Venus—a hot planet pocked with tens of thousands of volcanoes—may be even more geologically active near its surface than ...

Although Mars and ice-covered oceanic moons draw the most attention ... frameworks to explore the unknowns and uncertainties ...

What drives us to send probes throughout the solar system and rovers and landers to Mars? It's not cheap, and it's not easy.

Our planet's closest and brightest neighbor will pass approximately between the Earth and sun this week, in what's called an ...

Some lucky stargazers could have a double feature of the planet Venus this weekend. On Saturday and Sunday, the Earth will have an inferior conjunction (closest approach) with Venus, the sixth ...