Eleanor Imster

The ozone hole: Closing the gap

After thinning at alarming rates in the 1980s and 90s, the ozone layer over Antarctica is starting to recover.

Full moon at perigee side by side with crescent moon at apogee

See it! Photos of 2019’s biggest supermoon

A selection of photos of the February 18 and 19 full moon – biggest and brightest supermoon of 2019 – from the EarthSky Community.

Gold honeycomb-like pattern on purple, black graph inset.

Where is the universe’s missing matter?

When astronomers add up the mass of all the normal matter in the present-day universe, about a third of it can’t be found. Where is it?

Florescent green aurora. Sky criss-crossed with wires and telephone poles.

Watch: Aurora borealis over HAARP

Never-before-seen footage of night skies over the HAARP antenna array in remote northern Alaska.

Ancient spider fossils have reflective eyes

A remarkable set of fossil spiders found in South Korea display reflective eyes.

5 things about radiation donuts, in 2 minutes

Did you know that our planet has radiation donuts? These giant, donut-shaped clouds of radiation are called the Van Allen Belts.

How animals love

“The animal world tells us again and again and again that love is really important.”

Heart Nebula

For Valentine’s Day 2019, here’s the Heart Nebula.

Another huge impact crater under Greenland ice?

A glaciologist has discovered a possible 2nd impact crater buried under more than a mile of ice in northwest Greenland.

Mars and Uranus

Eliot Herman captured the conjunction of Mars and Uranus on February 11, 2019, in the night sky over Tucson, Arizona. Note the color contrast between red Mars and blue Uranus.