Earth
Sharks may be hunting other sharks
Researchers uncovered a rare instance of large sharks preying on one another. The finding shows the complexity of shark interactions and resulting impacts.
Astronomy Essentials
Tonight
Visible planets and night sky guide for September
Visible planets and night sky guide for September 2024. Mercury and Regulus pair up in the morning sky. Look about 40 minutes before sunrise.
Space

Moon’s volcanoes were erupting only 120 million years ago

Scientists in China, studying samples brought back by the Chang’e-5 mission, say that the moon's volcanoes were active as recently as 120 million years ago.
Astronomy Essentials

What does opposition mean for an outer planet?

Opposition is when Earth passes directly between the sun and an outer planet, placing the outer planet on the opposite side of the sky from the sun.
Sun

Sun news September 8: A dark filament eruption

Sun news for September 8: The sun is calm today. The size and number of flares is down from previous days. We did see a cool and dark filament eruption.
Astronomy Essentials

Saturn at opposition – brightest for 2024 – on September 8

Don't miss Saturn at opposition on and around the night of September 8, 2024. That's when our planet Earth passes between the sun and Saturn.
Human World
Spaceflight

Ailing Starliner spacecraft returns to Earth sans crew

Boeing's Starliner capsule landed safely - without its crew - on Friday night. The 2 astronauts are still stuck aboard the ISS, slated to return in February.
Space

How asteroid Phaethon can spawn the Geminid meteors

Phaethon is a weird asteroid that behaves like a comet. It's also responsible for the Geminid meteor shower. Find out how it does so, here.
Today's Image

Deep-sky photos for August 2024: Editor’s picks

Enjoy this gallery of deep-sky photos for August 2024 from our EarthSky community. If you have a great photo to share, send it in too. We love to see them!
Earth

Earth’s core has a huge, hidden donut shape

Scientists in Australia have discovered a huge donut-shaped region in Earth's core. The finding provides new clues about the dynamics of Earth's magnetic field.