Enjoying EarthSky? Subscribe.

238,391 subscribers and counting ...

The water whorls of baby starfish

Video shows the beautiful and efficient mechanism that tiny starfish larvae use to swim, feed and grow.

Watching solstices, equinoxes from space

A satellite view of how sunlight falls on Earth’s surface during the solstices and equinoxes illustrates how our planet’s tilt causes a change in seasons.

Ceres bright spots get names

The International Astronomical Union approved the new names on November 26, and scientists used them while discussing other findings about Ceres at this week’s American Geophysical Union meeting.

1st test of new theory of gravity

Eric Verlinde’s new theory of gravity – an alternative to Einstein’s theory – eliminates the need for dark matter. To test it, astronomers measured gravity around 33,000 galaxies.

Robot eyes to see asteroid Bennu

A spacecraft now traveling to asteroid Bennu will retrieve an asteroid sample. Scientists equipped the OSIRIS-REx spacecraft sophisticated cameras to watch it all unfold.

New Zealand quake reveals new land

The 7.8-magnitude earthquake off the coast of New Zealand’s South Island on November 13 created a thin swath of newly exposed land. Before and after images.

Mystery of sun’s coronal heating

Exploding “heat bombs” might explain why the sun’s upper atmosphere, or corona, sizzles at millions of degrees – hundreds of times hotter than at the surface.

It’s a bird, a plane, the tiniest asteroid!

Asteroid 2015 TC25 is small enough to be straddled by a person, reminiscent of the iconic bomb-riding scene in the movie Dr. Strangelove. It swept between us and the moon a year ago.

Hurricane risk to US northeast coast

Due to shifting weather patterns, the northeastern coast of the United Sates could see more frequent and more powerful hurricanes in the future, says new research.

What would Earth be like with no moon?

Earth without its moon would be a very different world indeed. No eclipses. Smaller tides. But the biggest change would be in the length of Earth’s day.