Arizona stargazers, mark your calendars because on Friday, Sept. 19, the night sky will host a celestial conjunction. Not to be confused with an alignment, a conjunction occurs when two or more ...

Wondering if it's a full moon tonight or if the planet Venus and Regulus star will be visible again today? Here's what to know about this weekend's celestial events. Tonight's waning crescent moon ...

If you're looking up at the sky on Friday, Sept. 19 2025 and seeing some very bright stars near the moon, you might be wondering: What's the deal? What are those stars? Are they planets? The answers ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...

A visible line of planets has for weeks been the talk of astronomers and hobbyist stargazers who have sought to catch a sight of our solar system's worlds. Online chatter and a frenzy of media ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the edge of our solar system, evading all our efforts to spot it. Some astronomers ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. An illustration of confirmed dwarf planets and their moons. From left to right: Pluto (with ...

Here's everything you need to know about this week's parade of seven planets. Getty Images A seven-luminaries-deep parade of planets will line up and light up the night sky this week, folks. Just ...

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe. When you purchase through links on our site, we may earn an affiliate ...

Fantasizing about interplanetary exploration is a fun mental exercise, but the harsh realities of life (or lack thereof) in ...

A celestial conjunction featuring the moon, Venus, and the star Regulus will be visible on Friday, Sept. 19. This event will be bright enough to be seen without a telescope, though clouds could ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the edge of our solar system, evading all our efforts to spot it. Some astronomers ...