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Spaceflight
LAUNCH DELAYED! Polaris Dawn to launch Wednesday
LAUNCH DELAYED. Polaris Dawn - an all-civilian mission aiming to set a record for highest orbit of Earth - is now scheduled to launch Wednesday morning.
August 27, 2024
Astronomy Essentials
Tonight
Visible planets and night sky guide for August and September
Visible planets and night sky guide for August 2024. Look for the moon near the planets Jupiter and red Mars, and the stars Capella, Aldebaran and Betelgeuse.
Earth
Svalbard is melting above the Arctic Circle
Svalbard is melting. These Norwegian islands are one of the fastest-warming places on Earth. Satellites witnessed rapid melt in the summer of 2024.
August 27, 2024
Sun
Sun news August 27: That’s more like it! 2 M flares
Sun news for August 27: Flaring levels have increased with 2 M flares, plus a C9.9. We had a slow couple of days. Is more activity ahead? Stay tuned.
August 27, 2024
Constellations
Sagitta the Arrow lies inside the Summer Triangle
Sagitta the Arrow is a dim constellation that lies inside the Summer Triangle. It contains one Messier object, a small globular cluster.
August 27, 2024
Space
Ancient Mars lake was larger than any on Earth
Lake Eridania is our earthly name for the largest known Mars lake. This ancient lake was bigger than any lakes on Earth. Where did it go?
August 26, 2024
Earth
The passion flower is our flamboyant lifeform of the week
The passion flower plant is a gift for the senses. Its flowers are aromatic, abundant and colorful. And some types have an edible fruit.
August 26, 2024
Space
Voyager 2: Our 1st and last visit to Neptune
On today's date, August 25, 1989, Voyager 2 flew over the north pole of Neptune, making its closest approach to a planet in its outer solar system Grand Tour.
August 25, 2024
Space
Polaris, the North Star, has spots on its surface
Observations of Polaris, the North Star, show large bright and dark spots on its surface. It's the first glimpse of the surface of a Cepheid variable.
August 25, 2024
Earth
Human World
Understanding extreme weather with Davide Faranda
Join us at 12:15 p.m. central (17:15 UTC) on Monday, August 26, for a LIVE YouTube chat with a climatologist on dangerous and sometimes deadly weather extremes.
August 25, 2024
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