In February 2025, all seven of our planetary neighbors will be visible from Earth. So what does such a planetary alignment ...

The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it ...

Witness a rare celestial spectacle as all seven planets in our solar system align next week—an event that won't repeat until ...

NASA's Pioneer 11 spacecraft left the solar system! This was the second spacecraft to travel beyond the planetary part of our ...

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe.

Mississippi stargazers will be able to see 4 or 5 planets in the night sky with their naked eye this month. Will you be able ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

"The data from the termination shock encounter will be a treasure trove for space physicists worldwide who are eager to ...