The self-professed “Pluto Killer” is at it again. Dr. Michael Brown is now reminiscing about the good old days when…
Sometimes when you stare at something long enough, you begin to see things. This is not the case with optical…
What's a comet that doesn't look like a comet? The question sounds contradictory, but astronomers believe these objects exist. As…
Two icy asteroids could have crashed into each other early in the solar system's history to form the strange-looking 624…
Less than a year from now, the New Horizons spacecraft will begin its encounter with Pluto. While closest approach is…
Emily Lakdawalla is the senior editor and planetary evangelist for the Planetary Society. She's also one of the most knowledgeable…
Over 4 billion miles (6.7 billion km) from the Sun, the Kuiper Belt is a vast zone of frozen worlds…
[/caption] Saturn's curious moon Phoebe features a heavily-cratered shape and orbits the ringed planet backwards at a considerable distance of…
[/caption] Planetary scientists have not been able to agree that a turbulent period in our solar system’s history called the…
[/caption] The idea isn’t new that Earth’s oceans originated from comets bombarding our planet back in its early days. But…