Can you see the Big Dipper in autumn?

Sure, it’s easy to recognize, but sometimes the Big Dipper is low in the northern sky, or not visible at all. That’s the case now, in the evening. How to spot it.

October guide to the bright planets

Throughout October 2018, you can see 3 planets as darkness falls: Mars, Saturn and Jupiter. Bright Venus is heading into the sunset glare throughout October. It will pass between us and the sun before the month’s end.

Shine on, Harvest Moon

The Harvest Moon comes on September 24 for the Americas and September 25 for most of the rest of the world.

All you need to know: September equinox

We have an equinox coming up on September 23 at 01:54 UTC. That’s September 22 for clocks in North America. Details here. Happy autumn (or spring)!

Why your equinox sun rises and sets due east and west

How is it possible for an equinox sun to rise due east – and set due west – for everyone around the world? How can you visualize it? Illustrations here.

Day and night exactly equal at equinoxes?

We’re coming up on an equinox, a word that means “equal night.” Days and nights are nearly equal across the globe now. Nearly, but not quite. Here’s why.

Mars is closest to the sun today

On September 16, 2018, Mars reaches perihelion, its closest point to the sun in its 2-year orbit. Mars’ brightness in July and August – and a recent global dust storm on the planet – are both linked to this event.

See it! Jupiter, Venus and the young moon

Have you been watching Jupiter, Venus and the moon these past few evenings? Enjoy these photos from the EarthSky community. Thanks to all who shared!

Venus, she or it?

Are you interested in the famous 8-year cycle of Venus? The charts in this post – from astronomer Guy Ottewell – illustrate it. Also, weigh in on whether you think we should describe Venus as she or it!

How far could you travel and still see Earth?

You couldn’t see Earth from another star. From even the closest stars, the sun’s glare makes Earth impossible to see. And inside our own solar system? Spacecraft photos tell the tale.