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This year, the vernal equinox occurs on March 19, 2020. The last time it occurred this early was in 1896.
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There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in…
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Spring has officially sprung here in the Northern Hemisphere—while in the Southern Hemisphere, autumn has begun!
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It is that time of year again (it happens twice) when the relative angle of Earth is perpendicular to the Sun, causing equal…
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In 2019, the official start of fall—the Autumnal Equinox—was Monday, Sept. 23 at 3:50 a.m. EDT.
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There are two times each year, in March and September, when the amount of daylight and darkness is “nearly” equal at all…
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It’s officially autumn in the Northern Hemisphere—the season when days get shorter as that half of the world heads toward…
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Spring has officially arrived in the Northern Hemisphere, while the Southern Hemisphere is embracing autumn.
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Here you can find satellite imagery showing the change of seasons due to the Earth's tilt.
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Watch the amount of sunlight reaching the North Pole increase with the coming summer solstice.
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June 21 marked the official start of astronomical summer in the Northern Hemisphere.
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Learn more about the solar terminator, the moving line that divides the daylit side of the planet and the dark, night side…
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Our most beautiful satellite imagery, from unique landscapes to colorful visualizations from across our planet Earth.
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he Suomi NPP satellite's VIIRS instrument captured this week's nor'easter moving away from the U.S. East…
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This week, top officials from NOAA shared new updates on efforts to resolve the technical issues impacting the performance…