A distant Sun-like star suddenly went dark for months, stunning astronomers who quickly realized something massive was ...

That would make it thousands of times more massive than any moon orbiting a solar system plane  — so massive it could make ...

Earth reaches its closest point to the sun in its 2026 orbit on Jan. 3. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The sun will appear ...

NORFOLK, Va. — The earth’s journey around the Sun is not a perfect circle. Instead, our planet follows a slightly oval-shaped path called an ellipse, meaning our distance from the Sun changes ...

At the start of the year, Earth will quietly reach a milestone in its orbit around the sun. Known as perihelion, this is the moment when our planet is closer to the sun than at any other point in the ...

The Hubble Space Telescope observed the debris belt and dust clouds around the star Fomalhaut, which was blotted out to allow the fainter features around it to be seen. Credit: NASA / ESA / Paul Kalas ...

Yes the darkest day of the year is here, but that means brighter days are ahead. Sunday is the shortest day of the year north of the equator, where the solstice marks the start of astronomical winter.

So, Monday marked a milestone birthday for yours truly. It was … a big ‘un. The years fly by: It seems like just yesterday I was 22 and eating tofu for the first (and last) time. Speaking of time, ...

Astronomers have mapped the turbulent edge of the Sun where solar matter manages to escape the Sun's fierce magnetic grip. Reading time 2 minutes Stars are lively, often unpredictable parts of the ...

ORLANDO, Fla. – A halo around the moon put on a show-stopping display Tuesday night. No, it wasn’t aliens but simply ice crystals making up the high, thin cirrus clouds drifting through the Central ...

Monash University provides funding as a founding partner of The Conversation AU. We live in changing times. While we once flippantly threw villains to the lions, now we seek to fire them into the Sun.

In an eleventh-hour attempt to slow down global warming, some scientists have been proposing — or even testing, at a small scale — whether releasing aerosolized particles into the atmosphere to dim ...