Lenticular clouds have been known to put on some dazzling displays around here, and Tuesday night was no different. Marcy LaGagnier snapped these photos of a lenticular cloud display over the Cascades ...

Astronomers suspect that a massive metallic cloud swirling in a nearby star system could be hiding a giant planet or dwarf star from view, after it drastically dimmed a sun-like star for around nine ...

These noctilucent clouds, reflecting light from the sun after sunset, have been visible in Martian skies for the past four fall seasons. Credit: NASA / JPL-Caltech / MSSS A rover got a new view of ...

In a groundbreaking study published in The Astrophysical Journal, astronomers have discovered high-velocity gas clouds near the M83 spiral galaxy, moving at velocities that differ sharply from the ...