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Author Topic: Fireballs, comets, meteorites, meteors and asteroids  (Read 96414 times)

R.R. Book

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Re: Fireballs, comets, meteorites, meteors and asteroids
« Reply #570 on: April 16, 2018, 04:41:20 PM »
What's even more scary than a giant rock hurtling toward us is that it may also be both electrically charged from zooming through space, as well as radioactive and magnetic depending upon mineral content... :-X


ilinda

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Re: Fireballs, comets, meteorites, meteors and asteroids
« Reply #571 on: April 16, 2018, 06:04:24 PM »

I got this notice in email from NASA about a surprise asteroid that gave us only one day of warning passing halfway between the Earth and the moon. It was the largest known asteroid to ever pass that close to Earth in observational history.
Max.
And they just keep coming....  It's like we're living on borrowed time....

MadMax

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Re: Fireballs, comets, meteorites, meteors and asteroids
« Reply #572 on: April 29, 2018, 10:52:58 AM »
Tick, Tock, Tick ..

Incoming close calls! NASA says 5 'close' asteroid flybys will take place today

https://www.sott.net/article/384212-Incoming-close-calls-NASA-says-5-close-asteroid-flybys-will-take-place-today

The Earth will experience a number of (relatively) close calls in one day, as NASA reports that an alarming total of five asteroids will hurtle towards - but happily not quite at - our planet.

The Center for Near Earth Object Studies at NASA's Jet Propulsion Laboratory in California publishes a comprehensive list of space rocks that are worth keeping an eye on, just to prepare yourself for any potential armageddons or extinction-level collisions. These rocks can range in size from a few meters in length to asteroids more akin to skyscrapers.

The series of space rock flybys begins at 10:29 UTC Sunday as asteroid 2013 US3, travelling at a respectable 7.69 km/s (27,646 kph) with a diameter of between 160-360 meters whizzes past us. For comparison, the Eiffel Tower measures 324 meters from ground to tip.

Next up are asteroids 2018 GO4 and 2018 GY1, which are expected to scream past us at 12:34 and 18:20 UTC respectively.

Asteroid 2018 GO4 measures approximately 30-68 meters (between three and six school buses in diameter) and has a brisk pace of 8.57 km/s. Meanwhile, 2018 GY1, on the other hand, won't be hanging around our neck of the galactic woods for long given that it travels at a whopping 16.69 km/s, despite measuring 100 and 230 meters in diameter.

Closing the day's near orbit rock show will be asteroid 2028 FV4 at 19:13 UTC (at 6.52 km/s) followed two hours later by 2002 JR100 at 21:15 UTC (7.68 km/s), both with a diameter of roughly a Boeing 747 (between 60 and 71 meters). Thankfully, the rocks are projected to hurtle past us at the relatively safe distance of 3,870,720 km (roughly 10 times further away than the moon is from Earth), so we needn't worry too much.

Should similar space rocks come a little too close for comfort, NASA is working on inventive ways to make sure we don't go the way of the dinosaurs, including nuclear detonations and intense laser blasts (How very comforting ..)

Max.
"Ignorance is Bliss" - (Agent Smith the first Matrix Movie)

R.R. Book

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Re: Fireballs, comets, meteorites, meteors and asteroids
« Reply #573 on: April 30, 2018, 10:00:50 AM »
 :o

MadMax

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Re: Fireballs, comets, meteorites, meteors and asteroids
« Reply #574 on: May 17, 2018, 05:38:59 PM »
Meteor fireball seen in skies above Fredericksburg, Virginia

https://www.sott.net/article/385809-Meteor-fireball-seen-in-skies-above-Fredericksburg-Virginia

Fredericksburg-area residents reported that an object from outer space tore through the sky Tuesday, just before midnight, leaving in its wake a sonic boom heard by residents from Culpeper to Colonial Beach.

The meteor was "the brightest and most amazing fireball I've ever seen, in person or in any videos," wrote Chase K. of Dahlgren in his report to the American Meteor Society. The night sky appeared like a giant lightning strike and it was almost as bright as daylight when the primarily red and orange fireball was seen, he said.

He didn't notice any sound, but an observer who identified himself as William G. of Colonial Beach wrote in his report to the society that there was a loud boom and "ground shake similar to a military artillery round.”

Max.
"Ignorance is Bliss" - (Agent Smith the first Matrix Movie)

MadMax

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Re: Fireballs, comets, meteorites, meteors and asteroids
« Reply #575 on: June 05, 2018, 02:27:39 PM »
Watch: Asteroid Explodes Over South Africa – Just Hours After Being Discovered

http://www.thedailysheeple.com/watch-asteroid-explodes-over-south-africa-just-hours-after-being-discovered_062018

The incredible moment a high-speed asteroid the size of a car exploded just seconds before impact was captured on video by two farmers in South Africa.  :(

From NASA’s Jet Propulsion Laboratory:

    A boulder-sized asteroid designated 2018 LA was discovered Saturday morning, June 2, and was determined to be on a collision course with Earth, with impact just hours away. Because it was very faint, the asteroid was estimated to be only about 6 feet (2 meters) across, which is small enough that it was expected to safely disintegrate in Earth’s atmosphere. Saturday’s asteroid was first discovered by the NASA-funded Catalina Sky Survey, located near Tucson and operated by the University of Arizona.

The asteroid entered Earth’s atmosphere at the high speed of 10 miles per second (38,000 mph, or 17 kilometers per second) at about 16:44 UTC (9:44 a.m. PDT, 12:44 p.m. EDT,6:44 p.m. local Botswana time) and disintegrated several miles above the surface, creating a bright fireball that lit up the evening sky, NASA reports.

Max.
"Ignorance is Bliss" - (Agent Smith the first Matrix Movie)

 

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