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Feature Story
Nighttime Begins at the South Pole: No Sunrise for the Next Six Months
Tomorrow, March 20, researchers at the U.S. Amundsen-Scott South Pole Station in Antarctica will watch the sun set for the…
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Satellite Snapshots
Star-Crossed Solstice: The Shortest Day of the Year Coincides with the Great Conjunction
The winter solstice took place at 5:02 a.m. EST today, and will be closely followed by the Great Conjunction, the closest that Jupiter and Saturn will
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Feature Story
How to Safely Stare at the Sun: SOHO, SDO, and GOES-R Instruments
As an agency, NOAA’s science isn’t just limited to Earth and its atmosphere. NOAA’s reach goes…
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Feature Story
What’s the Big Deal about Solar Cycles?
The Sun is Earth’s nearest star—a giant orb of hydrogen and helium about 93 million miles away. To many people, it looks…
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Feature Story
Top 5 Times Solar Activity Affected Earth
Over the course of the Sun’s 11-year solar cycle, the star goes through a period of increased and decreased activity…
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Satellite Snapshots
Largest Solar Flare Since 2017 Spotted on the Sun
On May 29, 2020, NASA's Solar Dynamics Observatory captured the largest solar flare since October 2017.
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Satellite Snapshots
This Year’s Vernal Equinox Is the Earliest in 124 Years
This year, the vernal equinox occurs on March 19, 2020. The last time it occurred this early was in 1896.
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Satellite Snapshots
GOES East Celebrates the Autumnal Equinox
In 2019, the official start of fall—the Autumnal Equinox—was Monday, Sept. 23 at 3:50 a.m. EDT.
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