Some orbits are ever so slightly elliptical (like a somewhat ... They emerge from the farthest reaches of the solar system, way beyond the orbit of Neptune, then zip past the sun before ...

Is Earth really exceptional?  A new book seems to reaffirm that notion.  But given the right conditions, primitive life may be a mere byproduct of biophysics.

Earth, HD 20794 d, orbiting a nearby sun-like star, offering a promising lead in the search for life beyond our planet.

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

India has launched satellites for its satellite navigation system into space. The second failed to reach its intended orbit ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's responsible for the orbits of the planets and their satellites, but there ...

A recently launched satellite is stuck in space after failing to fire its thrusters, preventing it from reaching its operational orbit.

The acid yellow moon Io that orbits Jupiter may be less than 30% the size of Earth, but is considered the most volcanic body ...