What is a waxing gibbous moon?

A waxing gibbous moon appears more than half lighted, but less than full. It’s in the sky when darkness falls and lights up the early evening.

All you need to know: 2020’s Harvest Moon

It’s an early October Harvest Moon in 2020, coming up on October 1-2 for the Northern Hemisphere. What’s more, this Harvest Moon will be near fiery red Mars. Wow!

EarthSky’s top 10 tips for super stargazers

Here are 10 simple tips that can help you connect with the night sky, and have fun.

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! Click in here, and prepare to have your mind expanded.

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Photos of fiery Mars, nearly at its best in 2 years

Photos from the EarthSky community of the bright planet Mars, now nearly at its best. Earth will pass between Mars and the sun – bringing the planet to a once-in-two-years opposition – on October 13, 2020.

Asteroid or space junk? Approaching object might become Earth’s mini-moon

A newly discovered “asteroid” may become a new mini-moon for Earth. Instead of an ordinary asteroid, it might be a lost rocket from the Surveyor 2 mission, launched from Earth more than 50 years ago.

The detection of phosphine in Venus’ clouds is a big deal

Here’s how we can find out if it’s a sign of life.

Watch online today: Small, close-passing asteroid

Watch online today as asteroid 2020 SW swoops in for its closest approach to Earth on Thursday. The asteroid will pass just 7% of the moon’s distance. Charts here for telescope users. How to watch online.

Astronauts shelter as ISS boosted to avoid orbital debris

The International Space Station underwent an unscheduled reboost in orbit yesterday, to avoid a collision with an unknown piece of space junk. The 3-man crew was ordered to shelter, but is safe.

Before 2020 ends, a great conjunction of Jupiter and Saturn

The upcoming great conjunction of Jupiter and Saturn will be December 21, 2020. It’ll be their closest conjunction since 1623. But don’t wait. Start watching them now!

2020 Arctic sea ice minimum 2nd lowest on record

On September 15, 2020, Arctic sea ice reached its annual minimum extent, the 2nd-lowest on record. The Arctic region in general is warming 3 times faster than the rest of the planet.

Earth in the balance today

Guy Ottewell’s insights on today’s autumnal equinox.

A Chinese perspective on autumn

In Chinese thought, autumn is with the direction west, considered to be the direction of dreams and visions.