明暗

Is spring really — finally — here?

· 每日资讯

Flowers blooms in front of the U.S. Supreme Court Tuesday, March 10, 2026, in Washington. (AP Photo/Mariam Zuhaib) 2026-03-16T14:01:42Z It’s far from clear if the weather is planning to cooperate, but spring arrives — technically, at least — Friday. The vernal equinox arrives on Friday, 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. Equinoxes are the only times when both the North and South poles are lit by sunshine at the same time. Equinoxes have been marked and celebrated around the world for centuries. In Japan, for example, Vernal Equinox Day is a public holiday. At the Mayan site Chichen Itza in Mexico, people gather during the equinox to watch the sun create a shadow pattern that resembles a serpent descending a pyramid called El Castillo. But what is happening in the heavens? Here’s what to know about the Earth’s orbit. What is the equinox? As the Earth travels around the sun, it does so at an angle, making the sun’s warmth and light fall unequally on the northern and southern halves of the planet for most of the year. But during the equinox, the Earth’s tilt is neither toward the sun nor away from the sun, so both the northern and southern hemispheres get an equal amount of sunlight. The sun rises almost exactly due east and it sets almost exactly due west. The word equinox comes from two Latin words meaning equal and night. That’s because on the equinox, day and night last almost the same amount of time — though one may get a few extra minutes, depending on where you are on the planet. The Northern Hemisphere’s fall — or autumnal — equinox can land between Sept. 21 and 24, depending on the year. Its spring — or vernal — equinox can land between March 19 and 21. The exact time of the equinox is the moment the sun is directly overhead at the equator. For 2026, it’s Friday, March 20, at 10:46 a.m. EST. From there, days will get a little long

原文链接: AP News