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Earth
Extreme rainfall and flooding, as Earth warms
Global warming puts more water vapor in Earth's atmosphere. The water vapor will fall out of storms in extreme rainfall and flooding.
September 22, 2023
Astronomy Essentials
Visible planets and night sky for September
Mars is going into the sun. Jupiter and Saturn are evening objects. Morning planets are Venus, Jupiter and Mercury. Visible planets, here.
Earth
Space
Solstices and equinoxes in a video from space
See how sunlight falls on Earth's surface during the solstices and equinoxes, and get a better understanding of why Earth's tilt causes the seasons.
September 22, 2023
Sun
Sun activity: Another almost-X flare!
Sun activity for September 22 is moderate, with an M8.7 flare and CME. Earth's geomagnetic field has quietened, but may become active over the next two days.
September 22, 2023
Earth
Why does Earth have 4 seasons every year?
Some assume our planet's changing distance from the sun causes the four seasons. But it's actually the tilt of the Earth's axis.
September 22, 2023
Space
There may be less water ice on the moon than we thought
We know there is water ice on the moon. But a new study suggests there is less of it in the moon's permanently shadowed regions than we previously thought.
September 21, 2023
Astronomy Essentials
On the equinox, are day and night equal?
Day and night are mostly equal on the equinox. There's a bit more daylight because the sun is a disk, not a point, and Earth’s atmosphere refracts sunlight.
September 21, 2023
Earth
Florida’s bleached corals get emergency sunshades
Scientists constructed sunshades over bleached corals in two of Florida's national parks in an effort to protect them from further damage.
September 21, 2023
Space
Spaceflight
Psyche mission to explore priceless asteroid
The Psyche mission will launch on October 5, 2023, on a mission to explore the metal-rich asteroid Psyche. Learn more about the mission and asteroid here.
September 20, 2023
Earth
Ants, little but tough: Lifeform of the week
Ants are common insects with unique capabilities. They can harvest, herd, milk, and build amazingly complex and stable underground cities.
September 20, 2023
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