Summer officially began today (June 21) at 10:57 a.m. EDT (1457 GMT). Summer officially began in the Northern Hemisphere today (June 21), marking the longest day of the year. During the June ...

The vernal equinox arrives on Tuesday, marking the start of the spring season for the Northern Hemisphere ... Astronomical seasons depend on how the Earth moves around the sun.

This year, the Northern ... Hemisphere's seasons are reversed. (Here's the difference between astronomical and meteorological seasons.) On two moments each year—what are called solstices—Earth ...

a planet that’s perfectly aligned wouldn’t have seasons. But Earth isn’t perfectly aligned on its axis. This small misalignment, called an obliquity, is around 23 degrees from vertical for Earth. So, ...

Spring has officially sprung in the Northern Hemisphere. Late last night (March 19) was the March equinox, an annual astronomical event that marks the change of seasons across the globe.

This collision caused the Earth to wobble or tilt on it's axis, creating seasons! As the axis tilts away from the sun's rays in the Northern Hemisphere, this is the winter solstice. Also known as ...

Every year, Earth follows a familiar pattern of seasonal changes: As summer rolls around in the Northern Hemisphere ... understand how other planets have seasons, we can look at what drives ...

Earth's axis will be side-on to the sun, meaning there will be more daylight in the Northern Hemisphere from then until June's solstice. Besides the beginning of astronomical spring, it also ...

For people who live in the northern hemisphere ... This is what the change of seasons looks like, as seen by a satellite. How Earth's axis and orbit drive the seasons Our planet's orbit is ...

The Earth’s tilt is the reason for the changing seasons. The top half of the Earth we call the northern hemisphere, and the bottom half we call the southern hemisphere. At this point in the ...