Summer, the season of the year occurring between spring and autumn. Astronomically, summer in the Northern Hemisphere lasts from about June 21 to September 23; in the Southern Hemisphere, from about December 22 to March 21.
There's a 45-million-ton asteroid out there with Earth's name on it. In 2029, it'll be closer to us than our moon is. And that's not even the fly-by that scientists are worried about. See more »