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See The ‘Planet Parade’ During Fall Equinox And A Solar Eclipse
The autumnal equinox marks the start of fall with equal daylight and nighttime due to Earth's 23.5-degree axial tilt, affecting both hemispheres differently, NASA said.
The autumnal equinox occurred on Monday, September 22, 2025, marking the start of fall in the Northern Hemisphere and spring in the Southern Hemisphere.
This event occurs when the sun aligns with Earth's equatorial plane because of the planet's 23.5° axial tilt, resulting in nearly equal durations of daylight and darkness around the globe.
Alongside the equinox on September 22, observers in regions including New Zealand, Antarctica, and select areas of the southern Pacific Ocean will experience a striking partial solar eclipse at sunrise, with the moon obscuring up to 86% of the sun.
The five-planet parade continues this week, featuring Venus, Jupiter, Saturn visible to the naked eye, and Uranus and Neptune visible with binoculars or a telescope.
Following the equinox, sunlight in the Northern Hemisphere will gradually decrease daily until the winter solstice on December 21, leading to longer nights and cooler temperatures.