[Lex Computer & Tech Group/LCTG] It's official: Earth safe from 'city-killer' asteroid 2024 YR4!

Tue Feb 25 05:49:57 PST 2025

This is an interesting article on how the estimates of an asteroid’s path change as more data becomes available.

John Rudy

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Bedford MA

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From: Space.com <space at smartbrief.com> 
Sent: Monday, February 24, 2025 4:13 PM
To: jjrudy1 at comcast.net
Subject: It's official: Earth safe from 'city-killer' asteroid 2024 YR4!

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Earth safe from 'city-killer' asteroid 2024 YR4! | Where will the 'Blood Moon' total lunar eclipse be visible? | Night sky for tonight: Visible planets, stars and more

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February 24, 2025

CONNECT WITH SPACE.COM 

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The Launchpad

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(Robert Lea (created with Canva))

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlwCifPauBWcNOGyv?format=multipart> Earth safe from 'city-killer' asteroid 2024 YR4! 

Hey, Space Fans!

Happy Monday and we're starting off the week with a big (think huge space rock wize) weight off our minds as astronomers just dramatically reduced the potential threat risk of the newfound asteroid 2024 YR4 down to miniscule odds. The asteroid briefly set a record for the highest threat level ever, at a 1-in-32 chance of hitting Earth in 2032.

"The NASA JPL Center for Near-Earth Object Studies (CNEOS) now lists the 2024 YR4 impact probability as 0.00005 (0.005%) or 1-in-20,000 for its passage by Earth in 2032," Richard Binzel, Professor of Planetary Science at the Massachusetts Institute of Technology (MIT) and creator of the Torino scale exclusively told Space.com. "That's impact probability zero folks!" 
Whew!

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(Gary Hershorn/Getty Images)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlxCifPauBWcNXJNg?format=multipart> Where will the 'Blood Moon' total lunar eclipse be visible? 

February's Full Snow Moon may be over, but the best is clearly yet to come as we're gearing up for the first total lunar eclipse of 2025 coming up in the March, and chances are high that you'll be able to see it.

The dramatic "Blood Moon" will shine overnight on March 13 and March 14, and anyone with clear skies in the Americas could see it. But other countries could get a taste, too! Find out where here.

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Skywatching

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(Starry Night)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlyCifPauBWcNihSf?format=multipart> Night sky for tonight: Visible planets, stars and more 

Feel like looking up tonight? If you have clear skies, you may be in for a planet bonanza.
Venus, Saturn and Mercury will all be visible just after sunset in the wetern sky. Here's when, where and how to see them, as well as how bright they'll be!

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(Space.com / Josh Dinner)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlzCifPauBWcNuaeI?format=multipart> Aurora forecast: Will the northern lights be visible tonight? 

Speaking of things in the night sky. Auroras are one of the most dazzling shows in the night sky, but to see them, you have to be in the right place at the right time. Our aurora forecast live blog tells you everything you need to know about upcoming geomagnetic activity and the likelihood of seeing the northern lights depending on your location. Check it out!

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Spaceflight

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(US Space Force)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlCCifPauBWcNrGLW?format=multipart> 1st look at secretive X-37B space plane in orbit! 

We just got a tantalizing (and rare) look at the usually secretive X-37B robot space plane, which is flying a classified mission for the U.S. Space Force.

In a new public photo, the Space Force pulled back the curtain to show the first view of the winged mini-shuttle from orbit, which also happened to capsule a stunning view of Eearth at the same time.

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Science & Astronomy

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(BAE Systems, Courtesy NASA/JPL-Caltech)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlDCifPauBWcNsqXp?format=multipart> NASA's 'SPHEREx' space telescope is kind of a big deal 

NASA is counting down to launch its newest space telescope this week, and scientists are all for it. 

The observatory, called SPHEREx, is a $488 million mission is designed to map the entire sky in 3D, in wavelengths invisible to the human eye. Here's why it's such a big deal.

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SpaceX

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(SpaceX)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlECifPauBWcNuvFq?format=multipart> SpaceX launches 22 Starlink satellites from California 

SpaceX's Starlink internet satellites got a fair bit bigger over the weekend with not one, but two batches of the space-based internet satellites launching to orbit - albeit from different coasts. Shown here is a SpaceX view of the first flight, which launched 22 Starlink satellites to orbit Saturday night from Vandenberg Space Force Station. See video in the launch by clicking the story here.

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(SpaceX)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlFCifPauBWcNxUMd?format=multipart> And yet MORE Starlinks lift off? (video) 

SpaceX's Starlink fleet launch on Saturday came one day after yet another clutch of the internet satellites took wing on their own. 
A SpaceX Falcon 9 rocket launched 23 of the Starlink internet satellites into orbit from Florida's Cape Canaveral Space Force Station on Friday, setting the stage for a rocket doubleheader. See video of the launch.

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Search for Life

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(JAXA)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlGCifPauBWcNCOuE?format=multipart> Aliens may need sulfuric acid like we need water 

There may be nothing as refreshing (or vital) as water for life on Earth, but on other worlds something more - let's say, interesting - may do. Candidates ranged from the liquid forms of methane and ethane, ammonia and carbon dioxide to even stranger possibilities like pitch and molten rock.

But the most surprising champion is a chemical we Earthlings think of as painfully hostile to life: concentrated sulfuric acid.

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Editor's Note

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(University of Cambridge)

 <https://r.smartbrief.com/resp/twcPCKjdenDEwHlHCifPauBWcNJcAt?format=multipart> On This Day in Space! Feb. 24, 1968: Jocelyn Bell discovers 1st pulsar 

On Feb. 24, 1968, an astronomy grad student Jocelyn Bell announced that she had discovered the first pulsar. A few months earlier, she noticed what she called a "bit of scruff" in the data from her telescope. A signal was sending pulses every 1.3 seconds. At first she and her advisor, Anthony Hewish, thought it could have come from aliens. They ruled out that option when they found another signal coming from a different part of the sky. Bell and Hewish found four pulsars before publishing their findings, but they still had no explanation. Scientists have since figured out that pulsars are rapidly spinning neutron stars that radiate narrow beams of light in opposite directions.

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