New moons are the cardinal phase of the monthly lunar cycle, and they occur when the sun and moon meet at the same point in ...

There are currently no other explanations for the effects that we see, nor for the myriad other P9-induced effects we see on ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Early observations of the planets revealed worlds far different from Earth, demonstrating that the universe was far more ...

Pluto reaches opposition and is ready for those who want to chase it down. Use the biggest scope you've got, or take aim with ...

Pluto reaches opposition and the Moon waxes to First Quarter as shooting stars streak through the sky this week.