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Sun
Sun news: Solar stuff headed our way, aurora watch!
Sun news, October 7, 2026: AR4549's M-class flares sent a halo CME toward Earth, due early October 9. NOAA issued a G2 watch. Dark skies, aurora hunters!
October 7, 2026
Earth
Kelvin waves: Will El Niño bring coastal flooding to American west?
As El Niño continues to strengthen, it could cause Kelvin waves to move east and eventually trigger coastal flooding in the North American west.
October 7, 2026
Tonight
Find the Andromeda Galaxy using Cassiopeia
Leave the city behind this weekend, and go galaxy-hunting! Cassiopeia - one of the easiest constellations to identify - points the way to the Andromeda Galaxy.
October 7, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for October
Visible planets and night sky guide. Tomorrow morning, look for the moon near bright Jupiter and the star Regulus before they are too far away!
October 6, 2026
Space
Solar system’s most bizarre moons! Take the tour
The solar system’s most bizarre moons reveal active, complex worlds that continue to surprise scientists. Are any of them harboring life?
October 6, 2026
Earth
Hurricane Nolo is now Typhoon Nolo. Where is it going next?
Hurricane Nolo became Typhoon Nolo on October 4, 2026, after crossing the International Date Line. It is slowly churning toward Japan.
October 6, 2026
Astronomy Essentials
Flashing star in autumn? Here are 3 candidates
Flashing star in October? Discover 3 bright stars that shimmer in red, green and other colors, and find out why they put on this dazzling show.
October 6, 2026
Astronomy Essentials
Human World
Smart scopes are amazing. Here’s why I love mine
There are many different smart scopes on the market today. They're great for astrophotos. Info here. Plus stunning photos made with smart scopes!
October 6, 2026
Astronomy Essentials
We fly between the sun and Saturn. At opposition today
Don't miss Saturn at opposition on and around the night of October 4, 2026. That's when our planet Earth passes between the sun and Saturn.
October 4, 2026
Human World
Space
World Space Week is October 4 to 10. Find events here
World Space Week dates back to 1999 and runs every year from October 4 to 10. This year, the theme is The Rocket Revolution. Find events near you here.
October 4, 2026
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