As the Northern Hemisphere welcomes spring today, the Southern Hemisphere is marked with the first day of autumn.

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

Beginning Dec. 14, 4:20 p.m. sunsets come back in the picture, with the sun setting 4:22 p.m. on the Winter Solstice, and ...

So what is a solstice ... the sun, when viewed from the Sphinx, sets precisely between two of the pyramids on the summer solstice. The Incas of South America celebrated the corresponding winter ...

The winter solstice came on Monday at 5:02 a.m. ET ... the degree to which the planet is tilted relative to the sun. The axis around which the Earth spins isn't straight up and down — it's ...

When the North Pole is tilted towards the sun, it is summer in the Northern Hemisphere. In December, the winter solstice marks the exact moment the Northern Hemisphere is tilted the furthest away ...

The shortest day of the year is the winter solstice. A solstice is the moment the Earth's tilt toward or away from the sun is at a maximum, according to the National Weather Service.

The solstice will occur at 9:21am GMT in the UK, and the sun will set at 3:53pm in London. It is the astronomical start of winter, although the meteorological winter begins a bit earlier ...

(NOAA via AP) Meanwhile, at the winter solstice, the Northern Hemisphere is leaning away from the sun — leading to the shortest day and longest night of the year. The winter solstice falls ...

The exact moment of the winter solstice varies from year to year due to a slight misalignment between the Gregorian calendar and the actual rate of the Earth’s rotation around the sun.