Images captured by NASA's Solar Dynamics Observatory have revealed that "coronal loops" give off subtle flashes of ultraviolet light before a solar flare, which could act as an early warning system ...

These are noctilucent (night-shining) clouds. “Even though the sun has set in Gale Crater, the clouds are high enough in the atmosphere that the sun still shines on them, making them seem to ...

Also known as night shining clouds, they are visible when ice crystals form high in Earth's atmosphere and are underlit by the Sun. On Thursday and Friday they were spotted from Aberdeenshire ...

As soon as it gets dark, two bright lights become visible—the brightest in the southwest and an almost-as-bright light in the east. What are they?