Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may ...

The US wants to put a flag on Mars. But there’s a risk it could carry unwanted stowaways that might compromise future ...

Five of the brightest planets Mercury, Venus, Mars, Jupiter, and Saturn, can be seen even from urban areas with mild ...

Moments in human history are etched into the Earth. Now researchers are piecing together evidence of our impact on the planet ...

ESA's Solar Orbiter captured views of the planet Mercury passing in front of the Sun. Multiple instruments aboard the ...