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.

While most clouds obstruct aview of the stars, these shimmering forms offer an exception — they enhance the night sky rather than diminish it.Photographs from regions like Vilnius, Lithuania ...

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

The Orion Nebula, the Pleiades and the Hyades open clusters could represent the different phases of star clusters: baby, ...

The nation’s first International Dark Sky Reserve will fill a chuck of the sparsely populated region containing night skies so pristine that interstellar dust clouds are visible in the Milky Way.

And although these clouds appear static over short periods of time, if you spend a while watching or photographing them, you'll see their shapes transform, ebb, and flow throughout the night ...

Orion, Pleiades, and Hyades may be stages of one star system’s life, revealing how star clusters form and change.

A "new star" is shining in the constellation Lupus thanks to an unexpected stellar explosion within the Milky Way — and it can currently be seen with the naked eye from parts of North America ...

Newborn stars set gas clouds aglow in this mosaic of images from the James Webb Space Telescope. This is the star-forming region NGC 1333, ... the brightest in the night sky, ...

Molecular clouds are composed of gas and dust and serve a vital purpose in star formation. Eos, a crescent-shaped gas cloud, is located about 300 light years away from Earth and is the size of 40 ...

This week, Aotearoa New Zealand officially celebrates Matariki for the fourth time, marked by the reappearance in the night sky of the star cluster also known as the Pleiades. Yet, ironically, the ...