In the Halo universe, the biggest threat is an alien hegemony called the Covenant. Who are they and what do they want?

E-Day is on the horizon, so we thought it'd be a good time to dive into the mad world of Gears of War and rank every entry ...

We explain this extraordinary phenomenon—and why solar flares and coronal mass ejections go together like spots on Dalmatians ...

A festive auroral display may be put on for a lucky few when coronal mass ejections hit Earth on Christmas Eve and Christmas Day.

The European Space Agency's (ESA) Juice spacecraft launched on April 24 to explore Jupiter's icy moons Ganymede, Europa and Callisto. Juice is currently on an eight-year-long journey to the outer ...

It was a full halo CME and it left the Sun at a phenomenal 3,161 kilometers (1,964 miles) per second. If it had been directed ...

India’s space agency, ISRO, has achieved a monumental milestone with the launch and successful deployment of Aditya-L1, the ...

Because they're pointed dead-on at Earth, halo CMEs can be the most dangerous ... they are major events that can blanket the planet in radio blackouts, physically damage satellites and ...

Those clouds did produce an incredible lunar halo that was widely seen in the ... bright “star” to the right of the moon will be the planet Jupiter! What a sight it would be if the skies ...

On Earth, we usually determine the mass of an ... and there is all the regular matter like stars, planets, and us, which is known as baryonic matter. We have several approaches to determining ...

You know L1 and L2 and polar and MEO. L3 and L4 and halo and GEO. But do you recall, the most famous orbit of all?

A reanalysis of the data from the "rubber-ducky" comet 67P, collected nearly a decade ago, suggests comets may have deposited a lot more water on Earth than scientists previously thought.