All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

windblown landscape that could—just maybe—harbor microbial life beneath its rusty surface even today. With a radius of 2,106 miles, Mars is the seventh largest planet in our solar system and ...

"This is the most powerful volcanic event ever recorded on the most volcanic world in our solar system — so that's really ...

If you need more solar projects for your garden, how about this Charmander lamp or a solar powered irrigation system?

The organic ingredients to life, hints to where Earth’s water came from, and the fundamental building blocks of our planet ...

Scientists are proposing ways to explore Venus in the next decade and beyond by way of a host of advanced technologies, from balloons to long-lived landers.

There may be an undiscovered planet in the outer solar system whose presence is revealed by the strange orbit of objects beyond the eighth planet Neptune. The tantalizing prospect of a ninth ...