High Speed Supernova Ejecta

ZeroHedge:

Unlike “international terrorism” or “man-made global warming” which are purely human-made concoctions driven by political agendas, the threat of asteroid collisions with the earth is very real, and provides a very serious basis for international cooperation on the common aims and in the interest of humankind.

Anyone see IPAW (International Panel for Asteroid Warning) on the horizon? IPAW scientists, just like IPCC (International Panel on Climate Control) scientists will talk up the threat of asteroid impacts to the point where millions of people will be almost as terrified of imminent asteroid impacts as they already are of global warming and tobacco smoke.

And it will offer new ways of bullying and browbeating millions of people. Because, after all, these people really just want to control other people.

How would IPAW set about bullying everyone?

It’s not too hard to imagine. IPAW scientists would issue asteroid warnings when any new NEOs (Near Earth Objects) were discovered. And as asteroid detection systems improved, there’d be more and more asteroids detected. It would start with one a day, and then rise to 10 a day, and then 100 a day. Anxiety would gradually rise.

People would get notified on their mobile phones of expected impact locations and impact times. There’d be TV asteroid impact warnings just like weather forecasts. People would start checking for impact warnings before travelling anywhere.

Eventually there would be warning sirens just like WW2 air raid warning sirens, and bunkers for people to shelter in. People would be kept off the streets. Anyone found on them would be arrested by armed police.

Whole cities would periodically be evacuated. There would be forced mass movements of peoples from entire regions. All “for their own good”, of course.

See? What a wonderful new opportunity for yet another army of bullies to start pushing people around.

Currently only 8000 of the estimated local asteroids (which are 140 meters or larger) have been identified and nothing is even closely in place to change their trajectories any time soon. Even if a collision were to occur in several years’ time, humanity’s technologies and priorities are dismally far from preventing such a collision. Just to put things in perspective, Bridenstine reminded his audience that in February 2013, a meteor measuring only 20 meters in diameter and travelling at 40 000 mph exploded over Chelyabinsk Russia sending a shockwave that destroyed property and injured over 1600 civilians. The energy in that blast was the equivalent of 30 Hiroshimas. This incident caught the world off guard, since everyone’s eyes were pointed at the other side of the earth where a much larger asteroid came within 17 000 miles but missed that same day.

Nobody saw the Chelyabinsk rock coming. And I suspect that nobody will see the next big impact coming. Or if they see it coming, it will most likely be too late to do anything about it.

There are probably millions of large rocks like Halley’s comet in highly eccentric (highly elliptical) long period orbits around the Sun. Halley’s orbital period is 75 years, but comet Hale-Bopp had an orbital period of 4200 years. Why not comets with orbital periods of 100,000 years? And the longer the orbital period, the higher the impact velocity.

A high speed rifle bullet has a velocity of about 1 km/second. Halley’s comet has a velocity of 55 km/second at perihelion. The extrasolar Oumuamua had a velocity of 88 km/second at perihelion. Supernova ejecta can be a lot faster:

the resulting supernova explosion expels much or all of the stellar material with velocities as much as 10% the speed of light (or approximately 30,000 km/s).

So if a supernova explodes anywhere near the Earth, there’ll be stuff flying out from it at these sorts of velocities.

The star Betelgeuse in Orion is 430 light-years away. And it’s due to explode sometime soon. If it sprays out material moving at 10% of the speed of light, it’ll start showing up 4300 years later.

The Crab Nebula is 6,523 light years away. It’s a supernova that was observed by Chinese astronomers in 1054 AD. So I estimate that Crab Nebula ejecta should start arriving in about 60,000 years time. It takes light about 8 minutes to reach the Earth from the Sun. So something travelling at 10% of the speed of light would traverse the orbit of the Earth in 2 x 80 minutes = 160 minutes, or about 3 hours. Do we have equipment to detect stuff moving at these very high speeds? I very much doubt it.

The Chicxulub asteroid which struck the Earth 65 million years ago, wiping out the dinosaurs, is estimated to have been about 11 km in diameter, and travelling at about 12 km/second. But given that kinetic energy is proportional to the square of velocity, it could have been a 20 metre radius iron sphere moving at a speed of 30,000 km/second. That’s about the same size as the Chelybinsk rock, that nobody saw coming.

About Frank Davis

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7 Responses to High Speed Supernova Ejecta

  1. Clicky says:

  2. beobrigitte says:

    Anyone see IPAW (International Panel for Asteroid Warning) on the horizon? IPAW scientists, just like IPCC (International Panel on Climate Control) scientists will talk up the threat of asteroid impacts to the point where millions of people will be almost as terrified of imminent asteroid impacts as they already are of global warming and tobacco smoke.
    By the time that happens, people will have had an overdose of global warming and tobacco smoke scaremongering. There is a high probability that people will say: “Oh, whatever!” – whilst they light their next cigarette after the most “unhealthy” meal they just ate, flushed down with home brewed beer or moonshine – “After all, remember the baby-boomer generation being alive then in such numbers that the governments on this planet didn’t have the money to pay their state pension? They were told that even they lived longer than their parents!!”

    Fear paralyses only for a period of time. The fearmongers seem to forget that.

    People would get notified on their mobile phones of expected impact locations and impact times. There’d be TV asteroid impact warnings just like weather forecasts. People would start checking for impact warnings before travelling anywhere.
    I don’t think so. The people in power are more likely to keep their mouths shut, get their kin out the areas and curl up somewhere “safe”. (Whatever this means). The excuse for that will be fear of riots. Then they lose total control.
    Best example 2019:
    https://www.statnews.com/2019/05/14/could-an-emergency-declaration-over-ebola-make-a-bad-situation-worse/
    We hear remarkably little about this ongoing epidemic. I take it the virus is yet again one step ahead of us.

    Eventually there would be warning sirens just like WW2 air raid warning sirens, and bunkers for people to shelter in. People would be kept off the streets. Anyone found on them would be arrested by armed police.
    How much would the armed police be paid? Anyone with common sense and survival instinct would get out! After all, this is a REAL thread, no fake second hand smoke damage thread!

    Nobody saw the Chelyabinsk rock coming. And I suspect that nobody will see the next big impact coming. Or if they see it coming, it will most likely be too late to do anything about it.
    That will be nothing new, either.
    Considering that there is more cash in managing illnesses and useless-to-outright-dangerous life-style “medication” why should cures be invested in???
    https://www.statnews.com/2019/05/14/war-of-words-over-pharma-commitment-to-research/

    There are so many things we all could be frightened of to death. How about just enjoying life?

  3. waltc says:

    The asteroids are drawn to earth by the smell of tobacco smoke which travels, undiluted, at a speed of 1000 light years a minute. Since science has proven that exposure to galactic cigarette smoke imperils the very existence of the universe, asteroids are sent here to target and destroy any place that harbors smokers. Attention Earthlings: if you live anywhere within the radius of 3000 miles of a smoker, your family, your block, your city and perhaps your whole country will be destroyed. .

  4. slugbop007 says:

    Anton Petrov spoke about a new study that indicated that volcanic eruptions in India and another part of Earth happened around the same time as the asteroid impact that supposedly killed the dinosaurs. 

    slugbop007

  5. DP says:

    Dear Mr Davis

    Next up: IPSVE – Intergovernmental Panel on Super Volcano Eruptions.

    Apparently the one under Yellowstone is ‘overdue’ for an eruption, and another lurks under Southern Italy, either of which could end civilisation as we know it.

    I was going to mention the link between asteroid impact and volcanic eruptions, but since Mr slugbop007 already has, I won’t.

    DP

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