Equinox sun above horizon all day at the poles

We know the equinox sun rises due east and sets due west. But what happens at Earth's poles? Does the sun look exactly the same at both poles?

Are day and night equal on the equinox? Not exactly

Are day and night equal at an equinox? No. Earth's atmosphere and our sun team up to give us more day than night during an equinox.

Equinox fun: Track the sun’s shift now until the solstice

On this equinox, start tracking the sunset point on your western horizon. You'll see a mighty shift between now and the June solstice.

What’s a galaxy? All you need to know about galaxies

What is a galaxy? We live in a galaxy called the Milky Way. But there is so much more to know about these grand and glorious star islands in space!

See the year’s fastest sunsets and sunrises around equinoxes

The year's fastest sunsets and sunrises happen around the equinoxes, and the slowest sunsets and sunrises happen around the solstices.

Zodiacal light on spring evenings

The zodiacal light is an eerie light extending up from the horizon. During the months around the March equinox is a good time to see it. How to see it, here.

What’s a constellation? What’s an asterism?

Constellations and asterisms are patterns of stars. Some asterisms consist of stars from different constellations, and some are part of 1 constellation.

Is Sirius the most luminous star in the sky?

Sirius is the brightest star in Earth's sky because of how close it is to us. It's so bright you might see glints of different colors flashing from it.

Total lunar eclipse March 2-3: Last one for 3 years!

Overnight on March 2-3, 2026, there will be a total lunar eclipse of the full Blood Moon. Where will it be visible? See animations, charts and details here.

Lunar eclipse: Tips for watching and enjoying

A total lunar eclipse is coming up overnight on March 2-3, 2026. Here are some tips for watching and enjoying the total lunar eclipse.