Aurora chaser and photographer Harlan Thomas ( @TheAuroraGuy) was about 18.5 miles (30 kilometers) north of Calgary along a rural stretch he calls "The Twisted Pond Road" when the surprise display of ...

On a tranquil summer evening, just as the sun dips below the horizon and darkness begins to settle, an ethereal spectacle sometimes appears in the sky—clouds that shimmer with a ghostly blue ...

Astronomers have spotted another never-before-seen "nova" blaze to life in the night sky. This may be the first time that ...

Noctilucent clouds, Earth's highest clouds, shine blue in the twilight sky from late May to August in the northern hemisphere — and all you need are your naked eyes.

9 night sky events to see in June, from a strawberry moon to interstellar clouds This month's night sky is filled with close-range meteors, swirling nebulas, and prime stargazing conditions.

When you look up at the night sky, can you see the stars? If you live in a large city or near one, the answer is probably no. The culprit is not just clouds and weather — it's light pollution.

Vast clouds of gas within it slowly collapse to form new stars. In turn, these light up the gas clouds in a riot of colors, visible in this image from the Hubble Space Telescope.

Venus moves east as July progresses and stands 3° due north of Aldebaran on the 14th, after skirting the northern regions of ...

A total lunar eclipse will flush the moon red Thursday night into Friday morning across the country including Boston, where viewers will have to hope for a break in the clouds to see the spectacle.

In its first year alone, it will double the amount of data collected so far by every other instrument in the history of ...

Astro Bob: Ease into summer with fireflies, noctilucent clouds and a cool conjunction There's more twinkling at night than the stars.

By midnight, the clouds should thin out or disappear around Indianapolis. High level clouds may still make the night sky a little hazier than ideal. High level clouds are less likely to reflect light ...