CHICAGO - Every spring and fall, Chicago’s skyline transforms into the perfect frame for a celestial event known as ...

Chicagoans can get a glimpse of the sun perfectly aligning with Chicago's east-west streets during sunrise and sunset.

While Chicago got a blast of summer-like temperatures on Friday and well above-average temperatures Saturday, astronomical ...

The best natural light show in Chicago isn’t a fireworks display or a concert laser show—it’s Chicagohenge. Twice a year, ...

As Naperville considers the future of its electric grid, an array of energy procurement options was presented to a special meeting of the city’s Public Utilities Advisory Board Thursday night ...