Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

NASA said the system is thought to be moving at least 1.2 million miler per hour, nearly twice as fast as our solar system.

On this day 35 years ago, NASA's Voyager 1 spacecraft took a picture that changed how we see our planet. The iconic "Pale ...

Astronomers have discovered what seems to be a star racing through the Milky Way at 1.2 million mph, dragging a Neptune-sized ...

The four planet-strong "planet parade" currently visible to the naked eye in the night sky for a short time after sunset will ...

Jupiter has been high in the sky in the evening lately, and that stirred a memory of the first time I ever saw Jupiter ...

The zodiacal light shines in the evening as the Moon reaches Last Quarter and skims past Spica and Antares in the sky this ...

Scientists say the threat of a newly discovered asteroid has risen slightly in the past few weeks as the world's telescopes ...

From supermoons to a total eclipse to the national park’s biggest and best-attended star parties, these are the must-see celestial shows of the year ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may not be the full picture.