From ancient stargazing to modern pet safety — here’s how this phrase got its name and why it still matters today.

The dog days of summer” may seem to refer to the hottest days of the year, but the origin of the phrase is actually a little ...

You may have heard of the phrase "dog days." But what does that mean? Here's how mid-summer came to be called the dog days.

Sirius, one of the nearest stars to our solar system, will be briefly occulted by a three mile-wide asteroid called 4388 Jurgen, but only for those inside a narrow path through Mexico, US, and Canada.

The brightest star in the night sky is Sirius, also known as the "Dog Star." Here's when, where and how to see it—and glimpse its rainbow of colors.