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Old 05-20-2019, 11:52 AM
 
Location: East Coast of the United States
18,085 posts, read 20,165,259 times
Reputation: 14034

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Quote:
Originally Posted by Matadora View Post
Alarmists? Take a good look around at the climate damage that's occurring due to human activity.

Start searching on how global warming is affecting the following:
  • Norfolk Navy Base
  • Chesapeake Bay
  • Tangier Island
  • Denver kids with asthma
  • Air pollution killing 200,000 prematurely each year
  • Atmosphere, Oceans and Biosphere
  • Mega fires 5,000 square miles yesteryear vs. 500 thousand square miles today
  • How we have changed our relationship with fire and how this change has transitioned to the Atmosphere, Ocean and Biosphere
This doesn't mean that the human species is dying or about to die out.

Fatalism is not science. Never was and never will be.
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Old 05-20-2019, 12:19 PM
 
Location: Pacific 🌉 °N, 🌄°W
11,145 posts, read 5,045,367 times
Reputation: 7150
Quote:
Originally Posted by BigCityDreamer View Post
This doesn't mean that the human species is dying or about to die out.

Fatalism is not science. Never was and never will be.
I never stated anything you just ascribed to me. I also don't believe in predetermined destiny.

I was simply responding to your unsubstantiated alarmist claims.

The earth including the hundreds of thousands of species and plants we are driving into extinction, would fare well if the humans species went extinct just as what occurred with other species during the Cretaceous–Paleogene extinction event.

Thank science for bringing us this knowledge!

Last edited by Matadora; 05-20-2019 at 12:28 PM..
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Old 05-20-2019, 01:08 PM
 
Location: Pacific 🌉 °N, 🌄°W
11,145 posts, read 5,045,367 times
Reputation: 7150
Quote:
Originally Posted by DavePa View Post
There’s an asteroid out there called 99942 Apophis that’s over 1,000 feet wide, and it’s scheduled to fly by Earth on FRIDAY April 13th, 2029. Will speed past our planet at an estimated distance of around 19,000 miles, potentially coming closer to the surface than some orbiting spacecraft

NASA's Excited About the God of Chaos Asteroid Heading Toward Earth ......

Seems like a kind of prediction of doom possible ....

Will there be only 10-years left for earth as we know it? NASA Excited about what? Will we see it visible? if so as the time gets closer? Will it be a world concern?

Wasn't sure which forum to use .... but seems of a Great Debate and seems as the time gets close ..... we will hear more if real fear is here?

God of Chaos Asteroid Apophis is Headed for Earth
The date in your link is not up to date.

NASA Rules Out Earth Impact in 2036 for Asteroid Apophis

In 2013 it was ruled out as likely to strike earth.
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Old 05-21-2019, 05:56 AM
 
Location: East Coast of the United States
18,085 posts, read 20,165,259 times
Reputation: 14034
Quote:
Originally Posted by Matadora View Post
The earth including the hundreds of thousands of species and plants we are driving into extinction, would fare well if the humans species went extinct just as what occurred with other species during the Cretaceous–Paleogene extinction event.
Humans will eventually become extinct or evolve into other distinct species. However, that will not happen for hundreds of thousands of years.

That kind of time frame is unfathomable to us. It might as well be forever.
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Old 05-22-2019, 06:23 PM
 
6,990 posts, read 6,739,997 times
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If NASA is predicting a killer asteroid then I am pretty sure we are safe.
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Old 05-22-2019, 07:03 PM
 
Location: Madison, Alabama
3,966 posts, read 2,023,709 times
Reputation: 3028
Quote:
Originally Posted by UrbanAdventurer View Post
If NASA is predicting a killer asteroid then I am pretty sure we are safe.
And you base you opinion on what?
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Old 05-23-2019, 11:04 AM
 
Location: Seattle
2,317 posts, read 490,180 times
Reputation: 2154
A CME like the Carrington Event seems more likely and should be a bigger concern in the short term. We should have the technology in place to spot any X-class CMEs heading our way.
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Old 05-23-2019, 01:55 PM
 
Location: West Coast of Europe
22,367 posts, read 19,826,503 times
Reputation: 8820
Maybe the world should develop a kind of weapon to destroy dangerous objects before they come close. What is the point of being able to detect objects years before they arrive here and then sit back and hope it won't hit us
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Old 05-24-2019, 08:39 AM
 
22,784 posts, read 17,257,359 times
Reputation: 9491
Quote:
Originally Posted by Neuling View Post
Maybe the world should develop a kind of weapon to destroy dangerous objects before they come close. What is the point of being able to detect objects years before they arrive here and then sit back and hope it won't hit us
If we can detect an asteroid while it is still years away then we have time to deflect rather than try to destroy it. One idea would be to impact the asteroid with a small spacecraft in order to shift the asteroid's orbit just enough so that it would no longer be a threat. The Double Asteroid Redirection Test (DART) is a NASA mission designed to test this idea.
“DART is a critical step in demonstrating we can protect our planet from a future asteroid impact,” said Andy Cheng of The Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, the DART investigation co-lead. “Since we don’t know that much about their internal structure or composition, we need to perform this experiment on a real asteroid. With DART, we can show how to protect Earth from an asteroid strike with a kinetic impactor by knocking the hazardous object into a different flight path that would not threaten the planet.”

https://www.nasa.gov/feature/nasa-s-...t-design-phase

Last edited by Mike555; 05-24-2019 at 08:57 AM..
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Old 05-24-2019, 09:45 AM
 
Location: West Coast of Europe
22,367 posts, read 19,826,503 times
Reputation: 8820
They mention the size of 1 km, that is huge. It would take quite some power to change the path of or destroy such a massive object, especially given the speed of those objects. The speed and mass of such an object add up, so to speak.

In this context: when there is no air in space, is it even possible to create, say, an explosion next to an asteroid in order to change its course? When there is no air, there is no change in air pressure so to speak that could push the object away, right?

And on a more general level, how does propulsion in a vacuum work?!
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