Asteroid 2000 WO107 will pass safely November 29, closer in subsequent flybys

Asteroid 2000 WO107 will pass Earth safely on November 29 at 11 times the moon’s distance. Look here for charts and more information.

Scientists predicted a large sunspot. Now it’s here

Last week, scientists from the National Solar Observatory predicted a large sunspot would emerge before Thanksgiving. Now the sunspot – AR2786 – is in view. Here’s how they did it.

Curiosity rover spots signs of ancient megafloods on Mars

We already know that Gale Crater on Mars used to hold a lake or series of lakes a few billion years ago. Now, NASA’s Curiosity rover has found evidence for ancient giant floods that washed through the region as well.

Seeing things that aren’t there? It’s called pareidolia

Seeing a dragon in a patch of clouds or a face on the moon, are examples of what’s called pareidolia. Take a look at these photos to test your own abilities to recognize patterns.

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To reduce chances of spreading coronavirus, keep indoor air clean

Being indoors with other people is a recipe for spreading the coronavirus. But removing airborne particles through proper ventilation and air filtration can reduce some of that risk.

Epidemiologist explains CDC guidance on 15 minutes of exposure

New guidance from the CDC says that 15 minutes of exposure – regardless of whether that occurs at one time – can result in transmission of the coronavirus.

Is Mars still volcanically active?

A new study of geologically young lava flows in Elysium Planitia suggests that Mars might still have residual volcanic activity below its surface. The finding could also correlate with seismic activity detected by the InSight lander in the same region and may have implications for possible Martian life.

Is Earth’s new mini-moon a 60s-era rocket booster?

A mysterious object discovered in September has now become a new mini-moon for Earth. It appears to be a lost-and-found 60s-era rocket from the Surveyor 2 moon mission, launched from Earth more than 50 years ago.

What is a waxing gibbous moon?

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

Will SpaceX’s Starlink satellites ruin stargazing?

SpaceX’s satellites will populate the night sky, affecting how we observe the stars. And this is just the beginning of private satellite mega-constellations.

Photos of 2020’s Leonid meteor shower

EarthSky Community members around the world are sharing their photos of this year’s Leonid meteor shower. Beautiful! Thanks to all who contributed.

NASA to test its SLS megarocket in the coming weeks

The ongoing pandemic has slowed testing for NASA’s Space Launch System megarocket, but the process is resuming and has checked off a key milestone: powering up the core stage.

Before 2020 ends, a great conjunction of Jupiter and Saturn

Jupiter and Saturn are getting closer, as they near their once-in-20-years conjunction on December 21, 2020. At their closest, they’ll be only 0.1 degrees apart. That’s just 1/5 of a full moon diameter. Start watching them now, and you’ll see them draw close together.