs. With Apple offering a range of models, from compact designs to the biggest iPhone on the market, knowing the ...

A century ago this month, a brash astronomer leaked a discovery that opened our view to the cosmic distance scale and the ...

The imprecision in the measurements of claimed interstellar fireballs means it is highly likely they originate in the solar ...

Union of Concerned Scientists. "Environmental Impacts of Solar Power." National Renewable Energy Laboratory. "Land Use by System Technology." Massachusetts Institute of Technology. "Shining Brightly." ...