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

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

The astronomical start of spring officially takes place overnight with the occurrence of the vernal equinox, marking the ...

Chicagohenge is a stunning biannual event that happens during the spring and autumn equinoxes, when the sun aligns perfectly with Chicago’s street grid.

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 ...

Chicago's default speed limit will stay at 30 mph, after the City Council on Wednesday voted down a bid to lower the default speed limit to 25 mph, following months of delay for the controversial ...

A Chicago startup is making waves in the renewable-energy sector. A Chicago startup has raised $25 million in less than a year, with a goal of helping to ease and accelerate the country's grid ...

A federal agency last week agreed to essentially favor fossil-fuel generators over generators of renewable energy in the grid serving Chicago. That threatens to take Illinois in the wrong ...