Later, Sydney Chapman and Julius Bartels included the idea of a twice-yearly aurora borealis season in their book ...

Oh, spring — the season of fresh starts, lengthening days and the first outdoor pints of the year. In the Northern Hemisphere, the spring equinox marks a turning point in the seasonal cycle, a moment ...

The spring equinox on March 20 marks the start of the spring season, bringing longer days to the Northern Hemisphere. Here's ...

The first day of spring 2025 arrives on March 20 at 10:47 UTC, bringing astronomical significance, cultural traditions, and ...

The spring equinox on March 20 marks the start of spring and the astrological new year as the sun enters Aries.

Both the equinoxes and solstices determine the start of a new season. The summer solstice begins on Friday, June 20, 2025, in the Northern Hemisphere. This will be the longest day of the year ...

The vernal equinox arrives on Thursday, marking the start of the spring season for the Northern Hemisphere and the fall in ...

The vernal equinox arrives today, marking the start of the spring season for the Northern Hemisphere and the fall in the Southern Hemisphere. On the equator, the sun will be directly overhead at noon.

Earth's northern hemisphere warms up literally for the astronomical start to spring. Here's what to know about the season.

The official first day of spring occurs this week in the Northern Hemisphere ... the autumn season arises, and many ancient sites mark the start of a season cycle. The Mayans called the day ...