Anyone see NASA crash that satty into that asteroid on Monday?Wonder if it accomplished what they hoped.Either way good to see NASA back in the game. I always had an interest in space exploration and astronomy so it was cool too see.
DART sattellite
- Thread starter mvphilly
- Start date
$325 million crashed into a giant space rock to alter its path, government job so I expect in a few months that the alter path of the giant space rock will collide with earth.
It was said that it was the equivalent of crashing a shopping cart into one of the great pyramids at 4 miles per second.
Branden
Branden
Nearly 10.4 billion joules, or a bit over 2 metric tons of TNT. Energy goes up with the square of velocity, if it were 5 miles per second, it's about 60% more joules energy.
Branden
I got kicked in the joules once and she had a wide foot so she got both of them.
But did it alter your trajectory? That’s the important detail.
I think if it is certain that a rock posing significant danger to us is headed this way, to realistically deflect the thing would require multiple spacecraft to attach high thrust solid rockets like the SLS SRBs to the asteroid and then fire them all at once after they have been aligned properly and the generated thrust may be able to change it's direction of travel. Merely crashing something into the thing is equivalent to shooting 5.56 bullets at a industrial wrecking ball that is swinging directly at you. It's not gonna work. Rockets and propulsion systems on the other hand, we may stand a chance and the 'success' of this mission hopefully paves the way for bigger future projects.
Actually, if you do the math, it's surprising how little it takes to cause a deflection in a zero-G vacuum environment. Also, given a large enough distance, how little a deflection is required to alter a path enough to miss even an Earth sized object.
They could have saved a few dollars by just launching Stacey Abrams at it. Of course the rockets would have needed a few more pounds of thrust to get her into space.
Tell me you know nothing about physics, without telling me you know nothing about physics.
Tell me something, how do you propose we get those 1.3 million pound 4 segment SRB's onto a distant asteroid.
Branden
That would solve some problems....and be entertaining at the same time.They could have saved a few dollars by just launching Stacey Abrams at it. Of course the rockets would have needed a few more pounds of thrust to get her into space.
Branden
That fat skank probably would have moons orbiting around her gravitational well…They could have saved a few dollars by just launching Stacey Abrams at it. Of course the rockets would have needed a few more pounds of thrust to get her into space.
Hey Stacy, are those Klingons circling Uranus?
Sirhr
I think the fact that they are plausible, is what makes them successful...except for the Sharknado franchise. How in Zeus' butthole they've made so much money is beyond me, they are absolute shit movies.
Branden
Viral Video Shows Sharks Swimming In Flooded Streets Of Fort Myers Amid Hurricane Ian
Twitter user, Armando Salguero, posted a 10-second clip which shows a fish thrashing the water.
www.ndtv.com
I've seen Armageddon. I don't think this is right.
I have always told my wife that an extinction event like the one that wiped out the dinos will be our demise not climate change or other follies.She never believed me until we watched the DART live and I could see her looking at me out of the corner of her eye as I was smiling smugly.
The hell they don’t.
Airline Passenger Hides Snake in His Pants
Officers noticed the man had "something in his trousers that didn't belong there."
www.newsweek.com
Real 'Snakes on a Plane'? Animal smuggler caught stuffing snakes in his pants
The traveler was headed to Saudi Arabia.
www.foxnews.com
Real-Life Snakes on a Plane: Man Smuggles 7 Snakes
A Texas snake expert pleaded guilty in federal court Tuesday to smuggling seven Peruvian snakes into the United States by concealing them underneath his jacket. William Lamar, 63, was caught with the snakes in August at Dallas-Fort Worth International Airport. He had purchased the snakes at a...
www.nbcdfw.com
And that’s not even including the occasional politician. Especially the poisonous ones from Texas fleeing to DC to avoid a called session - remember that
So when NASA impacted the pyramid sized rock with their shopping cart sized coke can
traveling at 21,120 FPS was there any deviation in the path of the asteroid.
traveling at 21,120 FPS was there any deviation in the path of the asteroid.
They haven't released the report on the results yet. Word is it will be several weeks. It's orbital period is about 12 hours, and i'm sure they're going to want to take many measurements to ensure the data is valid before they write their findings for the greater scientific community.
