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Cassiopeia and Perseus on October evenings
Cassiopeia and Perseus are neighbors in the fall sky. Use Cassiopeia's distinctive W or M shape to locate the dimmer Perseus on autumn and winter evenings.
October 20, 2024
First 1% of new cosmic atlas reveals millions of galaxies
The Euclid mission to survey the universe and understand the nature of dark energy and expanding universe has just released the first 1% of its cosmic atlas.
October 19, 2024
Eavesdropping on alien signals between exoplanets
Scientists looked for alien signals sent between exoplanets in the TRAPPIST-1 system. They used radio telescopes to seek the intelligent transmissions.
October 18, 2024
Comet A3 was the brightest comet in 27 years!
Comet A3 Tsuchinshan-ATLAS was the brightest comet in 27 years, since Hale-Bopp. Did you see it? More on the comet plus images here.
October 18, 2024
60% chance for La Niña in late 2024. Mild or cold winter?
The National Oceanic and Atmospheric Administration has issued a La Niña Watch for the northern autumn of 2024. If it happens, conditions will likely persist to early 2025.
October 17, 2024
Sun officially reaches solar maximum in its 11-year cycle
NASA and NOAA announced on October 15, 2024, that the sun has reached the peak of its 11-year solar cycle, or what is known as solar maximum.
October 16, 2024
A steam world exoplanet with an earthlike atmosphere?
Astronomers using the Webb space telescope say that the hot exoplanet GJ 9827 d has more water vapor than 1st thought. They call it a steam world exoplanet.
October 16, 2024
Meet Piscis Austrinus the Southern Fish and lonely Fomalhaut
Piscis Austrinus the Southern Fish is notable for its 1 bright star, Fomalhaut. From the Northern Hemisphere, look south in autumn to find it.
October 16, 2024
Monday’s livestream: Extreme weather and climate change with Davide Faranda
Watch our replay about climate change and extreme weather with climatologist Davide Faranda, an expert on cold spells, heatwaves and severe thunderstorms.
October 15, 2024
Comet A3 has an anti-tail! Can you see it?
Comet A3 and Earth have passed their closest point. But, early this week, we're crossing the plane of the comet's orbit. Some are seeing an anti-tail!
October 14, 2024