Branden
One of the concerns with impact solutions to the large asteroid problem is that you might just break it apart and then hammer the earth with a few dozen destructive pieces…
There have been some very good documentaries on the various methods to alter trajectories… the most promising are things like small tugs that can alter the whole thing a tiny bit…
It’s an interesting problem of physics, orbital mechanics and geology! The Chelyabinsk meteor was a wake up call.
Prior to that NASA’s entire historic funding since day 1 for protection from comets and asteroid impacts was less than the budget for a single Hollywood movie about getting hit my a comet or asteroid.
It’s a serious threat and a small-city-killing-size object hits earth on average every few hundred years. Between Tanguska and Chelyabinsk… and new detection and tracking regimens… the threat has suddenly become a lot more real.
Doesn’t take a very big rock bursting over a city to kill a lot of people. Doesn’t have to be a Alvarez-size slate-wiper to do serious damage.
Following this with interest! Despite the jokes.
Sirhr
There have been some very good documentaries on the various methods to alter trajectories… the most promising are things like small tugs that can alter the whole thing a tiny bit…
It’s an interesting problem of physics, orbital mechanics and geology! The Chelyabinsk meteor was a wake up call.
Prior to that NASA’s entire historic funding since day 1 for protection from comets and asteroid impacts was less than the budget for a single Hollywood movie about getting hit my a comet or asteroid.
It’s a serious threat and a small-city-killing-size object hits earth on average every few hundred years. Between Tanguska and Chelyabinsk… and new detection and tracking regimens… the threat has suddenly become a lot more real.
Doesn’t take a very big rock bursting over a city to kill a lot of people. Doesn’t have to be a Alvarez-size slate-wiper to do serious damage.
Following this with interest! Despite the jokes.
Sirhr
Relax, they need time to compute the updated trajectory. This thing is a tiny asteroid orbiting a larger asteroid, so they need several observations over time to track a new trajectory to compare against the pre-impact trajectory. So maybe in a couple of months they’ll be able to reliably compute how much acceleration was applied by the impact and that will finally be some real world data to work with for once.
Parts carried up to rendezvouz point, ISS, or newer station by conventional vehicle, ie., SLS or similar. Assemble in orbit, then latch onto shuttle craft powered by ion thrusters and hypergolic attitude adjustment systems which will carry the assembled giants to the asteroid and attach them to it's surface. This method will become the future of manned space projects for as long as we can see and is what was discussed thoroughly in the 2001 and 2010 series of Odyssey novels. Want to explore Mars in the near future? Maybe even Europa and Ganymede, and drop a few atmospheric probes into Jupiter along the way? The only way these projects will be possible is orbital construction work putting these ships together high up there. Anywhere else would be impossible.
The problem with ion thrusters is there isn't anything available today that comes remotely close to the thrust levels to accelerate several million pounds of mass to a sufficient velocity to travel millions of miles to a distant threat. So they're fine on small satellites and spacecraft, but there isn't anything available, and nothing on the horizon either to pull off your proposal. Science fiction novels are just the fantasy of possibility, devoid of reality and the laws of physics.
SLS isn't a viable option for anything that would require many launches. SLS is a wasteful turd. It's using RS-25 engines from the space shuttle era that are not being manufactured anymore. So what we have in inventory, is what we have, and that's it. Even if they get the vendors to the point they can start building them, it's going to take many years to get them all certified, and then get engines certified and a production line re-established. Those 4 RS25's get dumped into the ocean with each launch, gone for good. The SRB's are reusable, but it takes time. I was unable to find a timeline posted that discussed the turnaround time from ocean recovery, to completed refurbishment and readiness to be fitted to another launch mission.
In all reality, not to keep sucking on Musk's nuts, but he has the most realistic option. Even ULA Delta IV heavy can get in on the game. Liquid fuel rockets that are almost entirely reusable, short refurbishment timelines and a fraction of the cost. SpaceX can launch a falcon heavy 40 times for the same price tag as a single SLS launch, and he can probly actually launch 40 times before an SLS can launch twice. 40 kinetic impactors have a far higher probability of success than a mission you propose. Complexity has a way of increasing probability of failure. Maybe instead of a shopping cart at the pyramids, perhaps for real we use a more massive impactor, going faster, and then do that 10 times, or 20, or as many times as necessary for the trajectory to be altered sufficiently for a near miss. All cheaper, and logistically far simpler, than assembling a ship in space, transporting it to a very distant asteroid, and landing on it to fix some SRB's on it to push it out of the way. When it comes to life or death, I vote the least complicated solution.
Branden
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